RIDDLE, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(357169) RIDDLE 2 NNE
From Year=1899 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	721	564	528	398	256	103	21	22	101	310	535	714	4273
60	566	422	373	254	131	31	2	2	33	172	385	559	2931
57	473	338	283	176	74	11	0	0	13	106	298	466	2239
55	412	283	227	130	46	4	0	0	6	71	241	405	1825
50	262	155	105	44	8	0	0	0	0	19	119	257	969

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