PETERSONS RANCH, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(451760) PETERSONS RANCH
From Year=1953 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	2	20	92	188	347	343	214	52	1	0	1259
57	0	0	1	11	67	146	289	284	167	33	0	0	998
60	0	0	0	4	39	96	208	203	110	14	0	0	675
65	0	0	0	1	14	40	104	99	44	3	0	0	305
70	0	0	0	0	3	12	41	38	11	0	0	0	106

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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