COEUR D ALENE, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(101956) COEUR D ALENE 1 E
From Year=1895 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 5 8 53 201 458 647 900 882 583 284 42 10 4073
40 S 5 13 67 268 726 1373 2273 3155 3737 4021 4063 4073 4073
45 M 1 1 12 96 308 497 745 727 434 155 9 1 2986
45 S 1 1 14 110 418 915 1660 2387 2821 2976 2985 2986 2986
50 M 0 0 1 37 178 349 590 572 292 64 1 0 2085
50 S 0 0 1 38 216 565 1155 1727 2019 2084 2085 2085 2085
55 M 0 0 0 10 85 211 435 418 168 19 0 0 1347
55 S 0 0 0 11 95 307 742 1160 1328 1347 1347 1347 1347
60 M 0 0 0 2 31 105 286 270 77 3 0 0 774
60 S 0 0 0 2 33 138 424 693 770 774 774 774 774
Corn Growing Degree Days
50 M 1 4 38 133 279 388 562 551 362 171 13 1 2504
50 S 1 5 43 176 456 844 1405 1956 2318 2489 2502 2504 2504
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