BLACK RIVER PUMPS, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(020808) BLACK RIVER PUMPS
From Year=1948 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	929	768	712	467	226	36	1	5	63	325	672	912	5116
60	774	626	557	320	112	8	0	0	16	189	522	757	3881
57	681	542	464	237	66	2	0	0	5	124	432	664	3219
55	619	485	403	188	45	1	0	0	2	91	373	602	2809
50	464	345	259	91	15	0	0	0	0	37	233	447	1893

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 Jul 28, 2006
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