COLLBRAN, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(051741) COLLBRAN
From Year=1893 To Year=1999
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	1	5	51	207	446	687	903	843	575	273	38	2	4031
40 S	1	6	57	264	710	1397	2300	3143	3718	3991	4029	4031	4031
45 M	0	1	14	105	301	537	748	688	428	149	9	0	2980
45 S	0	1	14	120	420	957	1705	2393	2821	2970	2979	2980	2980
50 M	0	0	2	39	173	389	593	533	285	62	1	0	2078
50 S	0	0	2	41	214	603	1196	1729	2015	2077	2078	2078	2078
55 M	0	0	0	9	74	248	438	378	157	17	0	0	1321
55 S	0	0	0	9	83	331	769	1148	1305	1321	1321	1321	1321
60 M	0	0	0	1	18	126	284	226	61	2	0	0	718
60 S	0	0	0	1	18	144	428	655	716	718	718	718	718

Corn Growing Degree Days
50 M	1	9	60	175	322	459	575	545	402	237	54	4	2844
50 S	1	11	70	245	568	1027	1602	2146	2549	2785	2840	2844	2844

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