HATTON 9 SE, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453546) HATTON 9 SE
From Year=1905 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	1115	837	676	451	246	88	14	22	135	446	791	1048	5869
60	960	696	521	307	131	28	2	4	58	299	641	893	4542
57	867	611	429	228	79	10	0	1	31	220	551	800	3826
55	805	555	368	179	52	4	0	0	19	172	492	738	3384
50	650	415	225	80	12	0	0	0	4	80	345	583	2395

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