TOLT SOUTH FORK RSVR, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(458508) TOLT SOUTH FORK RESER
From Year=1962 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	952	768	823	722	517	355	171	121	295	500	826	891	6939
60	797	627	668	572	367	218	74	46	177	354	676	736	5310
57	704	542	575	483	281	147	36	20	116	271	586	643	4402
55	642	486	513	424	228	107	18	10	80	217	526	581	3831
50	487	345	359	280	116	30	1	1	23	103	376	426	2545

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