NANTUCKET MEM AP, MASSACHUSETTS

Period of Record General Climate Summary - Growing Degree Days

Station:(195159) NANTUCKET FAA AIRPORT
From Year=1948 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	16	10	32	146	394	644	877	877	677	439	199	51	4363
40 S	16	27	59	204	598	1242	2119	2997	3674	4113	4312	4363	4363
45 M	2	1	6	52	242	494	722	722	527	291	97	15	3171
45 S	2	3	9	61	303	797	1519	2242	2769	3060	3157	3171	3171
50 M	0	0	1	12	114	344	567	567	378	164	34	2	2182
50 S	0	0	1	13	126	470	1038	1605	1983	2147	2181	2182	2182
55 M	0	0	0	1	35	199	412	413	234	71	7	0	1374
55 S	0	0	0	1	36	236	648	1061	1295	1366	1373	1374	1374
60 M	0	0	0	0	7	83	258	259	114	18	1	0	740
60 S	0	0	0	0	7	90	348	607	721	739	740	740	740

Corn Growing Degree Days
50 M	2	2	6	44	164	351	567	567	389	203	67	12	2374
50 S	2	4	10	54	218	569	1136	1703	2092	2295	2362	2374	2374

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