MOLALLA, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(355677) MOLALLA 1 NW
From Year=1935 To Year=1976
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	792	615	610	464	299	150	51	48	126	374	581	738	4847
60	637	474	455	315	162	52	5	6	39	226	432	583	3384
57	544	389	362	229	94	19	1	1	14	149	342	490	2633
55	482	334	301	175	59	8	0	0	7	105	284	429	2183
50	334	201	158	64	11	1	0	0	0	33	154	281	1237

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