Winter (December to February)
Sharp cold with highs around -10° and lows near -21°, almost always dry (1 rainy days per month on average). Not an ideal time for a leisure trip.
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Climate · 10-year averages
When to visit Oulan-Bator?
Best time to visit Oulan-Bator: from May to September. Month-by-month temperatures, rainfall and sunshine, based on ten years of weather data.
Best time to go
From May to September
Hottest month
July · 24°
Coldest month
January · -24°
Wettest month
July · 86 mm
Climate month by month
Bars: monthly rainfall. Lines: average highs and lows. Month color: our travel comfort index.
- JanuaryÀ éviter
-12° / -24°
- Rain
- 1 mm · 1 d
- Sunshine
- 8.0 h/day
- Humidity
- 69%
- FebruaryÀ éviter
-8° / -20°
- Rain
- 3 mm · 1 d
- Sunshine
- 9.4 h/day
- Humidity
- 64%
- MarchÀ éviter
3° / -10°
- Rain
- 8 mm · 2 d
- Sunshine
- 10.7 h/day
- Humidity
- 44%
- AprilMitigé
10° / -3°
- Rain
- 16 mm · 5 d
- Sunshine
- 11.1 h/day
- Humidity
- 40%
- MayTrès bien
16° / 2°
- Rain
- 31 mm · 7 d
- Sunshine
- 11.9 h/day
- Humidity
- 43%
- JuneIdéal
22° / 9°
- Rain
- 48 mm · 9 d
- Sunshine
- 12.1 h/day
- Humidity
- 53%
- JulyTrès bien
24° / 13°
- Rain
- 86 mm · 12 d
- Sunshine
- 11.2 h/day
- Humidity
- 62%
- AugustTrès bien
22° / 10°
- Rain
- 78 mm · 12 d
- Sunshine
- 11.2 h/day
- Humidity
- 67%
- SeptemberTrès bien
16° / 4°
- Rain
- 41 mm · 7 d
- Sunshine
- 9.8 h/day
- Humidity
- 62%
- OctoberÀ éviter
7° / -4°
- Rain
- 12 mm · 4 d
- Sunshine
- 9.1 h/day
- Humidity
- 55%
- NovemberÀ éviter
-4° / -14°
- Rain
- 9 mm · 3 d
- Sunshine
- 7.9 h/day
- Humidity
- 59%
- DecemberÀ éviter
-11° / -21°
- Rain
- 3 mm · 1 d
- Sunshine
- 7.4 h/day
- Humidity
- 67%
2014–2023 averages from the ERA5 reanalysis (Copernicus) via Open-Meteo. A day counts as a “rainy day” from 1 mm of rain.
Our take, season by season
Spring (March to May)
Cool weather with highs around 10° and lows near -4°, a few showers (4 rainy days per month on average). Not an ideal time for a leisure trip.
Summer (June to August)
Mild weather with highs around 23° and lows near 11°, regular rain (11 rainy days per month on average). It's a great time to go.
Fall (September to November)
Sharp cold with highs around 6° and lows near -5°, a few showers (5 rainy days per month on average). Not an ideal time for a leisure trip.
Frequently asked questions
- When is the best time to visit Oulan-Bator?
- The best time to visit Oulan-Bator is from May to September, with highs between 16° and 24° and few rainy days.
- What is the hottest month in Oulan-Bator?
- July is the hottest month, with an average high of 24 °C.
- What is the coldest month in Oulan-Bator?
- January is the coldest month, with an average low of -24 °C.
- When does it rain the most in Oulan-Bator?
- July is the wettest month (86 mm, about 12 rainy days). The driest is January (1 mm).
- When should you avoid Oulan-Bator?
- The least favorable months are from October to March: too hot, too cold, or too rainy to make the most of your trip.
More practical info: Mongolia
- Country guideEverything about a country on one page: time, weather, currency, plugs, emergency numbers, tipping, visas.
- WeatherTemperature, rain, wind, and UV index for every capital.
- Air qualityPollution, fine particulate matter, and ozone, with a 36-hour forecast.
- Local timeLive clock, time zone, and time difference from where you are.
- Public holidaysEvery public holiday of the year, plus the next one coming up.
- Power OutletsPlug type, voltage, and whether your devices need an adapter.
- Driving SideWhich side of the road to drive on and which license you need before renting a car.
- Dialing CodesHow to call a country from abroad.
- Salat TimesFajr, Dhuhr, Asr, Maghrib, Isha, and Imsak times in every capital.
- QiblaReal-time compass pointing to the Kaaba from your GPS location.
- Visa requirements from FranceDo you need a visa for Mongolia?