[05 REPLACEMENT r--55 no-500 REVISED ED. AVAILABLE /979 (tr J sgo `1\ Hyslop Field Laboratory Microstation Climate Survey LIIRRARY 17:i. OREGON STATE r". 'e-c71 16P/6 UNIVERSITY r,kicq). (Special Report 1 August 1978 Agricultural Experiment Station, Oregon State University, Corvallis
CONTENTS Probability of Frost 1 Average Daily Solar Radiation 2 Average Relative Humidity 3 Monthly Evaporation 4 Wind Frequency, Salem 5 Wind Frequency, Eugene 6 Daily Normal Temperatures 7 Extreme Values of Temperature and Precipitation Weekly Mean Soil Temperature AUTHORS: Wheeler Calhoun, Crop Science Department, Oregon State University; Earl M. Bates, National Weather Service, United States Department of Commerce, National Oceanic and Atmospheric Administration.
PROBABILITY DATES OF VARIOUS TEMPERATURE OCCURRENCE WILLAMETTE VALLEY Fifty Per Cent Chance Of: 28 32 Albany January February April 2 Corvallis January 28 February 27 April Eugene January March 6 April 8 Forest Grove February 10 March 29 April Portland January January February 28 Salem February 1 March 9 April 19 Twenty Per Cent Chance Of: 28 32 Albany February March April 17 Corvallis February March 19 April Eugene February March 28 April Forest Grove March 5 April 18 May Portland February 7 February March Salem February March 29 May 4 Ten Per Cent Chance Of: 28 32 Albany February March April Corvallis March 4 March 28 May 9 Eugene February April 6 May 2 Forest Grove March 17 April 27 May Portland February 19 February March Salem March 8 April 7 May 1
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CROP SEASON MONTHLY EVAPORATION From Standard Weather Bureau Open Pan (1953-) (inches) APR MAY JUNE JULY AUG SEPT OCT 1953.73 2.64 3.43 6.77 5.48 4. 1.65 1954 3.01 4.19 3.43 5.06 3.77 2.70 1.34 1.16 4.44 5.04 5. 6.72 4. 1. 1956 2. 4.52 4.53 7.74 5.72 4. 1.66 2.71 3.43 4.62 7.05 5.87 5.07 1.55 1958 1. 5. 4.51 8.29 8. 4.80 2.54 1959 2.80 3.27 5.00 9. 8. 3.57 1.84 19 2.37 2.90 7.27 9.89 6.87 4.72 2. 1961 2.01 2.33 6.97 8.53 7.06 4.55 1.97 1962 3. 3. 6.87 8. 6.74 5.01 1.05 1963 2.61 4. 5. 6.52 8.16 4.68 1.63 1964 2.75 4. 4.75 6.77 6. 4.56 2. 1965 2.86 4.96 6. 8.96 6.35 6.57 2.04 1966 3. 6.16 7.49 8. 8.77 4.69 2.62 1967 2.61 5.61 6.69 9.08 8.69 6.49 2.18 * 3.83 6.17 8.35 5.39 3.96 1.61 1969 2.73 5.83 5.36 7.61 8. 4.34 1. 1970 3. 4.87 7.08 9.36 8.19 4.86 2.81 1971 3.33 5.48 4.91 7.82 6. 5. 2.28 2. 5.58 6.00 10.27 8.42 5.40 3. MEAN 2.55 4.35 5.58 7.95 7.01 4.69 1.95 * Missing Data 4
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ESSA-WEATHER BUREAU AGRICULTURAL SERVICE OFFICE OREGON STATE UNIVERSITY Daily normal temperatures for Corvallis, Oregon, Hyslop Farm, extrapolated from normals at Eugene and Salem, Oregon. Day January Temperature Max Min Avg Day February Temperature Max Min Avg Day March Temperature Max Min Avg, 1 45 33 39 1 46 32 39 1 52 36 44 2 45 33 39 2 46 32 39 2,,, 52 36 44 3 45 33 39 3 46 32, 39 3 "52 36 44 4 44 32 4 46 3? 39 4 53 36 45 5 44 32 5 46 33 40 5 53 36 45 6 44 32 6 47 33 40 6 53 36 45 7 44 32 7 47 33 40 7 53 37 45 8 44 32 8 47 33, 40 8 53 37 45 9 44 32 9 47 33 40 9LI 53 37 45 10 44 32 10 47 33 40 10 53 37 45 44 32 48 33 53 37 45 44 48 3 54 37 46 44 49 34 42 54 37 46 14 44 14 49 34 42 14 54 37 46 44 49 34 42 54 37 46 16 44 16 49 34 42 16 54 37 46 17 44 17 50 34,,42 17 54 37 46 18 44 18 50 34' - 42 18 55 37 46 19 44 19 50 34 42 19 55 37 46 44 50 35 43 55 37 46 44 51 35 43 55 37 46 44 51 35 43 '' 55 37 46 44 51 35 43 55 37 46 45 51 35, 43 55 37 46 45 51 35 43 55 37 46 45 52 35 44 56 37 47 27 45 27 52 35 44 27 56 37 47 28 45 32 39 28 52 36, 44 28 56 37 47 29 46 32 39 29 52 36 44 29 56 37 47 46 32 39 56-37 47 46 32 39 56 37 47
NATIONAL WEATHER SERVICE AGRICULTURAL SERVICE OFFICE OREGON STATE UNIVERSITY Daily normal temperatures for Corvallis, Oregon, Hyslop Farm, extrapolated from normals at Eugene and Salem, Oregon. April Day Temperature Max Min Avg Day May Temperature Max Min Avg June Day Temperature Max Min Avg 1, 57 48 1 65 43 54 1 69 47 58 2;"` 48 2 65 43 54 2 01'69 o.47 58 3 57. 48 3 65 43 54 3')- 69 47 58 4 58 48 "-' 4 65, 43 54 4 '70 47 59 5 58 48 5 65 54 5 70 48 59 658 39 49 7-4, 6 66 44 55 6,70 48 59 58 39 49 7 66 44 55 7,70 48 59 8 58 39 49 8 66 44 55 8 70 48 59 9 39V -45 49 9 66 44 55 9 70 48 59 1-) 0,. 10 vq39 39_ 49 10 66 44 55 10-71 48 59 _ 40 50 66,,,\' 44 5,-.- 71-re 48 _ 0 40 50 66 44_ 55 71 48 ' 40 50 17 45 56 49 61 14, :;61 40 51 14 67 45 56 14 q 72 49 61 61 40' 51 67 45 56 -'72 49 61 16,,, 62, 40 51 16 67 45 56 16 72 49 61 17e 62 4f 52 17 67,,45 56 17 73 49 61 18 62 52 18 67, 45 56 18 c?-73 49 61 19 62 sr 52 19 67 45 56 19 73 G 49 61 63, ' 52-68 46 57 3349 61 63 52 68 46 57 74 49 62 63 _ 52 68 46 57 1-:1714 49 62 63 42 53 68 7\0 46 57 34 49 62 63 42 53 68')' 46 57,75 50 63 63 4r). 53 68 46 57 75e50 63 64 42 27\ 0. 53 68 46 57 75 50 63 64 42 53 27-39 4T 58 27 AL76 50 63 28 64 43 54 28 69 47 58 28,76 50 63 29,,._- 65 43 :-' 5 29 69P47 58 29 76 50 63 \,t 65 43 54 65'7 47 58 77 50 64 69 47 58
NATIONAL WEATHER SERVICE AGRICULTURAL SERVICE OFFICE OREGON STATE UNIVERSITY Daily normal temperatures for Corvallis, Oregon, Hyslop Farm, extrapolated from normals at Eugene and Salem, Oregon. Day July Temperature Max Min Avg August Day Temperature Max Min Avg September Day Temperature Max Min Avg 1 78 51 65 1 82 52 67 1 79 50 65 2 79 51 65 2 82 52 67 2 79 50 65 3 79 51 65 3 82 52 67 3.1c79 50 65 4 79 51 65 4 82 52 67 4-'7a... 50 65 5 8O 51 66 5 082 52 67 5 78 49 64 6 80 51 66 61-C, 82 52 67 6w78 49 64 7 80 51 66 7 ' 82 52 67 7 78 49 64 8 80 51 66 8 82 52 67 8 78 49 64 9 80 51 66 9 82 52 67 9 77-49 63 10-81 51 66 10 82 52 67 10 77 49 63 81 51 66 T1 51-66 z77 49 63 81 51 66 kl.81 51 66 1 77 44-63 81 51 66,t'. 81 51 66 72. 49 63 14 81 51 66 14 81 51 66 14 76 48 62 81 51 66 81 51 66 Y76 48 62 16 81 51 66 16 81 51 66 16 76 48 62 17 81 51 66 17 780 51 66 17 76 48 62 18 81-52 67 18 80 51 66 18 75 48 62 19 81 52 67 19,, 80 51 66 19 75 48 62 81 52 67 :2r. 80 51 66 75 47-61 -82 52 67 80 51 66 4-'5)75 47 61 82 52 67 80 51 66 75 47 61 82 52 67 80 51 66 74 47 61 82 52 67-79 51 65 74 47 61-83 52 68 79 50 65 73 47 83 52 68 79 50 65 73 47_ 27 83 52 68 27,79 50 65 27 72 46 59 28 83 52 68 28=`'79 50 65 28,72 46 59 29 83 52 68 29 79 50 65 29 72 46 59 83 52 68 79 50 65 71 46 59 83 52 68 79 50 65
NATIONAL WEATHER SERVICE AGRICULTURAL SERVICE OFFICE OREGON STATE UNIVERSITY Daily normal temperatures for Corvallis, Oregon, Hyslop Farm, extrapolated from normals at Eugene and Salem, Oregon. October Day Temperature Max Min Avg Day November Temperature Max Min Avg Day December Temperature Max Min Avg 1 45 58 1 57 39 48 1 49 36 43 71 45 58 2 56 39 48 2 49 36 43 3,c-.-70 45 58 3 56 39 48 3 49 36 43 4 ' 'JO 45 58 4 56 47 4 49 36 43 5-69 45( 57 5 47 5 49_ 36 43 6 68 45,-`- 57 6 5c 47 6 48 36 42 7 68 45 57 7 55 47 7 48 36 42 8 _68 45 57 8 54 46 8 48 36 42 9 0 67 44 56 9 54 46 9 48 36 42 10\ z' 67 44 56 10 54 " 46 10 48-36 42 77:66 44, -/55 54' 46 47 3C '' 66 44 J 55 53-46 47 35, 65 44 55 53 37 45 47 35 14,9',7'65 43 54 14 53,'. 37 45 14 47 35 65 43 54 53 37 45 47 35 16,,64 43 54 16 52 37 45 16 47 35 17 ''' 64 43 54 17 52,, 37 45 17 47 35 18 763 43,1/ 53 18 52' 37 45 18 47 35 19' _ 63 43 53 19 51 37 44 19 46 35, 62 4'L' 52 51,e 37 44 46 35,T) 62 42, 52 537 44 46 35 62 4;'52 51 37 44 46 35 42 51 5-6 36 43 46 35... ;`'. 42 51 50 36 43 46 34 40 ifr 51 50 r36 43 46 34 40,) 51 50-, A 36 43 4s- 34 40 27,7 59 ''' 50 27 50 36 43 27 45 34 40 28' 59 _ 50 28 50 36 43 28 45 34 40 29 -'68 40,49 29 -, 36 43 29 45 34 40 0, -57 407,49 401'36 43 45 33 39 57 40 49 45 33 39 10
EXTREME VALUES SINCE 1889 Extreme Data For Corvallis, Oregon January Date Max. 62 53, 70 Mina 49 1-ec-2 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19 27 28 29 59 57 58 64 56 57 59 57 56 58 57 61 61 61 62 59 61 61 61 64 64 59 64-1940 1953 1902 45, 14, 1962 33, 45, 1953 1928 1945 1970 61, 74 1958 1975 19, 75 75, 76 19 05, 19,, 35 1935 19 19, 40 40, 71 40, 3 8 18 16 10 9 6 9 0 1 7 17 8 4 7-1 1937 09, 19 1907 1907 1916 1950 1916 1949 19 1927 1962 02, 43 02,, 1950 1. 1.58 3.43 2. 1.65 2.55 2.00 1.36 1. 1.53 2.03 2.55 2. 1. 2.74 1.95 3.40 2. 1. 2.00 2.71 1.95 1.51 1.14 1.73 1. 1.69 4.28 1.28.75 1.29 1933 1933 1907 1966 19 1942 1953 1959 1950 1936 19 19 19 1953 1964 1970 19 1970 1975 1959 1965 1958 1958 1958
EXTREME VALUES SINCE 1889 Extreme Data For Corvallis, Oregon February Date Max. Min. Precip. 1 66. 1940 18 1. 1947 2 3 59 62, 62, 63 3-2 1950 18 1. 1.78 19 1942 4 61 1928-5 18 1.96 19 5 61 52, -2 18 1.00 1908 6 61 1963-2 18 1. 1943 7 63 1947 1929 1.27 1945 8 62 1952 17 1929 1.34 19 9 63 51, 63 1933 2.56 1919 10 64 1963 17 29, 33 2.76 1961 64 1963 18 05, 29 1. 1961 62, 71 1954 1. 1954 14 61 62, 47, 1951 71 18 1905 1905 1. 2.00 1954 1904 66 1902 1936 1.68 1904 16 68-1902 17 1956 1.93 1970 17 67 1916 1956 2. 1949 18 64 16, 43 1936 1. 1949 19 65 1916 1.57 62 1916 1. 19 63 1973 2.17 1956 63 63 02, 32, 16, 47 50, 42, 47 1.17.78 1949 69 67 1905 19 1962 1.29 1.47 14, 1902 68 1932 17 1962 1.17 1919 27 68 32, 68 18 1962 1.28 1971 28 68 01, 68 71 1.00 1940 29 68 19.77 1904
EXTREME VALUES SINCE 1889 Extreme Data For Corvallis, Oregon March Date Max. Min. 1 72 1905 1971 1.00 1977 2 73 1905 18 1971 1.46 3 68, 28 19 1.62 1916 4 65 28, 43 19 1.52 1902 5 65 1965.70 19 6 66 1965 14 1956 1.32 1916 7 73 1905 1956.76 8 76 1905 1.10 1951 9 77 1905 27 1.67 1966 10 72 19 27 1956 1. 1907 72 1934 1903.97 1961 72 1934 1906 1. 1946 71 1934 1906.82 1961 14 78 19 17,.90 19 78 1947 19 1.74 1908 16 77 1947 06, 17 1. 19 17 78 1947 1906 1.00 1945 18 77 1947 1.67 19 19 73 28 1965.80 1973 76 19 28 1954.95 1904 75 19 29, 44.96 1905 75, 39 29 1952 1.10 19 73 19 28 1.05 1907 69 1953 29 16, 42.77 1932 71 19 19 1.28 16, 73, 69 28 1919 1.89 1916 27 77 19 27 19 1.35 1940 28 74 1969 44,49,61 1.61 29 77 19 28, 72 1.86 1963 78 19 1936 1.90 1963 77 19 28, 70 1.76 1943 62
EXTREME VALUES SINCE 1889 Extreme Data For Corvallis, Oregon April Date Max. Min. Precip. 1 77 19 1936 1. 1934 2 78 1944 28 06, 70.46 3 76 1951 1918.66 1954 4 80 1949 1918.85 1901 5 82 19 28 1956.92 19 6 80 1906 27 1975.88 1902 7 78 28 19.77 1907 8 75 28, 28 1919.92 9 79 1904,27,29 1.83 1971 10 80 1904 29 1927 1.10 86 1904 29 1927.72 1971 85 1904 28 1903.68 84 43, 47 2.06 1937 14 84 43, 47 27, 19 1.14 1929 85 19 29 55, 67.69 1937 16 80 1947 29 19.59, 63 17 83 28 1964 1.06 1908 18 83 29 1902.65 19 19 82 1965 28 27, 68.82 1965 88 1906 29 1927.50 19 82 1934 29.53 19 80 1905, 72.52 19 87 1910 04,.47 1975 86 1910 29 1942.43 1936 83 19 1908.47 1906 88 1947 05, 43.47 1937 27 88 19 1.37 1962 28 91 19 28 19.48 1951 29 88 19 27 1954.42 10, 55 85 29 19. 1940 14
EXTREME VALUES SINCE 1889 Extreme Data For Corvallis, Oregon May Date Max. 73 Min. 66 Precip. 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19 27 28 29 85 86 84 82 85 84 90 88 84 89 88 91 95 91 82 86 88 92 88 92 92 90 92 91 91 88 85 88 90 93 1947 1946 1944 1944 19 1953 1905 1906 1940 1, 71 1949, 70, 19 1956 1956 1963 1963 1963 19 1947 19 1928 02, 36, 19 19 19 28 29 32 28 32 33 33 33 35 34 34 33 32 33 36 33 33 35 34 19 1964 1964 1952 1970 19 08, 19 1916 1977 58, 64 19 1976-09, 76 1927 1975 09, 55 19 09, 35, 19 19, 54, 14, 76, 76 19 1919 1.03.51 1.10 2. 1. 1.58 1..68.59.90.43.53.90.69.69.70..94.70.46.77.64.66.33.67 1.64...68.53.93 1949 19 1975 19 19 1963 1963 1916 1937 1905 1945 1902 06, 1901 1969 1953 1971 1953 1958 1932 1943 1956 36
EXTREME VALUES SINCE 1889 Extreme Data for Corvallis, Oregon June Date Max. 67 Min. 56, 61 Precip. 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19, 27 28 29 95 93 94 90 96 96 91 95 94 96 94 91 90 97 97 91 92 92 96 102 101 95 91 95 100 100 1970 1970 1950 35, 69 1935 1935 1903 1948 1940 1940 1916 1961 1966 1966 61, 69 61, 69 45, 46, 1902 1973, 58 19 19 19 1907 18, 37 1942 32 39 35 33 34 37 37 39 35 33 39 37 35 35 36 35 39 37 32 40 37 40 1929 1976 1976 1950 09, 53 1918 1961 1919 19 1946 1956 1976 71, 73 1952 19 19 19 08, 19 19 19 1901 1965 19, 71 1919 19, 27,.44..51.58..54.65 1.68.63.34.94.70.43.55 1.03.44 1.32.45 1.06.69.68.80.76. 1.02.48.52.52 2.14.50 1947 1947 19 1977 1959 1953 1927 1954 19 1910 19 19 1936 1906 1903 19 1937 1937 1910 1943 19 1969 19 1971 19 1969 1952 1916 16
EXTREME VALUES SINCE 1889 Extreme Data for Corvallis, Oregon July Date Max. Min. Leg:2z 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19 27 28 29 101 104 95 94 97 100 102 100 100 102 103 106 103 102 104 104 107 104 101 102 102 101 104 97 103 102 101 1942 1942 19 1967, 72 19 19 1905 19 19 1961 1961 1935 17, 19 19 08, 59, 19 1946 19 1928 1928 1928 1958 19 1907 59, 65 72 40 36 39 40 40 40 39 39 43 42 40 43 40 42 42 42 43 42 42 42 42 44 1919 1910 18, 19 1919 1902,, 64, 43 19, 1904 1952 09, 10 19,, 19 19 1910 01,, 01, 66 19, 57 1970 1956 45, 69 1956 53, 73.69.47.50..34.81..57.87.19..06..29.49 1.08.43.17.16...02.08..02.42.47 1.75.32.07.08 1902 1902 19 1976 1961 19 1946 1954 1936 19 19 1904 04, 1916 1950 1934 1965 1919 19 1947 1947 1947 1975 1947 1937 17
EXTREME VALUES SINCE 1889 Extreme Data for Corvallis, Oregon August Date Max. Min. Pre 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19 27 28 29 101 101 100 103 105 100 102 101 103 104 102 100 100 97 96 100 96 1965 01, 52 1932, 39 19 1967 1971 1977 1977 1942 1942 19, 27 40, 77 1940 1951 1951 1950 1942 1918 1918 1935 1935 19 44, 67 1918 1918 43 43 43 42 42 43 42 40 42 42 40 39 37 35 39 40 39 39 39 37 10,,, 55 1950 1903 19 19 1903 08, 59 10, 18 27, 55 19 1973, 52 1973 1973 1973 1910, 19 1907 37, 69.07.28.46.42.35..28..33.09.55.43.06..45.67.57.70.47.28.32.55. 1.35 1.29.83.62.54.95..69 1964 1956 1947 1933 1943 1976 1907 1907 1932 1932 19 1965 19 1976 19 19 1976 19 1943 19 1953 19 1975 1943 19 18
EXTREME VALUES SINCE 1889 Extreme Data for Corvallis, Oregon September Date Max. Min. Precip. 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19 27 28 29 95 97 93 103 97 97 101 96 94 95 92 92 94 95 95 95 95 97 97 92 94 92 87 89 1905 1934 1935 18, 35 1944 1958 44, 58 44, 48 1944 19 19 1951 1937 1967 1967 18, 51, 18, 62 47, 52, 47, 52 43, 52 1949 1967 1967 1932 1975 62 74 37 40 40 37 39 36 36 34 33 34 35 33 35 34 37 37 35 35 27 32 32 34 32 01, 14, 1936, 69 1954 1954 14, 1910 1927, 64 1952 1952 19 19 19 1970 19 19 19 06,, 58, 55, 64 1904 58, 61 1902 1961 1903, 73 1.89.59.32 1..54.46.59.71.65.62 1. 1.57.95 1.28 1..72. 2.18 1.00.54 1.52.54.76 1..34.86 1.29.77.62. 19 1971 19 19 19 27, 76 19 1949 19 19 1906 19 1935 1946 1969 19 1970 1944 19 01, 05 19 19 19
EXTREME VALUES SINCE 1889 Extreme Data for Corvallis, Oregon October Date Max. Min. Preci 1 2 89 86 1970 1952 33 03,, 1954 50 1.14.78 1951 3 90 1932 1916 1.81 1967 4 87 1932 1916.92 5 85 1952 33.97 1950 6 86 1952, 37.81 1905 7 87 1952 29 1970 1. 19 8 9 87 90 1976 1936 16, 61 19. 1.77 62, 69 10 89 34, 36 1.56 1953 90 1936 19.85 1948 82 1901 34 19 1.28 79 1937 1966.96 1908 14 80 1961, 66 1.08 1908 16 80 82 29, 52, 1936 61 29 1933, 46 1.56 1. 1947 1918 17 83 1936 49, 64.80 1947 18 80 36, 40 27 1949 1.09 1947-19 83 1940 29 1905 1.55 76 19 27 1949 1.76 1946 79 1937 1933 1.39 1934. 79 29, 37 29 1928 1. 19 83 1929 29 1916 1.84 1951 77 1929 28 1945 1.71 1940 74 75 1904 1944 27 16, 54, 1954 71.67 1. 19 19 27 70 1944 27 1954 1. 1950 28 29 72 70, 37, 19 44 1971 1971 1.32 2. 1950 70 1971 1. 73 1949 29, 27.75 1901
EXTREME VALUES SINCE 1889 Extreme Data For Corvallis, Oregon November* Date Max. Min. 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19 27 28 29 72 70 72 69 66 67 70 66 68 67 70 68 66 64 66 67 68 64 68 68 68 64 65 67 67 63 63 68 1954 1970 27, 75 01, 08, 08, 49 1958 19 1907 19 1907 06, 74 49, 54 06, 49 1919 1919 1976 19, 32 1966 1966 1933 1936 1947 1947 1949 40, 47 1928 1907 75 19 16 14 16 19 18 1935 1936 1935 1935 36, 77 1959 19 16, 36, 55 1916 29, 77 61, 77 19 19 1952 1952 1952 1952 1952 1936 1952 56, 69, 76 1.50 1.88 1.48 1.47 2.00 1. 2.36 1.88 2.37 1.48 1. 1.70 2.76 1.55 1.86 2. 1.91 1.70 1.78 3.16 1.18 2.37 1.80 2. 2.00 2.56 1.72 1. 2. 1.36 1944 1906 1910 1903 1906 1964 19 1928 19 1965 19 1942 19 1973 1954 1946 55, 19 1973 1961 19 1907 1977 1962 1945 19 1902 58 * November 1973 was the wettest November on record with 18.28 inches. Thus November 1973 is the absolute wettest month.
EXTREMEVALUES SINCE 1889 Extreme Data For Corvallis, Oregon December* Date Max. Min. 1 2 3 4 5 6 7 8 9 10 14 16 17 18 19 27 28 29 65 62 63 63 59 58 63 62 59 65 62 61 58 59 58 58 61 59 61 66 61 58 63 66 63 61 1958 1958 1954 06, 44 19 19 19 1942 19 19 1969 06, 17,, 19 1964 55, 64 1950 1950 1967 1958-7 -6 1-4 -14-14.5-10 -5 10 10 5 6 5-3 -2-8 -5 8 10 1956 1956 1906 06, 72 1919 1919 1919 1919 1919 1964 19 16,, 1.65 3.58 1. 2.00 2.05 2.78 1.47 1.43 1.68 2.16 1.44 2.37 1.77 2.09 1.02 1. 1.82 2.42 1.42 1.84 2.18 1.96 1.69 1.16 1.90 1.63 2.16 2.02 2.52 1. 1.89 1975 19 19 1975 1933 1973 1901 19 1929 1969 1929 19 19 1929 19 1964 1964 1932 1965 1907 1937 1965 1937 1970 * December 1976 was driest December of record with a total of 1.47.
Weekly Mean Soil Temperatures Average (1961 to and 1970 to 1978) For Woodburn Silty Clay Loam Soil 2 inch 4 inch 8 inch inch 40 inch Month, Week Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Jan. 1.0 36.6 39.7 37.2.9 37.4.7 40.7 48.6 48.3 2 40.9 36.6 40.4.0 39.5 37.9.6 40.7 48.3 48.0 3 44.5 40.3 42.9 40.1.5 39.6.5 40.5 47.5 47.3 4 42.0 37.3.0 35.7 39.9.6.5 40.9 47.0 46.9 5* 44.2 37.2.3.0 39.8 37.6 42.7 39.4 46.7 46.4 Feb. 1 44.3.3 42.3.9.0 39.3.7 40.9 47.0 46.8 2 47.0 39.2 44.5 40.4 42.5 40.4 42.0 40.9 47.1 46.9 3 48.5 40.2 44.8.3 43.9.9 42.9 42.1 47.4 47.1 4 48.1 39.4 45.8 40.8 43.4 40.7 43.1 42.4 47.5 47.4 Mar. 1 48.1 39.4 45.9 40.4 43.4 40.8 43.9 42.6 47.5 47.4 2 50.6 40.2 47.2.3 44.7.8 44.7 42.8 47.5 47.5 3 53.8.6 49.4 42.3 46.7 43.7 45.0 43.8 47.9 47.7 4 54.4 39.8 50.1 43.6 47.2 44.2 46.1 44.8 48.4 48.2 5* 56.4 45.2 50.9 44.2 48.2 44.9 47.0 46.0 48.9 48.6 Apr. 1 58.3 43.4 54.7 45.3 51.2 46.2 46.7 46.3 49.7 49.2 2 59.3 44.7 55.0 46.0 50.8 46.6 48.1 47.4 50.4 50.2 3 59.9 45.1 56.1 46.2 51.1 47.8 48.9 48.2 51.4 50.7 4 63.5 46.7 57.7 48.4 54.1 49.5 49.3 48.9 51.6 51.3 5* 61.2 45.8 58.0 47.3 52.5 48.7 48.5 47.9 51.7 51.5 May 1 65.5 48.5.6 50.6 56.9 51.8 51.6 50.8 52.5 52.2 2 69.5 51.2 63.8 53.0 59.4 54.5 54.2 52.9 53.6 53.3 3 71.6 52.4 66.2 54.8 61.4 55.8 55.5 55.0 54.9 54.5 4 74.3 53.8 68.7 55.9 63.3 58.0 57.4 56.6 56.0 55.8 5* 78.5 50.8 72.8 59.3 65.5.7 58.2 57.6 56.9 56.8 Jun. 1 75.6 55.9 70.0 58.9 65.6.5 59.7 58.7 58.2 57.9 2 79.9 59.1 73.9.8 68.6 62.7 61.0.0 59.6 59.3 3 80.8.4 75.4 62.6 70.0 64.5 62.7 61.4.7.4 4 82.0.4 76.1 63.3 70.8 65.1 64.1 63.1 62.0 61.7 5* 83.2 62.1 77.9 63.4 71.9 66.7 65.7 65.7 62.8 62.7 Jul. 1 83.4 61.6 77.3 55.2 72.1 66.2 65.2 64.7 63.2 62.9 2 85.9 63.4 80.0 66.2 74.4 68.3 65.9 65.0 64.1 63.9 3 88.5 65.1 81.9 67.9 76.2 70.2 68.1 67.3 65.1 64.8 4 89.7 67.1 83.3 68.9 77.1 71.3 68.4 67.2 66.1 65.9 5* 88.8 64.7 82.7 68.5 77.0 70.9 67.6 67.2 65.7 65.6 Aug. 1 90.3 66.6 83.2 70.1 76.7 71.6 70.5 69.4 67.3 67.1 2 88.7 66.2 81.9 69.4 76.8 71.5 69.7 69.4 68.1 67.9 3 86.6 65.0 80.3 68.0 75.5 70.4 70.0 69.2 68.5 68.3 4 83.3 63.4 77.0 66.5 73.6 68.8 69.5 68.8 68.7 68.5 5* 81.6.5 76.9 65.1 72.2 52.5 69.3 68.7 68.8 68.5
Weekly Mean Soil Temperatures Average (1961 to and 1970 to 1978) For Woodburn Silty Clay Loam Soil 2 inch 4 inch 8 inch inch 40 inch Month, Week Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Sept. 1 81.3 61.1 76.5 64.4 71.3 66.7 68.0 67.3 68.2 68.0 2 73.3 58.5 73.1 61.9 68.8 64.4 66.5 66.0 68.1 67.9 3 74.8 57.4 70.6 59.8 66.8 63.1 65.3 64.7 67.4 67.3 4 73.7 56.4 68.8 54.5 69.5 61.3 64.0 63.3 66.8 66.6 5* 69.8 54.0 65.5 55.9 61.9 58.5.0 59.7 66.0 66.0 Oct. 1 69.2 53.5 65.5 55.6 64.7 58.6 62.0 61.5 65.7 65.4 2 63.4 51.0.9 54.5 58.4 55.3.0 59.3 63.7 63.5 3 61.1 48.3 57.8 51.0 55.6 51.9 57.6 56.9 63.0 62.6 4 56.1 48.9 54.0 49.7 52.6 47.5 55.4 54.9 61.4 61.2 5* 55.5 46.5 53.9 48.8 50.5 50.0 54.9 54.4.8.6 Nov. 1 53.1 44.5 51.1 47.0 49.9 47.8 52.8 52.3 59.6 59.2 2 51.1 44.2 49.3 45.3 48.8 46.6 50.8 50.3 58.0 57.6 3 48.1 42.1 47.4 44.4 46.6 44.9 49.6 49.1 56.8 56.5 4 46.6 40.8 45.4 42.4 44.8 43.0 48.4 48.0 55.3 54.5 5* 46.9 42.4 45.9 43.5 45.4 43.9 49.6 49.0 54.4 54.1 Dec. 1 45.0 40.5 46.0.7 43.0.5 46.5 45.5 53.2 52.9 2 42.6.4 45.1 40.4 44.7 40.3 45.2 44.5 52.2 52.0 3 43.2 39.3 42.1 39.9.6 40.2 43.4 42.7 50.8 50.6 4 43.2.9 42.3 40.4.5 40.3 43.3 42.6 50.5 50.3 5* 42.2.6 40.0.0.9 37.7 39.1 39.0 50.9 50.8 * Average of only three to eight years data.