REDLANDS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047306) REDLANDS
From Year=1898 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	377	388	508	609	771	930	1159	1162	1017	810	550	396	8678
40 S	377	765	1273	1881	2652	3582	4742	5904	6921	7732	8282	8678	8678
45 M	233	251	354	459	616	780	1004	1007	867	655	401	247	6875
45 S	233	483	837	1296	1912	2692	3697	4704	5571	6226	6628	6875	6875
50 M	113	131	210	312	461	630	849	852	717	501	258	122	5157
50 S	113	244	454	766	1227	1857	2707	3559	4277	4777	5035	5157	5157
55 M	38	52	99	180	309	480	694	697	567	348	135	42	3644
55 S	38	91	190	370	679	1160	1854	2552	3119	3467	3602	3644	3644
60 M	9	15	34	83	173	332	539	542	417	208	52	8	2414
60 S	9	23	58	141	314	646	1186	1728	2146	2354	2405	2414	2414

Corn Growing Degree Days
50 M	233	230	299	359	461	570	713	717	626	494	343	248	5292
50 S	233	462	762	1121	1581	2151	2864	3581	4207	4701	5044	5292	5292

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