ONTONAGON 6 SE, MICHIGAN

Period of Record General Climate Summary - Growing Degree Days

Station:(206220) ONTONAGON 6 SE
From Year=1977 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 3 33 143 429 666 842 817 548 232 43 1 3758
40 S 0 3 36 179 608 1274 2117 2934 3481 3714 3756 3758 3758
45 M 0 1 15 78 292 517 687 662 400 132 18 0 2801
45 S 0 1 15 93 385 902 1589 2252 2652 2783 2801 2801 2801
50 M 0 0 6 40 180 372 532 508 266 66 6 0 1975
50 S 0 0 6 46 226 597 1129 1637 1903 1970 1975 1975 1975
55 M 0 0 2 18 99 240 379 354 158 29 2 0 1281
55 S 0 0 2 20 120 359 738 1092 1250 1279 1281 1281 1281
60 M 0 0 1 7 48 133 236 213 81 11 0 0 729
60 S 0 0 1 8 56 189 425 638 719 729 729 729 729
Corn Growing Degree Days
50 M 0 3 23 102 277 419 540 522 325 131 24 1 2368
50 S 0 3 26 128 405 824 1364 1887 2212 2343 2367 2368 2368
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