ASPEN, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(050370) ASPEN
From Year=1948 To Year=1979
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	7	69	265	486	692	628	405	175	14	0	2742
40 S	0	1	7	77	342	828	1520	2148	2553	2728	2742	2742	2742
45 M	0	0	1	20	141	339	537	473	261	75	2	0	1849
45 S	0	0	1	21	161	501	1037	1511	1772	1847	1849	1849	1849
50 M	0	0	0	2	49	201	382	319	132	17	0	0	1103
50 S	0	0	0	2	52	253	635	953	1086	1103	1103	1103	1103
55 M	0	0	0	0	8	89	228	169	43	1	0	0	538
55 S	0	0	0	0	8	97	325	494	537	538	538	538	538
60 M	0	0	0	0	0	23	87	50	7	0	0	0	166
60 S	0	0	0	0	0	23	110	160	166	166	166	166	166

Corn Growing Degree Days
50 M	1	2	16	82	215	354	462	426	306	175	27	1	2068
50 S	1	3	19	101	316	670	1133	1558	1864	2039	2067	2068	2068

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