date! ,

Period of Record General Climate Summary - Growing Degree Days

Station:(476718) PORTAGE
From Year=1889 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	52	248	581	837	1009	934	662	348	72	5	4753
40 S	1	4	55	304	884	1722	2731	3665	4327	4675	4748	4753	4753
45 M	0	1	24	150	430	687	854	779	513	225	32	1	3698
45 S	0	1	25	175	606	1293	2147	2927	3440	3665	3697	3698	3698
50 M	0	0	11	82	292	538	699	624	370	128	11	0	2756
50 S	0	0	11	93	385	923	1622	2246	2617	2744	2756	2756	2756
55 M	0	0	4	39	177	391	544	470	241	62	3	0	1931
55 S	0	0	4	44	220	611	1155	1625	1866	1928	1931	1931	1931
60 M	0	0	1	16	93	254	390	319	138	24	1	0	1236
60 S	0	0	1	18	110	364	755	1073	1211	1236	1236	1236	1236

Corn Growing Degree Days
50 M	0	2	34	154	354	540	674	617	409	202	38	2	3027
50 S	0	2	36	191	545	1085	1759	2376	2785	2987	3025	3027	3027

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