WILLMAR RTC, MINNESOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(219004) WILLMAR CNTY HWY GAR
From Year=1893 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	1681	1399	1143	614	268	64	11	29	194	533	1030	1503	8468
60	1526	1258	988	471	159	22	1	6	104	389	880	1348	7152
57	1433	1173	895	389	108	10	0	2	65	310	790	1255	6431
55	1371	1117	834	337	81	5	0	1	46	262	730	1193	5976
50	1216	976	681	220	33	1	0	0	16	158	583	1038	4921

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