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Period of Record General Climate Summary - Cooling Degree Days

Station:(216654) PRESTON
From Year=1952 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	4	31	143	348	500	420	193	46	2	0	1687
57	0	0	3	22	110	293	439	360	153	32	1	0	1411
60	0	0	1	12	70	216	347	273	102	17	0	0	1039
65	0	0	0	4	28	110	205	146	46	5	0	0	544
70	0	0	0	1	8	41	94	57	15	1	0	0	218

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