MODESTO, CALIFORNIA

Period of Record General Climate Summary - Cooling Degree Days

Station:(045738) MODESTO
From Year=1931 To Year=2006
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	4	18	68	171	354	519	682	633	504	277	41	4	3275
57	2	8	41	127	294	459	620	571	444	220	23	1	2812
60	0	2	16	73	212	370	527	478	355	144	8	0	2185
65	0	0	2	21	102	228	372	324	211	54	1	0	1315
70	0	0	0	4	39	114	222	177	95	13	0	0	665

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 Jul 28, 2006
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