INTL FALLS INTL AP, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(214026) INTERNL FALLS WSO ARPT
From Year=1906 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 0 0 9 102 376 640 813 727 421 156 12 0 3257
40 S 0 0 9 111 487 1128 1940 2667 3088 3245 3257 3257 3257
45 M 0 0 3 50 246 491 658 572 285 83 4 0 2391
45 S 0 0 3 54 299 790 1448 2020 2305 2388 2391 2391 2391
50 M 0 0 1 22 143 346 503 418 170 37 1 0 1640
50 S 0 0 1 23 166 511 1014 1432 1602 1639 1640 1640 1640
55 M 0 0 0 8 72 214 350 271 88 13 0 0 1015
55 S 0 0 0 8 80 294 644 914 1002 1015 1015 1015 1015
60 M 0 0 0 2 30 111 208 146 38 4 0 0 539
60 S 0 0 0 3 33 144 351 497 535 539 539 539 539
Corn Growing Degree Days
50 M 0 0 8 79 241 390 513 451 250 95 8 0 2034
50 S 0 0 8 86 327 717 1230 1681 1931 2026 2034 2034 2034
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