CAIRO 3 N, ILLINOIS

Period of Record General Climate Summary - Growing Degree Days

Station:(111166) CAIRO 3 N
From Year=1948 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 70 108 295 584 892 1107 1248 1193 939 631 282 102 7451
40 S 70 178 473 1057 1949 3056 4304 5497 6437 7067 7349 7451 7451
45 M 34 53 187 440 737 957 1093 1038 789 478 175 50 6030
45 S 34 87 274 714 1451 2408 3501 4539 5329 5806 5981 6030 6030
50 M 14 23 106 306 582 807 938 883 639 333 95 22 4749
50 S 14 37 143 449 1031 1838 2776 3659 4299 4631 4727 4749 4749
55 M 5 7 52 192 429 657 783 728 490 208 43 8 3603
55 S 5 12 64 256 685 1342 2125 2854 3344 3552 3595 3603 3603
60 M 1 2 21 104 286 507 628 573 346 113 15 2 2599
60 S 1 3 24 129 414 921 1550 2123 2469 2582 2597 2599 2599
Corn Growing Degree Days
50 M 36 56 160 345 580 763 870 829 627 379 149 47 4842
50 S 36 93 253 598 1177 1941 2810 3640 4267 4646 4795 4842 4842
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