MACKAY RANGER STN, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(105462) MACKAY RANGER STN
From Year=1931 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 0 0 14 117 334 546 812 759 479 199 12 0 3272
40 S 0 0 14 131 465 1011 1824 2583 3061 3260 3272 3272 3272
45 M 0 0 3 48 203 398 657 604 335 98 2 0 2349
45 S 0 0 3 51 254 653 1310 1914 2249 2347 2349 2349 2349
50 M 0 0 0 14 101 260 503 450 204 35 0 0 1566
50 S 0 0 0 14 115 375 877 1327 1531 1566 1566 1566 1566
55 M 0 0 0 2 36 143 350 299 98 7 0 0 935
55 S 0 0 0 2 39 182 532 830 928 935 935 935 935
60 M 0 0 0 0 8 60 205 160 30 0 0 0 464
60 S 0 0 0 0 8 68 273 433 464 464 464 464 464
Corn Growing Degree Days
50 M 0 1 18 106 239 361 524 499 351 173 19 0 2292
50 S 0 1 19 125 363 725 1249 1749 2100 2273 2292 2292 2292
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 Jul 28, 2006
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