SAN SIMON, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(027560) SAN SIMON
From Year=1898 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	658	485	368	154	32	1	0	0	2	103	414	659	2876
60	503	345	224	64	8	0	0	0	0	40	271	504	1959
57	410	262	151	33	3	0	0	0	0	22	193	411	1485
55	349	210	110	20	2	0	0	0	0	14	147	350	1203
50	204	102	41	4	0	0	0	0	0	4	63	205	623

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