10-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Mainly clear
-5°
Feels like -9°
Wind↑ E 9 km/h
Humidity 57 %
Evening
Clear sky
-2°
Feels like -2°
Wind↑ ENE 4 km/h
Humidity 46 %
11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Clear sky
-4°
Feels like -7°
Wind↑ NNE 7 km/h
Humidity 55 %
Evening
Partly cloudy
-4°
Feels like -4°
Wind↑ NNW 4 km/h
Humidity 79 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Mainly clear
-7°
Feels like -11°
Wind↑ NNW 6 km/h
Humidity 90 %
Evening
Clear sky
-8°
Feels like -11°
Wind↑ NNW 6 km/h
Humidity 90 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Partly cloudy
-10°
Feels like -10°
Wind↑ E 4 km/h
Humidity 83 %
Evening
Light snow
-7°
Feels like -7°
Wind↑ E 4 km/h
Humidity 94 %
💧 1.0 mm
Ulan Bator forecast in charts · next 7 days
The week ahead: highs and lows
▲ This week runs +2.7° warmer than usual
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Ulan Bator climate: what a normal year looks like
Nights typically freeze from October to April, the coldest averaging −28 °C in January.
Ranked against the 16 towns of 20,000+ people in Mongolia, Ulan Bator has the third lowest mean temperature.
The hottest stretch is July, when afternoons average 24 °C; the coldest is January, when nights average −28 °C. Between those two months the average temperature changes by 40 °C.
A normal year brings roughly 350 mm of rain — less than 93% of the towns of 20,000+ people we compared it with.
Forecast highs for the coming week average −2 °C, 8 °C cooler than a normal October (6 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
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
Whole year
5 °C
−7 °C
350 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 47.91° N, 106.88° E, 1991–2020. 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 you breathe in Ulan Bator: pollution and pollen
2/6
Fair
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.511µg/m³
PM1011µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Ulan Bator
Rain observed over the last two hours by official weather radars around Ulan Bator, followed by the radar forecast for the next hour where the weather service provides one.
Rain radarLast two hours, then forecast where available · drag the timeline
No open weather radar covers Ulan Bator yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Ulan Bator
Waning gibbous
79 % illuminated · 19.3 days
Rise 17:25 Set 09:38
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Wed11/113%
Moonrise and moonset in local time (Asia/Ulaanbaatar); phase and lit fraction from a synodic calculation.
Look up a past day in Ulan Bator
Curious about the weather in Ulan Bator on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Ulan Bator weather at a glance
This page gathers everything about the weather in Ulan Bator, Ulaanbaatar: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “clear sky”, it is -14 °C (feels like -19 °C) and the wind blows at 8 km/h.
Expected range today: -13 °C to -3 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Ulan Bator weather data for developers
Use the Ulan Bator forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
