PLAIN, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456534) PLAIN
From Year=1937 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	1205	944	851	613	396	209	76	89	253	590	910	1164	7300
60	1050	803	696	464	251	99	22	26	131	435	760	1009	5745
57	957	718	603	375	173	51	8	10	77	345	670	916	4903
55	895	662	541	316	128	30	3	5	51	287	610	854	4382
50	740	521	387	179	47	4	0	1	12	157	460	699	3207

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