IMPERIAL, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(044223) IMPERIAL
From Year=1901 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	477	545	757	919	1171	1371	1601	1587	1376	1084	692	484	12063
40 S	477	1022	1779	2698	3869	5240	6841	8428	9804	10888	11579	12063	12063
45 M	325	404	602	769	1016	1221	1446	1432	1226	929	542	330	10242
45 S	325	730	1331	2100	3116	4337	5783	7215	8441	9370	9912	10242	10242
50 M	183	267	447	619	861	1071	1291	1277	1076	774	393	186	8443
50 S	183	449	896	1515	2376	3447	4738	6015	7091	7865	8258	8443	8443
55 M	72	141	294	469	706	921	1136	1122	926	619	250	72	6728
55 S	72	213	508	977	1682	2604	3739	4861	5787	6406	6656	6728	6728
60 M	16	52	158	322	551	771	981	967	776	465	128	15	5202
60 S	16	69	227	548	1099	1870	2851	3818	4594	5059	5187	5202	5202

Corn Growing Degree Days
50 M	310	345	476	577	726	822	971	976	851	688	443	311	7496
50 S	310	655	1131	1708	2434	3256	4227	5203	6054	6742	7185	7496	7496

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