Weather in Ulaanbaatar - 14-day forecast

Detailed weather forecast for Ulaanbaatar, Mongolia: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Ulaanbaatar

today🌧️ 12°💧 3.9 mm

Sun🌧️ 12°💧 0.3 mm

Mon☀️ 13°💧 3.7 mm

Tue☀️ 13°💧 3.1 mm

Wed🌤️ 15°💧 0.2 mm

Thu☀️ 14°night 10°

Fri🌤️ 18°💧 0.2 mm

Sat🌤️ 20°💧 13.7 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Sunday 6 Sept in Ulaanbaatar, the forecast high is 12°C. Typical daytime temperatures at this time of year range from 12°C to 22°C, so it will be cooler than usual. It is cooler than 86% of similar days.

Saturday 5 Sept

12°Ccooler than usual

usually 13°C–22°C

cooler than 85% of similar days

night: warmer than usual rain: exceptionally wet wind: stronger than usual

Sunday 6 Sept

12°Ccooler than usual

usually 12°C–22°C

cooler than 86% of similar days

night: warmer than usual rain: typical rainfall wind: typical

Monday 7 Sept

13°Ccooler than usual

usually 12°C–21°C

cooler than 76% of similar days

night: warmer than usual rain: exceptionally wet wind: typical

Tuesday 8 Sept

13°Ccooler than usual

usually 12°C–21°C

cooler than 73% of similar days

night: exceptionally warm rain: exceptionally wet wind: exceptionally light

Wednesday 9 Sept

15°Cnear normal

usually 12°C–21°C

night: exceptionally warm rain: typical rainfall wind: typical

Thursday 10 Sept

14°Cnear normal

usually 11°C–20°C

night: exceptionally warm rain: less rain than usual wind: exceptionally light

Friday 11 Sept

18°Cnear normal

usually 11°C–20°C

night: exceptionally warm rain: typical rainfall wind: exceptionally light

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 16°C by day. The coolest year was 1992 (12°C) and the warmest was 2007 (22°C). The current forecast averages 14°C - lower than in 73% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Ulaanbaatar

Ulaanbaatar - 14-day weather forecast infographic

Ulaanbaatar 30 & 45-day weather - long-range outlook

Next 16 days · forecast

15°

around 10° at night · days with rain: 7

Weeks 3-4 · avg for September

16°

around 3° at night · rain chance 36%

Weeks 5-7 · avg for October

7°

around -7° at night · rain chance 14%

The 30 & 45-day outlook for Ulaanbaatar: the next 16 days are a numerical forecast updated daily - on average 15° by day and 10° at night. Further out we rely on multi-year climate averages: around 16° in September, and about 7° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Ulaanbaatar

Saturday5 September 2026

🌧️12°moderate rain

sunrise 06:15 · sunset 19:27 · night 7° · evening 7° · rain 3.85 mm · humidity 56% · wind 8 m/s · clouds 56%

Sunday6 September 2026

🌧️12°light rain

sunrise 06:16 · sunset 19:25 · night 6° · evening 12° · rain 0.33 mm · humidity 57% · wind 7 m/s · clouds 41%

Monday7 September 2026

☀️13°clear sky

sunrise 06:18 · sunset 19:23 · night 6° · evening 12° · rain 3.66 mm · humidity 36% · wind 6 m/s · clouds 100%

Tuesday8 September 2026

☀️13°clear sky

sunrise 06:19 · sunset 19:21 · night 9° · evening 16° · rain 3.12 mm · humidity 40% · wind 3 m/s · clouds 9%

Wednesday9 September 2026

🌤️15°scattered clouds

sunrise 06:20 · sunset 19:19 · night 9° · evening 17° · rain 0.15 mm · humidity 38% · wind 6 m/s · clouds 27%

Thursday10 September 2026

☀️14°clear sky

sunrise 06:22 · sunset 19:17 · night 10° · evening 18° · humidity 56% · wind 4 m/s · clouds 20%

Friday11 September 2026

🌤️18°a few clouds

sunrise 06:23 · sunset 19:15 · night 13° · evening 22° · rain 0.18 mm · humidity 42% · wind 3 m/s · clouds 18%

Saturday12 September 2026

🌤️20°a few clouds

sunrise 06:24 · sunset 19:13 · night 14° · evening 23° · rain 13.74 mm · humidity 36% · wind 4 m/s · clouds 11%

Sunday13 September 2026

☁️20°overcast clouds

sunrise 06:26 · sunset 19:11 · night 14° · evening 24° · humidity 28% · wind 2 m/s · clouds 94%

Monday14 September 2026

☀️20°clear sky

sunrise 06:27 · sunset 19:08 · night 16° · evening 24° · rain 0.21 mm · humidity 31% · wind 3 m/s · clouds 30%

Tuesday15 September 2026

☁️18°overcast clouds

sunrise 06:29 · sunset 19:06 · night 16° · evening 21° · rain 3.78 mm · humidity 42% · wind 6 m/s · clouds 100%

Wednesday16 September 2026

🌧️18°moderate rain

sunrise 06:30 · sunset 19:04 · night 9° · evening 15° · rain 6.15 mm · humidity 54% · wind 8 m/s · clouds 47%

Thursday17 September 2026

🌧️7°light rain

sunrise 06:31 · sunset 19:02 · night 7° · evening 7° · rain 1.53 mm · humidity 89% · wind 3 m/s · clouds 100%

Friday18 September 2026

☁️8°overcast clouds

sunrise 06:33 · sunset 19:00 · night 7° · evening 13° · humidity 83% · wind 5 m/s · clouds 100%

Saturday19 September 2026

☀️14°clear sky

sunrise 06:34 · sunset 18:58 · night 10° · evening 17° · humidity 52% · wind 3 m/s · clouds 98%

Sunday20 September 2026

☁️16°broken clouds

sunrise 06:35 · sunset 18:56 · night 13° · evening 19° · humidity 43% · wind 2 m/s · clouds 65%

UV index in Ulaanbaatar - is it safe to sunbathe?

Today the UV index in Ulaanbaatar is 3 (moderate) - unprotected fair skin can burn in about 65 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

Ulaanbaatar weather through the year

Warmest, driest months on average: May, June, July, August.

Upcoming public holidays in Mongolia: Chinggis Khaan Day — 10 November · Republic Day — 26 November · Independence Day — 29 December.

Nearby and related places

SuhbaatarBulganArvayheerUliastayOelgiyMurunkuren

FAQ - Ulaanbaatar weather

What is the weather like in Ulaanbaatar today?

Today it is about 12° during the day and 7° at night, moderate rain.

How far ahead can I check the forecast for Ulaanbaatar?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.