Latvia weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Latvia in September. Check more long-term weather averages for Latvia in September before you book your next holiday to Latvia in 2025/2026.

  • 16°C maximum daytime temperature in September in Latvia (Riga)16
    16°C max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in September in Latvia (Riga)16
    16 days with some rainfall
  • 8°C minimum night-time temperature in September in Latvia (Riga)8
    8°C min night temperature
  • 13 hours of daylight per day in September in Latvia (Riga)13
    13 hours of daylight per day
  • No heat & humidity in September in Latvia (Riga)0
    No heat & humidity
  • 73 mm monthly rainfall in September in Latvia (Riga)73
    73 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Latvia (Riga)3
    3 (Moderate) UV index
  • 15°C sea temperature in September in Latvia (Riga)15
    15°C sea temperature

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The September weather guide for Latvia (Riga) 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 Latvia destinations

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

All Latvia destinations

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

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How warm is it in Latvia in September?

Daytime temperatures usually reach 16°C in Riga, Latvia in September, falling to 8°C at night.

How sunny is it in Latvia in September?

There are normally 5 hours of bright sunshine each day in Riga, Latvia in September - that's 40% of daylight hours.

How warm is the sea around Latvia in September?

The average sea temperature around Riga, Latvia in September is 15°C.

Does it rain in Latvia in September?

There are usually 16 days with some rain in Riga, Latvia in September and the average monthly rainfall is 73mm.

Latvia September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:26 19:20
Monday, 15th September 2025 05:55 18:42
Tuesday, 30th September 2025 06:25 18:01

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