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Ulaanbaatar weather in September 2026
Expect daytime maximum temperatures of 15°C in Ulaanbaatar, Mongolia in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 42 mm of rainfall in the month.
- 15°C max day temperature
15 - 8 hours of sunshine per day
- 9 days with some rainfall
9 - 1°C min night temperature
1 - 13 hours of daylight per day
13 - No heat & humidity
0 - 42 mm of monthly rainfall
42 - 5 (Moderate) UV index
5
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Recommended for Mongolia
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)
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 2026. Select a month to view Ulaanbaatar sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Tuesday, 1st September 2026 | 06:10 | 19:34 |
| Tuesday, 15th September 2026 | 06:29 | 19:06 |
| Wednesday, 30th September 2026 | 06:50 | 18:35 |
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