VAIL, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(058575) VAIL
From Year=1985 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	0	5	45	208	412	603	553	309	82	1	0	2218
40 S	0	0	5	50	258	670	1273	1826	2135	2216	2218	2218	2218
45 M	0	0	0	10	99	266	448	399	175	24	0	0	1420
45 S	0	0	0	10	109	375	824	1222	1397	1420	1420	1420	1420
50 M	0	0	0	1	28	136	295	245	69	3	0	0	776
50 S	0	0	0	1	29	164	459	704	773	776	776	776	776
55 M	0	0	0	0	4	41	147	104	16	0	0	0	312
55 S	0	0	0	0	4	45	193	296	312	312	312	312	312
60 M	0	0	0	0	0	5	40	19	2	0	0	0	65
60 S	0	0	0	0	0	5	45	64	65	65	65	65	65

Corn Growing Degree Days
50 M	0	0	14	61	184	333	428	392	260	107	7	0	1786
50 S	0	1	15	76	260	592	1020	1412	1672	1779	1786	1786	1786

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