TOLT SOUTH FORK RSVR, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458508) TOLT SOUTH FORK RESER
From Year=1962 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 17 148 37 82 263 397 659 711 471 287 29 27 3126
40 S 17 165 202 283 546 943 1602 2313 2784 3071 3099 3126 3126
45 M 0 110 5 31 142 248 504 556 325 157 2 3 2084
45 S 0 111 116 147 288 536 1040 1597 1922 2079 2081 2084 2084
50 M 0 101 1 9 64 127 350 402 194 70 0 0 1316
50 S 0 101 102 110 174 301 651 1052 1246 1316 1316 1316 1316
55 M 0 100 0 3 21 53 212 256 101 30 0 0 775
55 S 0 100 100 102 123 176 388 644 745 775 775 775 775
60 M 0 99 0 0 5 15 113 137 48 11 0 0 428
60 S 0 99 99 99 104 118 232 369 416 428 428 428 428
Corn Growing Degree Days
50 M 3 121 11 32 130 168 388 406 230 111 5 2 1606
50 S 3 124 134 166 296 464 852 1257 1488 1598 1603 1606 1606
M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Western Regional Climate Center, wrcc@dri.edu