Ulaanbaatar weather in September 2025

Expect 15°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Ulaanbaatar in September. Check more long-term weather averages for Ulaanbaatar in September before you book your next holiday to Mongolia in 2025/2026.

  • 15°C maximum daytime temperature in September in Ulaanbaatar15
    15°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Ulaanbaatar9
    9 days with some rainfall
  • 1°C minimum night-time temperature in September in Ulaanbaatar1
    1°C min night temperature
  • 13 hours of daylight per day in September in Ulaanbaatar13
    13 hours of daylight per day
  • No heat & humidity in September in Ulaanbaatar0
    No heat & humidity
  • 42 mm monthly rainfall in September in Ulaanbaatar42
    42 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Ulaanbaatar5
    5 (Moderate) UV index

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The September weather guide for Mongolia (Ulaanbaatar) 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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How warm is it in Ulaanbaatar in September?

Daytime temperatures usually reach 15°C in Ulaanbaatar in September, falling to 1°C at night.

How sunny is it in Ulaanbaatar in September?

There are normally 8 hours of bright sunshine each day in Ulaanbaatar in September - that's 66% of daylight hours.

Does it rain in Ulaanbaatar in September?

There are usually 9 days with some rain in Ulaanbaatar in September and the average monthly rainfall is 42mm.

Ulaanbaatar September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:10 19:34
Monday, 15th September 2025 06:29 19:05
Tuesday, 30th September 2025 06:50 18:34

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