SEQUIM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457538) SEQUIM
From Year=1931 To Year=1980
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	836	678	673	518	367	228	148	131	217	445	643	771	5657
60	681	537	518	368	218	97	39	27	91	291	493	616	3977
57	588	452	425	279	137	40	9	5	40	202	403	523	3105
55	526	396	363	221	90	17	3	1	20	148	344	461	2591
50	372	256	211	92	18	1	0	0	2	49	198	307	1506

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