CALLAHAN, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(041316) CALLAHAN
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	28	56	130	242	460	661	888	848	633	365	90	28	4429
40 S	28	84	215	457	917	1578	2467	3315	3947	4312	4402	4429	4429
45 M	6	13	45	128	312	511	733	693	483	224	29	6	3184
45 S	6	19	64	192	504	1015	1748	2441	2924	3149	3178	3184	3184
50 M	1	1	8	51	181	364	578	538	335	111	5	1	2176
50 S	1	2	10	61	243	607	1185	1723	2059	2169	2175	2176	2176
55 M	0	0	0	13	85	228	424	384	201	40	0	0	1375
55 S	0	0	1	13	98	326	750	1134	1335	1375	1375	1375	1375
60 M	0	0	0	1	29	116	273	236	91	8	0	0	754
60 S	0	0	0	1	30	146	419	655	746	754	754	754	754

Corn Growing Degree Days
50 M	14	46	115	197	332	440	554	537	442	281	63	13	3034
50 S	14	60	175	371	704	1144	1698	2235	2677	2958	3021	3034	3034

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