PULLMAN 2 NW, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456789) PULLMAN 2 NW
From Year=1940 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	1117	879	804	579	382	208	69	70	216	512	836	1070	6743
60	962	737	649	432	245	101	19	21	115	364	686	915	5247
57	869	653	556	346	173	55	7	8	70	282	596	822	4436
55	807	596	495	291	131	33	3	3	48	230	537	760	3933
50	652	455	343	166	52	5	0	0	14	122	389	606	2804

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