HARTLINE, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453529) HARTLINE
From Year=1948 To Year=2005
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1214	921	754	501	280	99	22	30	144	494	874	1163	6497
60	1059	780	599	355	157	35	5	7	68	345	724	1008	5142
57	966	695	506	271	100	15	1	3	38	261	634	915	4407
55	904	639	445	219	70	8	1	2	24	209	574	853	3947
50	749	497	294	107	21	1	0	2	6	102	425	698	2901

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