DIVIDE, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(242421) DIVIDE 2 NW
From Year=1915 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	1	2	16	84	265	472	723	671	386	150	14	1	2786
40 S	1	4	20	104	369	841	1564	2235	2621	2771	2785	2786	2786
45 M	0	0	3	33	149	327	569	516	253	68	2	0	1919
45 S	0	0	3	36	184	512	1080	1596	1849	1917	1919	1919	1919
50 M	0	0	0	9	68	197	415	364	140	21	0	0	1214
50 S	0	0	0	9	77	274	689	1053	1193	1214	1214	1214	1214
55 M	0	0	0	1	23	97	267	221	59	3	0	0	671
55 S	0	0	0	1	24	121	388	609	668	671	671	671	671
60 M	0	0	0	0	5	34	137	100	15	0	0	0	291
60 S	0	0	0	0	5	39	176	276	291	291	291	291	291

Corn Growing Degree Days
50 M	1	3	21	78	185	298	465	438	276	132	16	1	1913
50 S	1	3	25	103	288	586	1051	1489	1765	1897	1912	1913	1913

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