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Period of Record General Climate Summary - Cooling Degree Days

Station:(213411) GULL LAKE DAM
From Year=1911 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	0	13	108	294	455	381	143	24	0	0	1418
57	0	0	0	9	80	240	393	321	109	15	0	0	1167
60	0	0	0	4	47	168	303	235	68	7	0	0	833
65	0	0	0	1	16	75	166	115	26	1	0	0	400
70	0	0	0	0	4	23	65	40	8	0	0	0	141

Cooling 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.
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