NEWHALEM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455840) NEWHALEM
From Year=1959 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	922	753	710	514	333	185	81	72	176	461	721	904	5832
60	767	612	555	366	200	84	24	18	79	309	571	749	4334
57	674	527	462	282	132	42	8	5	40	224	481	656	3532
55	612	470	400	229	94	22	3	2	22	172	421	594	3041
50	457	329	250	112	28	1	0	0	3	68	273	439	1960

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