CHELAN, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(454430) LAKESIDE
From Year=1891 To Year=1958
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	0	26	160	326	565	533	237	30	0	0	1877
57	0	0	0	15	117	269	503	471	187	17	0	0	1579
60	0	0	0	6	67	189	411	380	120	6	0	0	1178
65	0	0	0	1	21	85	263	234	44	0	0	0	648
70	0	0	0	0	4	29	137	115	10	0	0	0	296

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