GRANGEVILLE, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(103771) GRANGEVILLE
From Year=1893 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	1114	908	840	612	414	222	56	65	248	550	857	1070	6956
60	959	767	685	463	274	114	17	20	139	399	707	915	5459
57	866	682	592	376	200	67	6	8	90	312	617	822	4638
55	804	626	530	320	156	43	3	4	65	258	557	760	4125
50	649	485	377	193	70	10	0	0	23	141	409	605	2964

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