NATURAL BRG, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(025825) NATURAL BRIDGE
From Year=1893 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	743	594	522	306	111	12	0	1	13	164	462	695	3622
60	588	453	368	177	45	2	0	0	2	72	315	540	2562
57	495	368	281	115	25	1	0	0	0	39	233	447	2004
55	434	313	227	83	16	0	0	0	0	25	183	385	1665
50	283	185	114	31	4	0	0	0	0	7	85	239	949

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