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September in New Hampshire generally has temperatures that range from pleasant to warm, with precipitation levels ranging from moderate to high. The average highest temperatures fluctuate between pleasant in Waterville Valley at 19°C to warm in Nashua at 24°C.
This page is a list of the average statewide temperature in the month of September in New Hampshire for each year from 1895–2022. It is a statewide average over the entire territory of the state, based on data from the NOAA.
Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C. What is the warmest city in September in New Hampshire? Nashua tops the warmest city list in our database with average maximum daytime temperatures around 24°C and a minimum nighttime temperature of around 11°C .
Since 1895, New Hampshire’s average winter temperatures (December through March) have warmed by more than 4 degrees Fahrenheit, with broad impacts on many aspects of daily life, from snow shoveling and gardening to participating in—and running businesses sustained by—winter sports.
Month: More. New Hampshire September Temperature by Year. New Hampshire September Precipitation by Year. September Weather in All 50 States. New Hampshire Cities. September weather averages for various places in New Hampshire, from 1991–2020.
New Hampshire has a mix of continental climates (wet continental climate type Dfb and an alpine climate on the highest peaks of the White Mountains) In the lower situated areas winters are cool and summers are warm. During the summer temperatures may rise above 30 degrees Celsius (86 degrees Fahrenheit).
Winter (December through February) Weather is far too cold this time of year in New Hampshire to be enjoyable for warm weather travelers. The average high during this season is between 38.7°F (3.7°C) and 27.5°F (-2.5°C). On average, it rains or snows a fair amount: 5 to 7 times per month.
