IDAHO SPRINGS, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(054234) IDAHO SPRINGS
From Year=1893 To Year=1974
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	7	9	28	104	276	520	698	659	438	195	38	8	2980
40 S	7	16	44	147	424	944	1642	2301	2739	2934	2972	2980	2980
45 M	1	1	6	37	154	373	543	504	296	92	8	2	2018
45 S	1	3	9	46	201	573	1117	1620	1916	2008	2016	2018	2018
50 M	0	0	1	8	64	233	389	349	166	28	1	0	1238
50 S	0	0	1	9	72	306	694	1043	1209	1237	1238	1238	1238
55 M	0	0	0	1	15	116	236	198	65	4	0	0	635
55 S	0	0	0	1	16	131	367	566	631	635	635	635	635
60 M	0	0	0	0	1	37	101	73	12	0	0	0	224
60 S	0	0	0	0	2	39	139	212	224	224	224	224	224

Corn Growing Degree Days
50 M	9	13	35	97	201	345	434	412	301	166	45	11	2069
50 S	9	22	56	154	355	699	1134	1545	1846	2013	2058	2069	2069

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