RIDGWAY, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(057020) RIDGWAY
From Year=1982 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	1	2	37	123	333	551	746	693	441	157	21	1	3107
40 S	1	3	40	163	497	1048	1794	2487	2928	3085	3106	3107	3107
45 M	0	0	8	48	201	402	591	538	297	64	4	0	2154
45 S	0	0	9	56	257	660	1251	1789	2086	2150	2154	2154	2154
50 M	0	0	1	12	93	259	436	383	166	18	0	0	1369
50 S	0	0	1	13	106	365	801	1184	1350	1368	1369	1369	1369
55 M	0	0	0	1	28	131	281	231	65	3	0	0	741
55 S	0	0	0	1	30	161	442	673	738	741	741	741	741
60 M	0	0	0	0	6	41	137	92	14	0	0	0	291
60 S	0	0	0	0	6	47	184	277	291	291	291	291	291

Corn Growing Degree Days
50 M	6	10	70	137	282	421	505	475	355	200	58	6	2524
50 S	6	16	86	223	504	925	1429	1905	2260	2460	2518	2524	2524

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