GRASMERE, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(103809) GRASMERE
From Year=1953 To Year=1974
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1170	942	932	676	403	188	31	55	236	534	861	1106	7135
60	1015	800	777	526	265	100	8	22	135	383	711	951	5694
57	922	715	684	437	192	61	3	12	91	299	621	858	4896
55	860	659	623	379	151	41	2	7	68	248	561	796	4393
50	705	517	469	244	71	10	0	1	29	143	412	641	3243

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