WINDSOR, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(059147) WINDSOR
From Year=1941 To Year=1990
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	17	21	75	262	458	735	1007	972	631	347	58	11	4593
40 S	17	37	112	375	832	1567	2574	3546	4177	4524	4581	4593	4593
45 M	7	4	28	157	318	587	852	817	485	216	18	2	3490
45 S	7	11	38	195	513	1100	1952	2769	3254	3470	3488	3490	3490
50 M	2	0	8	77	196	441	697	662	345	110	5	0	2543
50 S	2	3	10	87	283	723	1421	2083	2427	2538	2543	2543	2543
55 M	0	0	2	27	99	302	542	508	215	42	0	0	1739
55 S	0	0	2	29	128	431	973	1481	1696	1738	1739	1739	1739
60 M	0	0	0	4	34	177	387	356	109	8	0	0	1076
60 S	0	0	0	4	38	215	602	959	1068	1076	1076	1076	1076

Corn Growing Degree Days
50 M	27	40	83	191	291	446	622	597	431	273	85	26	3114
50 S	27	67	150	341	632	1079	1701	2298	2729	3003	3088	3114	3114

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