HECLA, WYOMING

Period of Record General Climate Summary - Growing Degree Days

Station:(484440) HECLA
From Year=1898 To Year=1979
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 0 10 108 268 551 768 737 -99 216 -99 13 -99
40 S 4 4 14 122 390 941 1710 2446 -99 -99 -99 -99 -99
45 M 0 0 1 50 142 402 613 582 -99 118 -99 1 -99
45 S 0 0 1 51 193 594 1207 1789 -99 -99 -99 -99 -99
50 M 0 0 0 15 57 259 458 427 -99 53 -99 0 -99
50 S 0 0 0 15 71 330 788 1214 -99 -99 -99 -99 -99
55 M 0 0 0 0 14 145 304 272 -99 18 -99 0 -99
55 S 0 0 0 0 14 158 462 733 -99 -99 -99 -99 -99
60 M 0 0 0 0 0 61 162 122 -99 4 -99 0 -99
60 S 0 0 0 0 0 61 223 345 -99 -99 -99 -99 -99
Corn Growing Degree Days
50 M 7 0 10 101 200 357 492 469 -99 190 -99 11 -99
50 S 7 7 17 118 318 674 1166 1635 -99 -99 -99 -99 -99
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