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Period of Record General Climate Summary - Growing Degree Days

Station:(191386) CHATHAM WSMO
From Year=1972 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	14	10	43	170	419	668	887	890	697	435	194	49	4476
40 S	14	24	67	237	656	1324	2211	3101	3798	4232	4426	4476	4476
45 M	2	1	9	64	265	518	732	735	547	284	91	13	3261
45 S	2	3	12	76	342	860	1592	2327	2874	3157	3248	3261	3261
50 M	0	0	2	14	128	369	577	580	397	152	28	2	2249
50 S	0	0	2	16	144	513	1090	1670	2067	2219	2247	2249	2249
55 M	0	0	1	2	42	223	422	425	250	60	4	0	1429
55 S	0	0	1	3	45	268	690	1115	1364	1424	1429	1429	1429
60 M	0	0	0	0	8	100	268	271	117	13	0	0	777
60 S	0	0	0	0	9	108	376	647	764	777	777	777	777

Corn Growing Degree Days
50 M	2	1	10	45	161	371	576	580	400	184	54	9	2393
50 S	2	4	13	58	218	589	1166	1746	2146	2330	2384	2393	2393

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