MANCHESTER, NEW HAMPSHIRE

Period of Record General Climate Summary - Growing Degree Days

Station:(275072) MANCHESTER
From Year=1885 To Year=1999
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	4	2	20	163	493	765	934	853	602	302	78	8	4223
40 S	4	6	26	189	682	1447	2380	3233	3835	4137	4215	4223	4223
45 M	1	0	5	79	342	615	779	698	453	177	31	1	3180
45 S	1	1	6	86	428	1043	1821	2519	2972	3148	3179	3180	3180
50 M	0	0	1	34	207	465	624	543	309	86	9	0	2277
50 S	0	0	2	35	242	707	1330	1873	2182	2268	2277	2277	2277
55 M	0	0	0	12	106	319	469	388	183	34	2	0	1513
55 S	0	0	0	13	118	437	906	1294	1476	1511	1513	1513	1513
60 M	0	0	0	4	44	188	315	239	88	9	0	0	887
60 S	0	0	0	4	47	235	550	790	877	886	887	887	887

Corn Growing Degree Days
50 M	2	2	13	101	285	473	613	545	351	165	36	4	2589
50 S	2	4	17	118	403	876	1488	2033	2384	2549	2584	2589	2589

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