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Period of Record General Climate Summary - Heating Degree Days

Station:(219072) WINONA DAM 5 A
From Year=1939 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1489	1226	1000	517	235	42	6	13	138	442	865	1288	7261
60	1334	1084	847	377	127	12	0	2	64	304	715	1133	6000
57	1241	999	756	300	78	5	0	0	36	229	626	1040	5312
55	1179	943	696	251	54	2	0	0	23	186	568	978	4881
50	1025	801	549	148	17	0	0	0	6	98	424	824	3893

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
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