STARTUP 1 E, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458034) STARTUP 1 E
From Year=1924 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	802	639	616	457	308	175	82	76	181	406	613	772	5126
60	647	498	462	311	173	68	16	14	70	257	463	617	3595
57	554	413	370	230	105	28	4	3	30	176	374	524	2811
55	493	357	310	179	70	13	1	1	14	128	316	462	2343
50	341	222	169	73	15	1	0	0	1	45	181	309	1358

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