SAN BERNARDINO, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047723) SAN BERNARDINO
From Year=1927 To Year=2004
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	398	420	530	646	816	961	1193	1200	1051	848	566	421	9050
40 S	398	817	1347	1993	2809	3770	4963	6163	7214	8062	8629	9050	9050
45 M	251	281	375	496	661	811	1038	1045	901	693	417	271	7241
45 S	251	532	907	1403	2065	2875	3913	4958	5860	6553	6970	7241	7241
50 M	127	156	228	348	506	661	883	890	751	538	271	139	5498
50 S	127	283	511	858	1365	2026	2908	3799	4550	5088	5359	5498	5498
55 M	44	64	108	210	353	511	728	735	601	385	144	49	3932
55 S	44	109	216	426	779	1290	2018	2753	3354	3739	3883	3932	3932
60 M	10	19	35	101	210	362	573	580	451	238	55	10	2645
60 S	10	29	65	165	375	737	1310	1890	2341	2579	2634	2645	2645

Corn Growing Degree Days
50 M	254	259	321	392	499	587	718	725	639	522	367	276	5558
50 S	254	513	835	1226	1725	2312	3030	3755	4394	4916	5282	5558	5558

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 Apr 5, 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