SULA 3 ENE, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(247964) SULA 3 ENE
From Year=1955 To Year=2006
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	4	23	97	277	465	661	628	360	127	14	1	2659
40 S	1	5	28	125	402	867	1529	2157	2517	2643	2657	2659	2659
45 M	0	0	4	35	151	318	506	474	224	47	3	0	1762
45 S	0	0	4	39	191	508	1015	1488	1712	1760	1762	1762	1762
50 M	0	0	0	8	62	182	352	321	111	10	0	0	1048
50 S	0	0	0	8	71	253	606	927	1038	1048	1048	1048	1048
55 M	0	0	0	1	16	80	206	179	39	1	0	0	522
55 S	0	0	0	1	17	96	303	481	520	522	522	522	522
60 M	0	0	0	0	2	22	87	68	8	0	0	0	187
60 S	0	0	0	0	2	24	111	179	187	187	187	187	187

Corn Growing Degree Days
50 M	1	8	41	116	234	337	484	474	327	169	22	1	2215
50 S	1	9	50	166	400	737	1221	1696	2023	2192	2214	2215	2215

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 Jul 28, 2006
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