SeasonScore
Ulaanbaatar, Mongolia
Photo: Wikimedia Commons · CC BY-SA 3.0

Mongolia

Ulaanbaatar in September

🌤️ Cool season

Cool and mostly dry.

🎒 Pack: warm jacket for evenings

Best months: Jun (9.4), Jul (9.4), Aug (9.4)

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Why September scores 9.1What goes into the score

How it works
🌡️ 17° / 4°C🌧️ 28 mm💧 dew pt 2°🍃 PM2.5 10
  • Weather comfort8.9
    • !Cool (17°C highs / 4°C lows)
    • ✓Comfortable humidity (dew point 2.2°C)
    • ✓Mostly dry (~28 mm rain)
  • Air quality9.1
    • ✓Good (within WHO guideline) (PM2.5 ~10 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline8.0
    • ·Normal precautions
Compare monthsPut September side by side with another month
SepJun
Score9.1 Excellent9.4 Excellent
Season🌤️ Cool season🌤️ Cool season
High / low17° / 4°23° / 10°
Rain28 mm47 mm
Humiditydew pt 2°dew pt 5°
PM2.510 µg/m³11 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Ulaanbaatar weather-station normals. Rainfall: Ulaanbaatar weather-station normals (national met service).

Holidays & crowdsSeptember 2027

No long holidays

No long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.

No national public holidays in Mongolia this month.

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Nature calendarBlossoms, leaves & seasons in Ulaanbaatar

  • Snowy daysIn SeptemberTypical dates
    Snow likely Sep–May (most in Dec: ~11 days)

    Average number of days with snowfall at Ulaanbaatar.

    Source: Ulaanbaatar weather-station normals (national weather service, via Wikipedia climate table)

Explore UlaanbaatarEvents, sights, food & souvenirs

Check event dates locally

Mongolia's capital and the gateway to the steppe, known for Buddhist monasteries, the national museum and as one of the world's coldest capitals.

Events in September
Golden Eagle FestivalDate variesUsually late September or early October

Kazakh eagle hunters compete with trained golden eagles.

Why go: Flights to Ölgii sell out; book early.

Where: Bayan-Ölgii province, far western Mongolia (flight from Ulaanbaatar)

Coming up later

Tsagaan Sar (Lunar New Year)Date variesLunar calendar — usually February, date moves each year

The Mongolian Lunar New Year, a major family holiday.

Why go: Many businesses close for several days.

Where: Homes and monasteries

Naadam FestivalEvery year11–15 July every year

Mongolia's national festival of wrestling, horse racing and archery.

Why go: Opening ceremony tickets and accommodation sell out; the horse races are held outside the city.

Where: National Sports Stadium and around the city