Average Temperatures for New Hampshire in September





Average temperatures for September at cities, communities and other locations around around New Hampshire are listed below in degrees Fahrenheit and Celsius.

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

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Southern New Hampshire

Average September temperatures
High °F Low °F Place High °C Low °C
74 49 Concord 23 9
73 50 Durham 23 10
72 48 Franklin Falls Reservoir Dam 22 9
73 47 Keene 23 8
73 52 Laconia & Lakeport 23 11
73 49 Lebanon 23 9
73 52 Massabesic Lake 23 11
70 50 Mount Sunapee 21 10
75 51 Nashua 24 11
72 52 Portsmouth & Greenland 22 11
73 50 Rochester 23 10

Northern New Hampshire

Average daily temperatures in September
High °F Low °F Place High °C Low °C
70 45 Berlin 21 7
72 42 Bethlehem 22 6
68 43 Colebrook 20 6
66 44 First Connecticut Lake 19 7
49 37 Mount Washington 10 3
72 48 North Conway 22 9
68 45 Pinkham Notch 20 7
72 45 Plymouth 22 7
70 44 Tamworth 21 7
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

New Hampshire Temperatures
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