ORLEANS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046508) ORLEANS
From Year=1903 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	122	204	351	481	666	820	1045	1023	836	579	280	129	6537
40 S	122	326	677	1158	1825	2645	3689	4713	5548	6128	6408	6537	6537
45 M	36	90	206	333	511	670	890	868	686	425	147	41	4904
45 S	36	126	333	666	1177	1848	2737	3605	4291	4716	4863	4904	4904
50 M	6	25	93	197	358	520	735	713	536	274	55	8	3520
50 S	6	30	124	321	680	1200	1935	2648	3184	3457	3512	3520	3520
55 M	0	4	29	93	217	371	580	558	387	143	13	1	2396
55 S	0	4	34	127	344	715	1295	1853	2239	2383	2395	2396	2396
60 M	0	0	5	30	105	230	425	404	243	53	1	0	1497
60 S	0	0	6	36	141	371	795	1199	1442	1495	1497	1497	1497

Corn Growing Degree Days
50 M	45	105	211	305	414	500	617	604	512	355	128	43	3839
50 S	45	150	361	666	1080	1580	2197	2801	3313	3668	3796	3839	3839

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