HECLA, WYOMING

Period of Record General Climate Summary - Heating Degree Days

Station:(484440) HECLA
From Year=1898 To Year=1979
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1164	1324	1173	729	526	213	63	63	-99	579	-99	1175	-99
60	1009	1184	1018	579	371	110	14	6	-99	429	-99	1020	-99
57	916	1100	925	489	282	66	3	0	-99	342	-99	927	-99
55	854	1044	863	429	230	44	0	0	-99	287	-99	865	-99
50	699	904	708	293	118	8	0	0	-99	168	-99	710	-99

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