GRAND CANYON NTL PRK, ARIZONA

Period of Record General Climate Summary - Cooling Degree Days

Station:(023595) GRAND CANYON NATL PARK
From Year=1957 To Year=1977
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	4	63	242	433	367	172	23	0	0	1304
57	0	0	0	1	36	191	371	306	124	11	0	0	1040
60	0	0	0	0	13	125	279	215	65	2	0	0	699
65	0	0	0	0	1	50	132	81	12	0	0	0	275
70	0	0	0	0	0	13	34	14	0	0	0	0	60

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