CALDWELL, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(101380) CALDWELL
From Year=1904 To Year=1997
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	11	35	146	341	591	795	1059	980	658	350	74	18	5059
40 S	11	46	192	533	1125	1919	2978	3959	4617	4967	5041	5059	5059
45 M	2	8	61	208	438	645	904	825	508	212	25	5	3841
45 S	2	10	71	279	716	1361	2265	3091	3599	3811	3836	3841	3841
50 M	0	1	18	105	292	495	749	670	362	104	6	1	2803
50 S	0	1	19	124	416	911	1661	2331	2693	2797	2802	2803	2803
55 M	0	0	3	41	168	349	594	516	228	37	1	0	1937
55 S	0	0	3	44	213	562	1156	1671	1899	1936	1937	1937	1937
60 M	0	0	0	12	80	215	440	363	118	8	0	0	1237
60 S	0	0	0	12	92	307	747	1110	1228	1237	1237	1237	1237

Corn Growing Degree Days
50 M	4	23	114	241	384	497	645	604	441	259	51	7	3271
50 S	4	27	142	383	768	1265	1910	2514	2955	3214	3264	3271	3271

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