RICHARDSON, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457010) RICHARDSON 3 SE LOPEZ
From Year=1949 To Year=1958
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	740	640	652	500	342	268	192	189	221	392	569	675	5380
60	585	499	497	350	192	125	62	50	90	237	419	520	3625
57	492	415	404	260	111	56	16	8	35	147	329	427	2699
55	430	359	342	201	65	23	4	1	15	95	270	365	2169
50	276	219	188	70	6	1	0	0	0	16	134	211	1120

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