NORTHDALE, COLORADO

Period of Record General Climate Summary - Growing Degree Days

Station:(055970) NORTHDALE
From Year=1930 To Year=2002
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	4	34	152	386	642	878	823	555	239	23	1	3737
40 S	0	4	38	190	576	1218	2096	2919	3474	3713	3736	3737	3737
45 M	0	0	6	64	244	492	723	668	406	119	3	0	2726
45 S	0	0	7	71	314	807	1530	2198	2604	2723	2726	2726	2726
50 M	0	0	1	17	124	345	568	513	262	40	0	0	1870
50 S	0	0	1	18	142	487	1055	1568	1830	1870	1870	1870	1870
55 M	0	0	0	2	42	207	413	358	134	7	0	0	1165
55 S	0	0	0	2	45	252	665	1023	1157	1165	1165	1165	1165
60 M	0	0	0	0	8	96	259	207	44	0	0	0	615
60 S	0	0	0	0	8	105	364	571	615	615	615	615	615

Corn Growing Degree Days
50 M	2	9	49	155	306	455	566	534	393	219	49	5	2743
50 S	2	11	60	216	521	976	1542	2076	2469	2689	2738	2743	2743

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