Ulaanbaatar in Summer
In summer (June, July and August), Ulaanbaatar sees average daytime highs around 21°C and overnight lows near 9°C, with 189 mm of precipitation over about 31 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 21°C. The sky is clear or mostly clear about 29% of the time across summer, and the air most often feels dry.
Summer is Ulaanbaatar's best season of the year to visit on our travel score. For the whole year in context, see Ulaanbaatar's year-round climate.
- Avg daytime high
- 21°C
- warmest season of the year
- Avg overnight low
- 9°C
- Precipitation
- 189 mm
- 31 wet days
- Avg wind
- 9 km/h
- Travel score
- 6.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Ulaanbaatar in Summer
Across summer, daytime highs hold fairly steady around 21°C.
A typical summer day in Ulaanbaatar reaches about 21°C and drops to 9°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Ulaanbaatar
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ulaanbaatar weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -17° / -28° | 2 | 0.5 | 0.7 | 8.6 | 0.0 |
| Feb | -11° / -24° | 3 | 1.2 | 1.5 | 9.9 | 0.0 |
| Mar | -2° / -15° | 7 | 2.2 | 2.7 | 11.6 | 0.0 |
| Apr | 8° / -5° | 16 | 4.3 | 3.6 | 13.4 | 1.3 |
| May | 15° / 1° | 35 | 6.7 | 3 | 14.9 | 4.8 |
| Jun | 20° / 8° | 55 | 9.5 | 0.2 | 15.7 | 6.3 |
| Jul | 22° / 11° | 66 | 11.2 | 0 | 15.4 | 6.4 |
| Aug | 20° / 9° | 68 | 10.7 | 0 | 14.1 | 6.2 |
| Sep | 14° / 2° | 39 | 7.2 | 1.5 | 12.4 | 4.6 |
| Oct | 5° / -6° | 15 | 3.8 | 3.3 | 10.6 | 0.7 |
| Nov | -7° / -18° | 6 | 2.1 | 2.6 | 9 | 0.0 |
| Dec | -15° / -25° | 2 | 0.9 | 1.3 | 8.3 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 29% of the time across summer.
Chance of precipitation in Summer
Ulaanbaatar gets around 189 mm of rain and snow over 31 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 30 min in early June to 13 h 18 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.8 kWh/m².
Is summer a good time to visit Ulaanbaatar?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Ulaanbaatar for sightseeing.
What to pack for Ulaanbaatar in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Ulaanbaatar sees daytime highs around 21°C and nights near 9°C. Pack sun protection. Worth having: light clothes, a warm layer and rain gear. About 31 days see rain.
UV index in Ulaanbaatar in Summer
Clear-sky midday UV across summer averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ulaanbaatar peaks around July 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 6 | 7 | 7 | 8 | 8 | 5 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | High | High | Very high | Very high | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 3 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 7 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 5 | Moderate |
| Oct | 2 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Ulaanbaatar in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Ulaanbaatar is worst in July — around 135 µg/m³ PM2.5 (unhealthy), about 3.3× the cleanest month (October, 41 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Ulaanbaatar's WHO annual average of 60 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 56 | 55 | 48 | 48 | 54 | 78 | 135 | 73 | 42 | 41 | 48 | 41 |
| Level | Unhealthy | Unhealthy | Poor | Poor | Poor | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 56 | Unhealthy |
| Feb | 55 | Unhealthy |
| Mar | 48 | Poor |
| Apr | 48 | Poor |
| May | 54 | Poor |
| Jun | 78 | Unhealthy |
| Jul | 135 | Unhealthy |
| Aug | 73 | Unhealthy |
| Sep | 42 | Poor |
| Oct | 41 | Poor |
| Nov | 48 | Poor |
| Dec | 41 | Poor |
Where is Ulaanbaatar?
Ulaanbaatar sits at 47.9°N, 106.9°E, 1,284 m above sea level, in Mongolia. The nearest listed city is Zuunmod, 23 km away.
Topography around Ulaanbaatar
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ulaanbaatar.
Within 3 km, the terrain around Ulaanbaatar has only modest variations in elevation — a maximum elevation change of 247 m around an average of 1,304 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,018 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,795 m.
The land around Ulaanbaatar is covered by artificial surfaces (81%) within 3 km, grassland (57%) and artificial surfaces (21%) within 16 km, and grassland (79%) within 80 km.
Mongolia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E / F
- 220 V · 50 Hz
- Prices
- ≈ 34% of US
- price level, 2025
- GDP per capita
- $7,108
- 2025
- Happiness
- 5.9 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 5.9
- per 100k, 2023
- Road deaths
- 21
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 447
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ulaanbaatar (47.9077°, 106.8832°, elevation 1,284 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.