UKIAH, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(358726) UKIAH
From Year=1922 To Year=2011
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1248	977	892	669	505	300	142	172	355	614	904	1157	7934
60	1093	836	737	520	353	172	54	71	219	460	754	1002	6269
57	1000	751	644	430	268	109	25	34	150	369	664	909	5352
55	938	694	582	372	215	75	13	19	112	310	604	847	4780
50	783	553	427	234	106	21	1	3	45	179	455	692	3498

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