ALTURAS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(040161) ALTURAS RANGER STATION
From Year=1905 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	7	18	64	171	365	572	814	757	519	254	54	10	3605
40 S	7	25	89	259	625	1197	2011	2768	3287	3542	3595	3605	3605
45 M	1	2	18	79	229	424	659	602	373	136	14	1	2538
45 S	1	3	21	100	329	754	1413	2015	2387	2524	2537	2538	2538
50 M	0	0	2	25	120	283	504	448	236	55	2	0	1675
50 S	0	0	2	28	148	431	935	1383	1619	1673	1675	1675	1675
55 M	0	0	0	4	49	161	352	297	120	15	0	0	997
55 S	0	0	0	5	53	214	565	862	982	997	997	997	997
60 M	0	0	0	0	13	71	207	159	41	2	0	0	493
60 S	0	0	0	0	13	84	291	450	491	493	493	493	493

Corn Growing Degree Days
50 M	12	27	83	169	287	401	538	527	423	270	83	17	2836
50 S	12	38	122	291	578	979	1517	2043	2466	2736	2819	2836	2836

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
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