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Period of Record General Climate Summary - Growing Degree Days

Station:(473756) HORICON
From Year=1970 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	1	3	56	223	540	800	963	889	622	298	66	5	4466
40 S	1	3	59	282	822	1622	2585	3475	4096	4394	4460	4466	4466
45 M	0	1	28	130	391	650	808	734	473	181	28	2	3426
45 S	0	1	28	158	550	1199	2008	2742	3216	3396	3424	3426	3426
50 M	0	0	13	69	256	500	653	579	332	97	10	1	2510
50 S	0	0	13	81	337	838	1491	2071	2402	2499	2509	2510	2510
55 M	0	0	5	32	148	354	498	425	207	44	3	0	1716
55 S	0	0	5	37	185	539	1038	1462	1670	1714	1716	1716	1716
60 M	0	0	2	13	75	220	345	275	111	17	0	0	1058
60 S	0	0	2	15	90	311	655	930	1041	1058	1058	1058	1058

Corn Growing Degree Days
50 M	0	2	35	136	319	507	639	577	378	174	35	3	2805
50 S	0	2	37	173	492	999	1638	2215	2593	2767	2802	2805	2805

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