Average Temperatures for New Hampshire in December

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Average temperatures for December at cities, towns, parks and lakes throughout New Hampshire are listed below in degrees Fahrenheit and Celsius.

The tables give the normals for maximum and minimum monthly temperatures based on weather data collected from 1981 to 2010.

You can jump to a separate table for Southern and Northern New Hampshire.

Southern New Hampshire

Average December temperatures
High °F Low °F Place High °C Low °C
36 17 Concord  2 -8
38 20 Durham  3 -7
35 15 Franklin Falls Reservoir Dam  2 -9
36 17 Keene  2 -8
35 20 Laconia & Lakeport  2 -7
35 17 Lebanon  2 -8
38 20 Massabesic Lake  3 -7
33 19 Mount Sunapee  1 -7
39 19 Nashua  4 -7
39 21 Portsmouth & Greenland  4 -6
35 15 Surry Mountain Lake  2 -9

Northern New Hampshire

Average daily temperatures in December
High °F Low °F Place High °C Low °C
32 13 Berlin  0 -11
32 11 Bethlehem  0 -12
29   9 Colebrook -2 -13
27   8 First Connecticut Lake -3 -14
18   2 Mount Washington -8 -17
33 15 North Conway  1   -9
31 13 Pinkham Notch -1 -11
33 14 Plymouth  1 -10
34 14 Tamworth  1 -10
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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