Mongolia
Ulaanbaatar in September: weather & travel advice
This month's data profile
Strong month under the current formula
Ulaanbaatar in September is climatically well suited to active holidays and hiking and city breaks. The average daily high is around 15 °C. With about 6 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
69/100 · #5
Warmth
#5
Dryness
#9
Sun
#7
Published best categories: Active
Ulaanbaatar · SeptemberPhoto: Ulaanbaatar City Tourism Department · CC BY-SA 4.0Climate facts
- Average high
- 15 °C
- Average low
- 1 °C
- Rainy days (est.)
- 6 rainy days (est.)
- Sun (est.)
- 5 h/day
- Humidity
- 62 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| August | 21 | 8 | 12 | 68 | 6.4 | 64 | 2.3 | 77 |
| September (selected) | 15 | 1 | 6 | 30 | 5.2 | 62 | 2.6 | 69 |
| October | 5 | -6 | 3 | 10 | 3.7 | 66 | 2.6 | 54 |
How do the previous and next months compare?
Baseline: September (69/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| August | +8 | +6.5 °C | +7 °C | +5.5 | +38.2 mm | +1.2 h | +1.6 % | -0.3 m/s |
| October | -15 | -9.9 °C | -7.3 °C | -3.5 | -19.2 mm | -1.5 h | +3.7 % | +0.1 m/s |
All twelve months in context
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Where to stay in Ulaanbaatar
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Frequently asked questions
How warm is Ulaanbaatar in September?
The average daily high is around 15 °C, with an average daily low of about 1 °C.
Does it rain a lot in Ulaanbaatar in September?
The curated estimate is about 6 rainy days per month, not a directly measured long-term average. Total precipitation averages around 30 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Ulaanbaatar?
By the climate score, May, June, July and August are the strongest months for Ulaanbaatar. September is not among them.