Temperature in New Hampshire in September

Daytime highs, nighttime lows and the warmest cities in New Hampshire, the United States of America this September.

New Hampshire, the United States of America, a region in the United States of America, experiences maximum daytime temperatures in September ranging from 19°C (66°F) in Waterville Valley to 24°C (75°F) in Nashua. Nighttime temperatures generally drop to 11°C (52°F) in Nashua and 8°C (46°F) in Waterville Valley.

What is the temperature of the different cities in New Hampshire, the United States of America in September?

Find the average daytime temperatures in September for the most popular destinations in New Hampshire on the map below. Click on a destination dot for more detailed information.

Select a Month

Check the conditions for any month of the year.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For a detailed overview over the year and the best time to visit New Hampshire, check out our New Hampshire's climate page.

See also: New Hampshire weather by month.

Best Places to Visit in New Hampshire in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across New Hampshire.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in New Hampshire

New Hampshire temperatures in September: frequently asked questions

How hot does it get in New Hampshire, the United States of America in September?

Portsmouth averages a daytime high of 23°C (73°F) in September, which is high for New Hampshire, the United States of America.

How cold does it get at night in New Hampshire, the United States of America in September?

Portsmouth sees nighttime lows close to 12°C (54°F) in September.

What is the warmest city in September in New Hampshire, the United States of America?

Data insights from our comprehensive database indicate that Nashua is the city with the highest warmth. Daytime peaks average near 24°C (75°F), while the nights are characterized by a low temperature close to 11°C (52°F).

What is the coldest city in September in New Hampshire, the United States of America?

In our database, Waterville Valley is the chilliest city in September in New Hampshire, the United States of America. Daytime temperatures typically peak at 19°C (66°F), while the nighttime lows hover around 8°C (46°F).

How much sun does New Hampshire, the United States of America get in September?

The weather is predominantly sunny, with an estimated total of around 214 hours of sunshine in Portsmouth. This means many sunny days, which creates a cheerful atmosphere during this month.

Interested in more climate information?

We have much more information about the climate in New Hampshire.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

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