RIGGINS, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(107706) RIGGINS
From Year=1940 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	936	703	591	372	193	63	6	8	83	328	670	903	4855
60	781	562	437	236	96	19	1	2	32	197	520	748	3631
57	688	477	346	166	55	8	0	0	15	132	431	655	2974
55	626	420	288	125	36	4	0	0	8	96	372	593	2568
50	471	283	158	48	8	0	0	0	1	35	232	438	1675

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