WELLPINIT, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(459058) WELLPINIT
From Year=1923 To Year=2007
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1215	956	824	561	358	151	44	49	219	559	909	1185	7030
60	1060	815	669	414	222	68	13	15	118	406	759	1030	5589
57	967	730	576	328	152	37	4	6	73	319	669	937	4799
55	905	674	514	273	113	22	2	3	49	264	609	875	4302
50	750	532	360	149	42	5	0	0	14	144	459	720	3176

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