IMPERIAL, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(044223) IMPERIAL
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	494	564	761	922	1174	1379	1602	1593	1392	1108	708	494	12192
40 S	494	1058	1819	2740	3914	5293	6895	8488	9880	10989	11697	12192	12192
45 M	342	423	606	772	1019	1229	1447	1438	1242	953	558	341	10370
45 S	342	765	1370	2142	3161	4390	5837	7275	8517	9470	10029	10370	10370
50 M	198	285	451	622	864	1079	1292	1283	1092	798	409	195	8567
50 S	198	482	933	1555	2418	3497	4790	6072	7165	7963	8372	8567	8567
55 M	83	156	298	472	709	929	1137	1128	942	644	264	78	6840
55 S	83	239	537	1009	1717	2646	3784	4911	5854	6497	6761	6840	6840
60 M	21	61	161	324	554	779	982	973	792	490	139	17	5293
60 S	21	82	243	567	1121	1900	2882	3855	4647	5137	5276	5293	5293

Corn Growing Degree Days
50 M	308	349	473	582	735	834	979	986	869	709	446	309	7578
50 S	308	657	1130	1711	2446	3280	4259	5245	6114	6823	7269	7578	7578

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 Jul 28, 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