FRESNO YOSEMITE INTL AP, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043257) FRESNO WSO AP
From Year=1948 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	199	314	478	636	897	1083	1302	1247	1057	788	416	196	8612
40 S	199	513	991	1626	2523	3606	4908	6155	7212	8000	8416	8612	8612
45 M	88	180	324	486	742	933	1147	1092	907	633	269	84	6884
45 S	88	268	592	1078	1820	2752	3899	4992	5899	6532	6801	6884	6884
50 M	27	75	184	338	587	783	992	937	757	479	144	25	5327
50 S	27	103	287	625	1211	1994	2986	3923	4680	5158	5302	5327	5327
55 M	4	20	78	204	432	633	837	782	607	327	57	4	3985
55 S	4	24	103	306	739	1372	2209	2991	3598	3925	3981	3985	3985
60 M	0	2	22	100	286	483	682	627	457	190	13	0	2863
60 S	0	2	25	125	411	894	1576	2203	2660	2850	2863	2863	2863

Corn Growing Degree Days
50 M	89	166	270	379	556	677	801	772	665	489	235	92	5191
50 S	89	255	525	903	1459	2137	2938	3710	4375	4864	5099	5191	5191

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