SILVERTON, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(057656) SILVERTON
From Year=1899 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	0	14	111	301	483	433	233	54	1	0	1631
40 S	0	0	1	14	126	426	909	1343	1576	1630	1631	1631	1631
45 M	0	0	0	2	31	163	328	279	104	9	0	0	916
45 S	0	0	0	2	33	196	524	803	907	916	916	916	916
50 M	0	0	0	0	4	56	175	130	24	1	0	0	391
50 S	0	0	0	0	4	61	236	367	390	391	391	391	391
55 M	0	0	0	0	0	9	50	27	2	0	0	0	88
55 S	0	0	0	0	1	10	59	86	88	88	88	88	88
60 M	0	0	0	0	0	0	4	1	0	0	0	0	6
60 S	0	0	0	0	0	0	4	5	6	6	6	6	6

Corn Growing Degree Days
50 M	1	1	7	34	134	271	359	320	224	106	19	1	1479
50 S	1	2	10	44	178	449	808	1129	1352	1459	1478	1479	1479

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