GARDINER, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(243378) GARDINER
From Year=1956 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	2	7	48	156	387	629	901	854	548	254	37	3	3825
40 S	2	9	56	212	599	1228	2129	2983	3530	3785	3822	3825	3825
45 M	0	1	14	75	249	480	746	699	405	146	11	0	2825
45 S	0	1	15	90	339	819	1565	2264	2668	2814	2825	2825	2825
50 M	0	0	1	28	137	335	591	544	271	68	2	0	1979
50 S	0	0	2	30	167	502	1093	1637	1909	1977	1979	1979	1979
55 M	0	0	0	8	59	205	437	392	155	23	0	0	1280
55 S	0	0	0	8	67	272	709	1102	1257	1280	1280	1280	1280
60 M	0	0	0	1	18	105	287	247	69	5	0	0	731
60 S	0	0	0	1	19	124	411	658	726	731	731	731	731

Corn Growing Degree Days
50 M	0	4	37	117	257	398	570	543	369	185	23	1	2506
50 S	0	5	42	159	416	814	1385	1928	2297	2481	2505	2506	2506

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