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Period of Record General Climate Summary - Growing Degree Days

Station:(475581) MONTELLO
From Year=1954 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	1	46	221	546	806	966	892	605	294	58	4	4439
40 S	1	2	48	269	815	1620	2587	3479	4084	4378	4435	4439	4439
45 M	0	0	23	130	398	656	811	737	457	180	25	1	3417
45 S	0	0	23	153	551	1207	2018	2755	3212	3392	3416	3417	3417
50 M	0	0	10	68	264	506	656	582	316	96	9	0	2509
50 S	0	0	10	79	343	849	1505	2087	2404	2500	2509	2509	2509
55 M	0	0	4	32	155	360	501	428	194	44	3	0	1722
55 S	0	0	4	37	191	552	1053	1481	1675	1719	1722	1722	1722
60 M	0	0	2	14	78	226	348	279	101	15	0	0	1062
60 S	0	0	2	16	94	319	667	946	1047	1062	1062	1062	1062

Corn Growing Degree Days
50 M	0	2	31	142	331	512	639	581	369	177	34	2	2820
50 S	0	2	33	175	506	1018	1657	2238	2607	2785	2818	2820	2820

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