Uruguay weather in September 2025

Expect 18°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Uruguay in September. Check more long-term weather averages for Uruguay in September before you book your next holiday to Uruguay in 2025/2026.

  • 18°C maximum daytime temperature in September in Uruguay (Montevideo)18
    18°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in Uruguay (Montevideo)9
    9 days with some rainfall
  • 9°C minimum night-time temperature in September in Uruguay (Montevideo)9
    9°C min night temperature
  • 12 hours of daylight per day in September in Uruguay (Montevideo)12
    12 hours of daylight per day
  • No heat & humidity in September in Uruguay (Montevideo)0
    No heat & humidity
  • 75 mm monthly rainfall in September in Uruguay (Montevideo)75
    75 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Uruguay (Montevideo)6
    6 (High) UV index
  • 13°C sea temperature in September in Uruguay (Montevideo)13
    13°C sea temperature

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The September weather guide for Uruguay (Montevideo) 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 Uruguay destinations

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

All Uruguay destinations

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

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How hot is it in Uruguay in September?

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

How sunny is it in Uruguay in September?

There are normally 7 hours of bright sunshine each day in Montevideo, Uruguay in September - that's 55% of daylight hours.

How warm is the sea around Uruguay in September?

The average sea temperature around Montevideo, Uruguay in September is 13°C.

Does it rain in Uruguay in September?

There are usually 9 days with some rain in Montevideo, Uruguay in September and the average monthly rainfall is 75mm.

Uruguay September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 07:03 18:26
Monday, 15th September 2025 06:44 18:36
Tuesday, 30th September 2025 06:22 18:47

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