WAPATO, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458959) WAPATO
From Year=1915 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	1063	780	612	375	179	54	9	12	93	391	754	1021	5342
60	908	639	457	238	84	13	1	1	33	247	604	866	4091
57	815	554	366	166	45	4	0	0	14	171	514	773	3423
55	753	498	307	124	28	1	0	0	8	127	455	711	3011
50	598	358	171	45	4	0	0	0	1	48	310	557	2093

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