GRAND VALLEY, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(053508) GRAND VALLEY
From Year=1904 To Year=1981
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1255	930	742	480	242	48	1	4	115	459	817	1215	6308
60	1100	789	587	333	126	12	0	0	47	308	667	1060	5029
57	1007	704	495	249	77	5	0	0	26	227	577	967	4333
55	945	648	434	197	52	2	0	0	17	179	517	905	3895
50	790	507	285	95	17	0	0	0	5	88	368	750	2905

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