WALDEN, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(058756) WALDEN
From Year=1897 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	3	37	181	409	598	527	289	73	4	0	2122
40 S	0	0	3	40	222	631	1229	1756	2045	2118	2122	2122	2122
45 M	0	0	0	8	78	265	443	373	158	19	0	0	1343
45 S	0	0	0	8	86	351	794	1166	1324	1343	1343	1343	1343
50 M	0	0	0	0	19	136	289	221	59	2	0	0	727
50 S	0	0	0	0	20	156	445	666	725	727	727	727	727
55 M	0	0	0	0	3	44	141	87	12	0	0	0	286
55 S	0	0	0	0	3	47	187	274	286	286	286	286	286
60 M	0	0	0	0	0	6	35	15	1	0	0	0	58
60 S	0	0	0	0	0	7	42	57	58	58	58	58	58

Corn Growing Degree Days
50 M	0	0	9	63	181	318	439	404	276	127	14	1	1833
50 S	0	0	9	72	253	571	1010	1415	1691	1818	1833	1833	1833

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