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Nashua, NH - Weather forecast from Theweather.com. Weather conditions with updates on temperature, humidity, wind speed, snow, pressure, etc. for Nashua, New Hampshire Today: Clear skies, with a maximum temperature of 30Â° and a minimum temperature of 7Â°. Moderate northwest wind with maximum gusts of 24 mph.
Most / Least Educated Cities in NH. The average temperature of Portsmouth is 47.14Â°F, which is higher than the New Hampshire average temperature of 44.49Â°F and is much lower than the national average temperature of 54.45Â°F.