INTL FALLS INTL AP, MINNESOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(214026) INTERNL FALLS WSO ARPT
From Year=1906 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	1938	1588	1327	783	421	155	58	109	346	702	1177	1719	10324
60	1783	1447	1173	635	286	71	15	39	220	551	1027	1564	8809
57	1690	1362	1080	548	215	38	5	17	156	462	937	1471	7980
55	1628	1306	1018	490	173	24	2	9	120	405	877	1409	7459
50	1473	1165	863	355	88	5	0	1	53	274	728	1254	6258

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