Southampton weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Southampton in September. Check more long-term weather averages for Southampton in September before you book your next holiday to England in 2025/2026.

  • 19°C maximum daytime temperature in September in Southampton19
    19°C max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in September in Southampton12
    12 days with some rainfall
  • 11°C minimum night-time temperature in September in Southampton11
    11°C min night temperature
  • 13 hours of daylight per day in September in Southampton13
    13 hours of daylight per day
  • No heat & humidity in September in Southampton0
    No heat & humidity
  • 67 mm monthly rainfall in September in Southampton67
    67 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Southampton4
    4 (Moderate) UV index

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The September weather guide for England (Southampton) 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 England

How hot is it in Southampton in September?

Daytime temperatures usually reach 19°C in Southampton in September, falling to 11°C at night.

How sunny is it in Southampton in September?

There are normally 5 hours of bright sunshine each day in Southampton in September - that's 39% of daylight hours.

Does it rain in Southampton in September?

There are usually 12 days with some rain in Southampton in September and the average monthly rainfall is 67mm.

Southampton September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:19 18:51
Monday, 15th September 2025 05:41 18:19
Tuesday, 30th September 2025 06:05 17:45

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