BIRD ISLAND, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(210783) BIRD ISLAND
From Year=1893 To Year=1976
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 1 33 216 556 813 993 925 631 320 40 1 4530
40 S 0 2 35 251 807 1620 2613 3538 4169 4489 4529 4530 4530
45 M 0 0 14 128 409 663 838 770 484 206 15 0 3526
45 S 0 0 14 142 551 1214 2052 2822 3305 3511 3526 3526 3526
50 M 0 0 5 67 275 514 683 615 344 116 4 0 2623
50 S 0 0 5 73 348 861 1544 2159 2503 2619 2623 2623 2623
55 M 0 0 2 30 165 369 528 460 221 54 1 0 1830
55 S 0 0 2 32 197 565 1093 1554 1775 1829 1830 1830 1830
60 M 0 0 0 10 86 235 374 311 124 20 0 0 1161
60 S 0 0 0 11 97 332 706 1016 1140 1161 1161 1161 1161
Corn Growing Degree Days
50 M 0 1 26 142 340 516 656 604 388 199 28 1 2901
50 S 0 2 27 169 509 1025 1681 2285 2673 2872 2900 2901 2901
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