GRASS VALLEY NO 2, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(043573) GRASS VALLEY NO 2
From Year=1966 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	690	577	560	434	236	79	13	14	63	243	519	698	4127
60	535	436	406	291	128	29	2	2	22	127	370	543	2892
57	442	352	316	214	79	14	1	1	10	78	285	450	2242
55	380	297	260	169	55	8	0	0	5	54	231	388	1849
50	231	170	138	80	17	1	0	0	1	17	117	237	1010

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 Jul 28, 2006
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