HATFIELD, WISCONSIN

Period of Record General Climate Summary - Growing Degree Days

Station:(473471) HATFIELD DAM
From Year=1908 To Year=2009
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	1	33	197	516	764	932	865	587	288	42	2	4228
40 S	0	1	35	232	748	1512	2444	3309	3896	4184	4226	4228	4228
45 M	0	0	15	113	370	614	777	710	441	176	16	1	3233
45 S	0	0	15	128	498	1112	1889	2599	3040	3216	3232	3233	3233
50 M	0	0	6	58	240	465	622	555	304	94	5	0	2350
50 S	0	0	6	64	304	769	1391	1946	2250	2345	2350	2350	2350
55 M	0	0	2	26	139	322	467	402	187	42	1	0	1587
55 S	0	0	2	28	167	488	955	1357	1544	1586	1587	1587	1587
60 M	0	0	0	10	69	195	315	257	100	14	0	0	961
60 S	0	0	0	10	80	275	590	847	947	961	961	961	961

Corn Growing Degree Days
50 M	0	2	31	154	345	496	610	566	380	195	32	1	2813
50 S	0	2	33	187	532	1029	1639	2205	2585	2780	2811	2813	2813

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