NUNN, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(056023) NUNN
From Year=1948 To Year=1997
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	7	22	80	217	470	763	978	929	609	266	58	16	4415
40 S	7	29	109	326	796	1559	2537	3466	4075	4341	4399	4415	4415
45 M	1	4	28	121	325	613	823	774	465	156	21	3	3334
45 S	1	5	33	154	479	1092	1916	2689	3155	3310	3331	3334	3334
50 M	0	0	6	57	199	464	668	619	328	71	4	0	2417
50 S	0	0	6	63	262	727	1395	2014	2341	2413	2417	2417	2417
55 M	0	0	0	21	103	321	513	465	204	24	0	0	1650
55 S	0	0	0	21	124	444	958	1422	1626	1650	1650	1650	1650
60 M	0	0	0	4	40	192	360	313	102	5	0	0	1016
60 S	0	0	0	4	44	235	596	909	1011	1016	1016	1016	1016

Corn Growing Degree Days
50 M	22	44	100	190	315	472	602	581	405	226	74	30	3060
50 S	22	66	166	355	670	1141	1743	2324	2730	2956	3030	3060	3060

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