Greenock weather in September 2025

Expect 57°F daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Greenock in September. Check more long-term weather averages for Greenock in September before you book your next holiday to Scotland in 2025/2026.

  • 57°F maximum daytime temperature in September in Greenock57
    57°F max day temperature
  • 3 hours of sunshine per day
  • 20 days with some rainfall in September in Greenock20
    20 days with some rainfall
  • 46°F minimum night-time temperature in September in Greenock46
    46°F min night temperature
  • 13 hours of daylight per day in September in Greenock13
    13 hours of daylight per day
  • No heat & humidity in September in Greenock0
    No heat & humidity
  • 8.6 inches monthly rainfall in September in Greenock8.6
    8.6 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Greenock3
    3 (Moderate) UV index
  • 55°F sea temperature in September in Greenock55
    55°F sea temperature

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The September weather guide for Scotland (Greenock) 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)  |  Imperial (°F)

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More about Scotland

How warm is it in Greenock in September?

Daytime temperatures usually reach 57°F in Greenock in September, falling to 46°F at night.

How sunny is it in Greenock in September?

There are normally 3 hours of bright sunshine each day in Greenock in September - that's 27% of daylight hours.

How warm is the sea around Greenock in September?

The average sea temperature around Greenock in September is 55°F.

Does it rain in Greenock in September?

There are usually 20 days with some rain in Greenock in September and the average monthly rainfall is 8.6 inches.

Greenock September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:24 19:13
Monday, 15th September 2025 05:51 18:36
Tuesday, 30th September 2025 06:20 17:56

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