WILLOW SPRINGS RCH, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(029382) WILLOW SPRINGS RANCH
From Year=1943 To Year=1978
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	614	489	394	182	52	2	0	0	7	89	348	587	2765
60	460	350	253	89	18	0	0	0	2	38	216	433	1858
57	369	271	180	53	8	0	0	0	1	22	151	341	1395
55	309	223	138	36	5	0	0	0	0	14	115	283	1122
50	175	120	62	12	1	0	0	0	0	4	51	154	579

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