Weather in Ulan Bator
Ulaanbaatar · 844,818 inhabitants · Wednesday, October 28 · updated 22:37
Detailed forecast
Weather charts for Ulan Bator · 7 days
Temperatures over 7 days
Hourly detail
Climate of Ulan Bator
Average lows are below freezing from October to April, down to −28 °C in January.
Of the 16 cities of 20,000+ inhabitants SkiesAtlas covers in Mongolia, Ulan Bator has the third lowest mean temperature.
July is the warmest month, with average highs of 24 °C. January is the coldest, with average lows of −28 °C. Their mean temperatures differ by 40 °C.
About 350 mm of rain falls in a typical year, less than in 93% of the 28,403 cities of 20,000+ inhabitants on SkiesAtlas.
This week’s forecast highs average 0 °C, 6 °C below the October normal (6 °C).
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | −16 °C | −28 °C | 4 mm |
| Feb | −11 °C | −23 °C | 6 mm |
| Mar | −1 °C | −13 °C | 10 mm |
| Apr | 8 °C | −4 °C | 20 mm |
| May | 15 °C | 2 °C | 38 mm |
| Jun | 20 °C | 8 °C | 58 mm |
| Jul | 24 °C | 12 °C | 71 mm |
| Aug | 20 °C | 10 °C | 72 mm |
| Sep | 14 °C | 3 °C | 42 mm |
| Oct | 6 °C | −6 °C | 18 mm |
| Nov | −7 °C | −17 °C | 9 mm |
| Dec | −15 °C | −25 °C | 5 mm |
| Year | 5 °C | −7 °C | 350 mm |
Climate normals: ERA5 reanalysis 1991–2020 (Copernicus/ECMWF), computed by SkiesAtlas for 47.91° N, 106.88° E. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air quality & pollen in Ulan Bator
CAMS data (Copernicus) · air quality and pollen refreshed several times a day.
Rain in Ulan Bator: live radar and next-hour forecast
Will it rain in Ulan Bator? Track precipitation live on the radar and anticipate showers in the next hour — the +1 h extrapolation is based on the real movement of rain cells.
Full-screen radar · rain within the hourMoon calendar for Ulan Bator
Rise and set in local time (Asia/Ulaanbaatar) · phases and illumination computed by SkiesAtlas (synodic model).
Weather history for Ulan Bator
What was the weather in Ulan Bator on a past date? Pick a day — ERA5 reanalysis data (ECMWF / Copernicus C3S), available up to one week ago.
The weather in Ulan Bator
Find the full weather for Ulan Bator, Ulaanbaatar: current conditions, forecast by time of day (morning, afternoon, evening) and a 7-day trend. Right now the sky is “clear sky” with -7 °C (feels like -11 °C) and wind at 8 km/h.
Today, temperatures range from -8 °C to 0 °C, with no significant precipitation. Forecast computed by our multi-model engine SkiesAtlas (ECMWF-AIFS, NOAA GFS, DWD ICON): cloud cover calibrated on METAR observations, convective energy (CAPE) for storms.
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Weather API for Ulan Bator
Get the Ulan Bator forecast in JSON for your website or app, plus air quality, tides and astronomy. Free API key, no credit card required.
How is this forecast computed? Multi-model engine, verified daily against 1125 weather stations