Northamptonshire weather in September 2025

Expect 18°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Northamptonshire in September. Check more long-term weather averages for Northamptonshire in September before you book your next holiday to Northamptonshire in 2025/2026.

  • 18°C maximum daytime temperature in September in Northamptonshire (Northampton)18
    18°C max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in September in Northamptonshire (Northampton)12
    12 days with some rainfall
  • 9°C minimum night-time temperature in September in Northamptonshire (Northampton)9
    9°C min night temperature
  • 13 hours of daylight per day in September in Northamptonshire (Northampton)13
    13 hours of daylight per day
  • No heat & humidity in September in Northamptonshire (Northampton)0
    No heat & humidity
  • 48 mm monthly rainfall in September in Northamptonshire (Northampton)48
    48 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Northamptonshire (Northampton)4
    4 (Moderate) UV index

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The September weather guide for Northamptonshire (Northampton) 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.

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

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More about the UK

How hot is it in Northamptonshire in September?

Daytime temperatures usually reach 18°C in Northampton, Northamptonshire in September, falling to 9°C at night.

How sunny is it in Northamptonshire in September?

There are normally 4 hours of bright sunshine each day in Northampton, Northamptonshire in September - that's 35% of daylight hours.

Does it rain in Northamptonshire in September?

There are usually 12 days with some rain in Northampton, Northamptonshire in September and the average monthly rainfall is 48mm.

Northamptonshire September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:15 18:51
Monday, 15th September 2025 05:38 18:18
Tuesday, 30th September 2025 06:03 17:43

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