ALTURAS RANGER STATION, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(040161) ALTURAS RANGER STATION
From Year=1931 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	1103	898	825	624	415	203	56	80	239	540	832	1057	6872
60	948	757	670	474	272	102	15	22	123	387	682	902	5354
57	855	672	577	386	198	60	6	9	76	300	592	809	4539
55	793	616	515	328	154	40	3	5	53	246	532	747	4031
50	638	475	362	199	72	12	0	1	18	131	384	592	2882

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