ARRIBA, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(050348) ARRIBA
From Year=1907 To Year=1958
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	12	24	75	235	467	763	993	945	674	362	84	18	4652
40 S	12	36	111	346	813	1576	2569	3514	4188	4550	4634	4652	4652
45 M	2	6	28	133	326	613	838	790	527	235	31	4	3533
45 S	2	8	36	169	495	1108	1946	2736	3263	3497	3529	3533	3533
50 M	0	1	8	61	201	465	683	635	384	128	7	1	2573
50 S	0	1	9	69	270	735	1418	2053	2437	2566	2572	2573	2573
55 M	0	0	1	18	103	323	528	480	251	54	1	0	1758
55 S	0	0	1	19	122	444	972	1452	1703	1757	1758	1758	1758
60 M	0	0	0	3	39	195	373	327	136	14	0	0	1088
60 S	0	0	0	3	42	237	610	937	1074	1088	1088	1088	1088

Corn Growing Degree Days
50 M	25	41	93	189	306	476	628	600	437	271	96	33	3194
50 S	25	66	159	348	654	1130	1759	2358	2795	3066	3162	3194	3194

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