TIDEWATER, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(358481) TIDEWATER FISH HATCHERY
From Year=1940 To Year=2002
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	689	534	534	424	305	178	77	62	108	282	509	664	4364
60	534	393	379	276	165	62	9	6	25	142	359	509	2858
57	441	309	288	193	96	21	1	1	6	78	270	416	2119
55	379	254	229	142	59	8	0	0	2	47	214	354	1690
50	232	130	103	46	10	0	0	0	0	9	97	209	837

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