YREKA, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049866) YREKA
From Year=1893 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	957	742	670	483	283	108	15	19	111	384	706	933	5411
60	802	601	515	337	165	44	3	4	48	243	556	778	4097
57	709	516	422	256	108	23	1	1	25	170	466	685	3383
55	647	460	362	206	78	14	0	0	15	127	407	623	2939
50	492	319	220	104	26	3	0	0	3	51	264	469	1950

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