VALLECITO DAM, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(058582) VALLECITO DAM
From Year=1917 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	0	1	16	95	286	532	749	693	471	205	25	0	3073
40 S	0	1	17	112	397	930	1679	2372	2843	3048	3073	3073	3073
45 M	0	0	2	28	155	383	594	538	324	94	3	0	2121
45 S	0	0	2	30	185	568	1162	1700	2024	2118	2121	2121	2121
50 M	0	0	0	4	60	240	439	383	185	27	0	0	1338
50 S	0	0	0	4	64	304	743	1126	1311	1338	1338	1338	1338
55 M	0	0	0	0	13	117	284	230	75	3	0	0	724
55 S	0	0	0	0	14	131	415	646	720	724	724	724	724
60 M	0	0	0	0	2	36	137	92	16	0	0	0	283
60 S	0	0	0	0	2	38	175	267	283	283	283	283	283

Corn Growing Degree Days
50 M	2	6	38	116	236	384	485	445	333	189	47	6	2285
50 S	2	8	46	162	398	782	1266	1711	2044	2232	2279	2285	2285

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