FOREST GROVE, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(352997) FOREST GROVE
From Year=1893 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	827	656	601	440	282	136	45	40	127	376	617	788	4934
60	672	515	446	295	155	47	7	6	46	230	467	633	3518
57	579	430	353	213	94	17	1	1	20	152	377	540	2779
55	517	374	293	164	61	7	0	0	10	108	318	478	2331
50	364	237	154	65	12	0	0	0	1	35	181	326	1375

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