WINONA, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(219067) WINONA
From Year=1893 To Year=2011
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 1 3 52 271 606 873 1049 967 681 357 70 4 4935
40 S 1 4 56 327 933 1806 2855 3822 4503 4860 4930 4935 4935
45 M 0 1 24 170 455 723 894 812 532 234 32 1 3878
45 S 0 1 25 195 650 1373 2267 3079 3611 3844 3876 3878 3878
50 M 0 0 10 96 315 573 739 657 389 136 12 0 2926
50 S 0 0 10 106 421 994 1733 2390 2778 2914 2926 2926 2926
55 M 0 0 4 48 196 425 584 502 258 68 4 0 2088
55 S 0 0 4 52 248 673 1257 1759 2017 2085 2088 2088 2088
60 M 0 0 1 21 107 285 429 350 151 28 1 0 1372
60 S 0 0 1 22 129 414 843 1193 1343 1372 1372 1372 1372
Corn Growing Degree Days
50 M 0 2 34 164 366 565 706 642 420 207 39 2 3147
50 S 0 2 36 200 566 1131 1837 2479 2899 3105 3145 3147 3147
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