UMATILLA, OREGON

Period of Record General Climate Summary - Cooling Degree Days

Station:(358734) UMATILLA
From Year=1892 To Year=1965
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	5	62	223	418	652	586	300	59	1	0	2307
57	0	0	2	40	172	358	590	524	245	36	0	0	1969
60	0	0	0	19	109	272	497	432	169	15	0	0	1513
65	0	0	0	4	41	146	344	281	73	2	0	0	891
70	0	0	0	0	11	61	205	151	22	0	0	0	449

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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