WALNUT CANYON NATL M, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(029156) WALNUT CANYON NATL MONU
From Year=1910 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1019	869	717	530	272	73	3	13	122	457	718	1019	5811
60	864	728	562	381	155	22	0	1	43	307	568	864	4495
57	771	643	470	296	103	8	0	0	19	223	479	771	3782
55	709	586	409	242	76	4	0	0	10	173	419	709	3337
50	554	445	266	129	31	0	0	0	2	78	278	554	2336

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. 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