DENVER STAPLETON, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(052220) DENVER WSFO AP
From Year=1948 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	30	45	122	272	540	820	1044	982	686	375	113	36	5066
40 S	30	76	198	470	1011	1830	2874	3855	4541	4917	5030	5066	5066
45 M	8	15	56	163	393	670	889	827	539	246	51	10	3865
45 S	8	23	78	241	634	1304	2193	3019	3558	3804	3855	3865	3865
50 M	1	3	19	82	258	521	734	672	396	138	16	2	2841
50 S	1	4	23	105	363	884	1618	2289	2686	2823	2840	2841	2841
55 M	0	0	4	32	144	376	579	517	263	61	3	0	1980
55 S	0	0	4	37	181	557	1136	1653	1916	1977	1980	1980	1980
60 M	0	0	0	9	63	241	425	363	148	18	0	0	1267
60 S	0	0	0	9	72	313	738	1101	1249	1267	1267	1267	1267

Corn Growing Degree Days
50 M	43	53	112	195	332	509	670	633	433	266	107	48	3401
50 S	43	96	208	403	735	1244	1914	2547	2980	3246	3353	3401	3401

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