FT COLLINS, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(053005) FORT COLLINS
From Year=1893 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	13	22	89	241	486	746	949	895	610	306	69	15	4441
40 S	13	35	124	365	851	1597	2547	3441	4052	4358	4426	4441	4441
45 M	3	6	36	133	339	596	794	740	464	179	23	3	3315
45 S	3	8	44	177	516	1112	1907	2647	3110	3289	3312	3315	3315
50 M	0	1	10	57	206	447	639	585	322	82	5	1	2356
50 S	0	1	12	69	275	722	1362	1947	2269	2350	2355	2356	2356
55 M	0	0	2	16	101	303	485	430	192	26	0	0	1555
55 S	0	0	2	18	119	422	907	1337	1529	1555	1555	1555	1555
60 M	0	0	0	2	34	173	331	277	88	5	0	0	911
60 S	0	0	0	2	36	209	541	818	906	911	911	911	911

Corn Growing Degree Days
50 M	26	36	93	181	303	462	608	572	393	234	83	28	3019
50 S	26	62	155	336	639	1101	1709	2280	2674	2908	2991	3019	3019

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