MT LEMMON, ARIZONA

Period of Record General Climate Summary - Heating Degree Days

Station:(025733) MOUNT LEMMON
From Year=1950 To Year=1956
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	895	820	839	619	347	128	71	84	110	302	628	883	5725
60	740	679	684	469	205	50	14	12	33	157	478	728	4247
57	647	594	591	379	136	23	3	2	8	93	388	635	3498
55	585	538	529	320	100	11	1	0	1	65	329	573	3050
50	430	397	376	181	45	1	0	0	0	25	195	421	2071

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