New Hampshire weather in September 2025

Expect 22°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in New Hampshire in September. Check more long-term weather averages for New Hampshire in September before you book your next holiday to New Hampshire in 2025/2026.

  • 22°C maximum daytime temperature in September in New Hampshire (Concord)22
    22°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in New Hampshire (Concord)9
    9 days with some rainfall
  • 9°C minimum night-time temperature in September in New Hampshire (Concord)9
    9°C min night temperature
  • 12 hours of daylight per day in September in New Hampshire (Concord)12
    12 hours of daylight per day
  • No heat & humidity in September in New Hampshire (Concord)0
    No heat & humidity
  • 73 mm monthly rainfall in September in New Hampshire (Concord)73
    73 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in New Hampshire (Concord)6
    6 (High) UV index

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The September weather guide for New Hampshire (Concord) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top New Hampshire destinations

Below are average maximum temperatures at popular countries, regions and places in New Hampshire in September. Select a holiday destination to see more weather parameters.

All New Hampshire destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in New Hampshire in September?

Daytime temperatures usually reach 22°C in Concord, New Hampshire in September, falling to 9°C at night.

How sunny is it in New Hampshire in September?

There are normally 7 hours of bright sunshine each day in Concord, New Hampshire in September - that's 56% of daylight hours.

Does it rain in New Hampshire in September?

There are usually 9 days with some rain in Concord, New Hampshire in September and the average monthly rainfall is 73mm.

What is the chance of a hurricane in New Hampshire in September?

On average less than 1 day in September in Concord, New Hampshire is likely to be affected by the passage of one or more tropical storms.

New Hampshire September sunrise & sunset times

Browse the sunrise and sunset times for New Hampshire in September 2025. Select a month to view New Hampshire sunrise and sunset times for the next 12 months. The New Hampshire sunrise and sunset times shown below are for Concord.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:11 18:21
Monday, 15th September 2025 05:26 17:56
Tuesday, 30th September 2025 05:43 17:29

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