WINCHESTER, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(109846) WINCHESTER
From Year=1965 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 4 8 28 98 264 440 677 682 433 178 32 4 2848
40 S 4 12 40 138 402 842 1519 2201 2634 2812 2844 2848 2848
45 M 0 1 6 41 146 295 522 527 293 88 9 0 1929
45 S 0 1 7 48 194 490 1012 1539 1832 1920 1929 1929 1929
50 M 0 0 1 13 68 169 369 374 173 35 1 0 1203
50 S 0 0 1 14 82 250 619 994 1167 1202 1203 1203 1203
55 M 0 0 0 3 25 78 228 232 83 10 0 0 660
55 S 0 0 0 3 28 106 334 566 650 660 660 660 660
60 M 0 0 0 0 7 26 114 117 30 2 0 0 296
60 S 0 0 0 0 7 34 147 264 294 296 296 296 296
Corn Growing Degree Days
50 M 1 5 20 68 162 259 433 439 286 122 16 1 1812
50 S 1 6 27 95 256 515 948 1387 1673 1795 1811 1812 1812
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