MONTROSE 2, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(055722) MONTROSE 2
From Year=1900 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	5	14	92	266	534	790	994	923	654	333	56	5	4665
40 S	5	18	110	376	911	1701	2694	3618	4272	4604	4660	4665	4665
45 M	1	2	34	152	385	640	839	768	505	201	16	1	3545
45 S	1	4	37	189	574	1214	2053	2821	3326	3528	3544	3545	3545
50 M	1	0	8	70	248	491	684	613	359	97	3	0	2573
50 S	1	1	9	78	327	818	1501	2115	2474	2571	2573	2573	2573
55 M	0	0	1	22	134	345	529	459	222	32	0	0	1744
55 S	0	0	1	23	157	502	1031	1489	1712	1744	1744	1744	1744
60 M	0	0	0	4	53	211	374	305	107	5	0	0	1058
60 S	0	0	0	4	57	267	641	946	1053	1058	1058	1058	1058

Corn Growing Degree Days
50 M	6	19	87	196	351	505	630	590	429	250	64	7	3133
50 S	6	24	111	308	659	1164	1794	2384	2813	3063	3126	3133	3133

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 Jul 28, 2006
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