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When to go · Ulaanbaatar

Ulaanbaatar in December

Avoid month. Deep cold and smog.

Key facts

Verdict
Avoid
Temperature
−13°C (9°F) / −23°C (−9°F)
average high / low
Rain days
1
Crowds
Low
Mongolia overall
Prices
Low
Mongolia overall

Verdict

AvoidVoykit month rating for Ulaanbaatar

Deep cold and smog.

All twelve months in one grid — weather, crowds and prices, with gaps left as unknown.

Is another month better than December?

December is rated avoid. These months rate higher:

Weather in December

Long-term averages
  • UlaanbaatarHighs around -13 °C (9 °F), lows around -23 °C (−9 °F), rain on about 1 day
  • Ulaanbaatar and the centre, Mongolia · Ulaanbaatar, Terelj, Kharkhorin, Orkhon valleysmoke haze

    Coldest capital in the world: January averages about −20 °C (−4 °F). Coal and ger-stove smoke make winter air among the worst anywhere Nov–Feb. Summer is 20–28 °C (68–82 °F) by day with afternoon showers in July–August.

Long winter season

Deep cold, snow and ice, quiet museums, Tsagaan Sar in Feb.

Watch: Smog, −20 to −30 °C, ice, closed camps.

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Independence Day

    29 December · Citywide

    Public holiday; some offices closed.

  • New Year

    31 Dec–1 Jan · Sukhbaatar Square

    Lights and fireworks in deep cold; restaurants book out.

Crowds and prices

Crowds · Mongolia overall
Low
Prices · Mongolia overall
Low

Mongolia overall: Deep cold and smog; Ulaanbaatar only, with good layers.

Compare two months

Weather, crowds and prices for any two months in Ulaanbaatar, side by side.

  • Verdict

    Dec: Avoid

    Jun: Great (better)

  • Daytime high

    Dec: -13 °C (9 °F)

    Jun: 22 °C (72 °F)

  • Night low

    Dec: -23 °C (−9 °F)

    Jun: 9 °C (48 °F)

  • Rain days

    Dec: 1 (better)

    Jun: 9

  • Crowds

    Dec: Low

    Jun: Medium

  • Prices

    Dec: Low

    Jun: Medium

  • Festivals listed

    Dec: 2

    Jun: 1

December: Deep cold and smog.

June: Warm, long days; camps open.

Ulaanbaatar: figures are long-term averages from this guide, not a forecast.

What to pack

  • A warm coat, hat and gloves for mornings and evenings

Build the full packing list for your trip →

Across Mongolia in December →