PRESTON, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(107346) PRESTON
From Year=1964 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	1328	1101	880	601	349	145	20	25	212	563	925	1289	7437
60	1173	960	725	452	217	67	5	7	112	409	775	1134	6036
57	1080	875	632	366	154	37	2	3	72	320	685	1041	5267
55	1018	819	570	310	118	24	1	2	52	266	625	979	4783
50	863	678	418	186	52	5	0	0	20	149	475	824	3670

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