CHESAW, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451381) CHESAW
From Year=1917 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	1431	1153	1001	652	426	257	102	120	313	673	1060	1337	8525
60	1276	1012	846	503	281	135	33	42	188	518	910	1182	6925
57	1183	927	753	414	201	77	13	17	127	427	820	1089	6048
55	1121	870	691	356	154	49	6	9	94	368	760	1027	5503
50	966	729	536	219	63	10	1	1	38	232	610	872	4275

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