WALLA WALLA WB CITY, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458931) WALLA WALLA WB CITY
From Year=1948 To Year=1987
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	973	696	582	375	184	50	5	7	84	343	673	893	4866
60	818	555	428	237	84	12	1	0	28	206	523	738	3631
57	726	471	338	162	44	3	0	0	13	137	435	645	2974
55	664	416	280	119	25	1	0	0	7	98	377	584	2570
50	516	284	148	38	3	0	0	0	1	34	243	435	1701

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 Jul 28, 2006
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