Keene weather in September 2025

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

  • 22°C maximum daytime temperature in September in Keene22
    22°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Keene10
    10 days with some rainfall
  • 8°C minimum night-time temperature in September in Keene8
    8°C min night temperature
  • 12 hours of daylight per day in September in Keene12
    12 hours of daylight per day
  • No heat & humidity in September in Keene0
    No heat & humidity
  • 84 mm monthly rainfall in September in Keene84
    84 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Keene6
    6 (High) UV index

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The September weather guide for New Hampshire (Keene) 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.

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

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More about the USA

How hot is it in Keene in September?

Daytime temperatures usually reach 22°C in Keene in September, falling to 8°C at night.

How sunny is it in Keene in September?

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

Does it rain in Keene in September?

There are usually 10 days with some rain in Keene in September and the average monthly rainfall is 84mm.

What is the chance of a hurricane in Keene in September?

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

Keene September sunrise & sunset times

Browse the sunrise and sunset times for Keene in September 2025. Select a month to view Keene sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:14 18:23
Monday, 15th September 2025 05:29 17:58
Tuesday, 30th September 2025 05:46 17:32

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