HUNTLEY EXP STN, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(244345) HUNTLEY EXPERIMENT STN
From Year=1911 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	6	16	65	214	466	699	953	891	543	256	48	9	4167
40 S	6	22	87	301	767	1466	2419	3310	3853	4110	4158	4167	4167
45 M	1	4	24	119	323	549	798	736	400	148	16	2	3120
45 S	1	5	29	148	471	1020	1818	2554	2955	3103	3118	3120	3120
50 M	0	1	6	55	198	402	643	582	269	69	3	0	2228
50 S	0	1	7	62	260	662	1305	1887	2156	2225	2228	2228	2228
55 M	0	0	1	19	104	264	489	428	158	24	0	0	1488
55 S	0	0	1	20	124	389	878	1306	1464	1488	1488	1488	1488
60 M	0	0	0	5	44	148	339	282	76	5	0	0	898
60 S	0	0	0	5	49	196	535	817	892	898	898	898	898

Corn Growing Degree Days
50 M	9	23	71	173	303	429	589	554	364	212	57	13	2797
50 S	9	32	103	276	579	1009	1598	2152	2516	2728	2784	2797	2797

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