MONTROSE 1, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(055717) MONTROSE 1
From Year=1905 To Year=1982
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	2	9	85	259	519	780	976	902	633	315	45	3	4531
40 S	2	11	97	356	875	1655	2631	3534	4167	4483	4528	4531	4531
45 M	0	1	28	144	370	630	821	747	485	185	11	1	3424
45 S	0	2	30	174	544	1174	1995	2743	3227	3412	3423	3424	3424
50 M	0	0	5	61	236	480	666	592	339	83	1	0	2464
50 S	0	0	5	66	302	782	1449	2041	2380	2463	2464	2464	2464
55 M	0	0	0	18	124	335	511	437	204	25	0	0	1654
55 S	0	0	0	18	142	477	988	1426	1630	1654	1654	1654	1654
60 M	0	0	0	2	46	202	357	284	92	3	0	0	985
60 S	0	0	0	2	48	250	606	890	982	985	985	985	985

Corn Growing Degree Days
50 M	3	12	84	195	347	500	616	574	420	240	60	6	3057
50 S	3	15	99	294	641	1142	1758	2331	2751	2991	3051	3057	3057

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