HAYDEN, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(053867) HAYDEN
From Year=1909 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	17	138	369	603	828	775	494	208	21	1	3454
40 S	0	1	17	155	524	1127	1955	2730	3224	3432	3453	3454	3454
45 M	0	0	4	59	229	454	673	620	350	99	4	0	2491
45 S	0	0	4	63	293	747	1420	2039	2389	2488	2491	2491	2491
50 M	0	0	1	17	115	308	518	465	214	32	0	0	1669
50 S	0	0	1	17	132	440	958	1423	1637	1669	1669	1669	1669
55 M	0	0	0	2	38	175	364	312	101	5	0	0	997
55 S	0	0	0	3	41	216	580	891	992	997	997	997	997
60 M	0	0	0	0	6	72	211	165	29	0	0	0	484
60 S	0	0	0	0	7	79	290	455	484	484	484	484	484

Corn Growing Degree Days
50 M	0	2	24	134	287	426	542	514	372	210	42	3	2555
50 S	0	2	26	160	447	872	1414	1928	2301	2510	2552	2555	2555

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