YREKA, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049866) YREKA
From Year=1948 To Year=2005
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	950	734	673	487	283	111	17	22	105	378	709	934	5403
60	795	593	518	341	166	48	4	5	45	240	559	779	4093
57	702	508	426	261	110	26	1	1	23	168	469	686	3381
55	640	452	365	211	80	16	1	0	13	127	410	624	2938
50	485	311	221	109	28	3	0	0	2	52	267	469	1948

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 Apr 5, 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