Altai, Mongolia experiences average highs of 7°C (45°F) and lows of -3°C (27°F) throughout the year. The climate is relatively dry, with only 4 rainy days per month on average. Sunshine is abundant, averaging about 10 hours per day. Average highs have warmed by 1.3°C (2.3°F) across the available records.
Altai, Mongolia Weather & Climate 2026
Monthly climate averages for Altai, Mongolia. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Apr–Sep At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.6/10
Best: June, July, August
UV Index
5
Low
Temperature 7°C / -3°C
Feels Like 3°C / -7°C
Rainy Days 4
Rainfall 18 mm
Sunshine 10 h
Humidity 43%
Wind Speed 16 km/h
Dew Point -9°C
Snow Days 5 days
Frost Days 24 days
Hottest Month
23°C
July
Avg Low12°C
Rain8days
Coldest Month
-19°C
January
Avg High-10°C
Rain1days
Driest Month
1days
January
Avg High-10°C
Avg Low-19°C
Windiest Month
21 km/h
May (Gusts 46)
Worst Time to Visit
Consider avoiding March, April, November, December due to very cold temperatures.
Sun Position
Sunrise 04:43
Daylight 15.8h
Sunset 20:30
Live conditions—
Altai on the map · live conditions
Altai, Mongolia
- Continent
- Asia
- Country
- Mongolia
- City
- Altai
- Population
- 17.6K
- Coordinates
- 46.37°, 96.26°
Seasonal Breakdown
Spring
Mar–May
Avg High 9°C
Avg Low -3°C
Rain 5 days/mo
Summer
Jun–Aug
Avg High 22°C
Avg Low 11°C
Rain 8 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 6°C
Avg Low -4°C
Rain 3 days/mo
Winter
Dec–Feb
Avg High -8°C
Avg Low -17°C
Rain 1 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -10°C / -19°C . Feb: -5°C / -16°C . Mar: 3°C / -8°C . Apr: 9°C / -2°C . May: 15°C / 3°C . Jun: 21°C / 10°C . Jul: 23°C / 12°C . Aug: 21°C / 10°C . Sep: 15°C / 4°C . Oct: 6°C / -4°C . Nov: -2°C / -11°C . Dec: -9°C / -17°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 2 mm. Feb: 3 mm. Mar: 8 mm. Apr: 16 mm. May: 26 mm. Jun: 38 mm. Jul: 50 mm. Aug: 38 mm. Sep: 19 mm. Oct: 8 mm. Nov: 7 mm. Dec: 3 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 51%. Feb: 45%. Mar: 38%. Apr: 36%. May: 37%. Jun: 39%. Jul: 43%. Aug: 46%. Sep: 43%. Oct: 45%. Nov: 46%. Dec: 49%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 11 km/h . Feb: 13 km/h . Mar: 17 km/h . Apr: 20 km/h . May: 21 km/h . Jun: 18 km/h . Jul: 18 km/h . Aug: 17 km/h . Sep: 17 km/h . Oct: 15 km/h . Nov: 14 km/h . Dec: 11 km/h .
Sunshine
Sunshine
Sunshine: Jan: 8h. Feb: 9h. Mar: 10h. Apr: 12h. May: 12h. Jun: 13h. Jul: 12h. Aug: 11h. Sep: 11h. Oct: 9h. Nov: 8h. Dec: 7h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 3 days. Feb: 4 days. Mar: 7 days. Apr: 7 days. May: 5 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 2 days. Oct: 5 days. Nov: 5 days. Dec: 4 days.
Climate Trends
Average highs have warmed by 1.3°C (2.3°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 25°C | Jul · 23°C |
| Coldest month | Feb 2025 · -17°C | Jan · -19°C |
| Wettest month | Jun 2025 · 64 mm | Jul · 50 mm |
| Windiest month | May 2025 · 22 km/h | May · 21 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Fair June best
Excellent July best
Excellent August best
Excellent September
Fair October
Poor November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -10°C / -19°C | -15°C / -24°C | 1days (2 mm) Excellent | 7.5h Good | 51% Moderate | 2 Low | Poor | View Details |
| February | -5°C / -16°C | -11°C / -21°C | 1days (3 mm) Excellent | 8.9h Good | 45% Moderate | 3.2 Moderate | Poor | View Details |
| March | 3°C / -8°C | -2°C / -13°C | 3days (8 mm) Excellent | 10.3h Excellent | 38% Comfortable | 4.7 Moderate | Poor | View Details |
| April | 9°C / -2°C | 5°C / -7°C | 5days (16 mm) Good | 11.7h Excellent | 36% Comfortable | 5.7 High | Poor | View Details |
| May | 15°C / 3°C | 11°C / -1°C | 7days (26 mm) Good | 12.3h Excellent | 37% Comfortable | 6.5 High | Fair | View Details |
| June best | 21°C / 10°C | 18°C / 7°C | 8days (38 mm) Wet | 12.8h Excellent | 39% Comfortable | 7 High | Excellent | View Details |
| July best | 23°C / 12°C | 21°C / 10°C | 8days (50 mm) Wet | 12.3h Excellent | 43% Moderate | 6.8 High | Excellent | View Details |
| August best | 21°C / 10°C | 18°C / 8°C | 9days (38 mm) Wet | 11.4h Excellent | 46% Moderate | 6.2 High | Excellent | View Details |
| September | 15°C / 4°C | 11°C / 0°C | 5days (19 mm) Good | 10.5h Excellent | 43% Moderate | 4.8 Moderate | Fair | View Details |
| October | 6°C / -4°C | 1°C / -9°C | 3days (8 mm) Excellent | 9.3h Good | 45% Moderate | 3.4 Moderate | Poor | View Details |
| November | -2°C / -11°C | -8°C / -16°C | 2days (7 mm) Excellent | 7.7h Good | 46% Moderate | 2.2 Moderate | Poor | View Details |
| December | -9°C / -17°C | -14°C / -22°C | 1days (3 mm) Excellent | 6.9h Fair | 49% Moderate | 1.6 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Altai are June, July, August, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Altai, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Altai is July, with average daytime highs of 23°C (74°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Altai is January, with average overnight lows of -19°C (-1°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Altai is July, averaging 50mm of precipitation across 8 rainy days. An umbrella or waterproof jacket is essential.
Altai receives approximately 122 sunshine hours per year. The sunniest month is June with around 13 hours. Based on climate data for Altai.
The least favorable months to visit Altai are March, April, November, December, primarily due to very cold temperatures. For the best conditions, consider June, July, August instead.
The annual average UV index in Altai is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Altai is 43%, classified as dry. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Altai receives snow. Months with snowfall average 5 snow days and 4 cm (2 in) of accumulation, with about 24 frost days during winter.
Average wind speeds in Altai are 16 km/h (10 mph). The windiest month is May with peak winds reaching 21 km/h (13 mph) (gusts up to 46 km/h / 29 mph).
Altai averages 10 clear-sky days per month with overall cloud cover around 38%. The clearest skies occur in October.
The annual average dew point in Altai is -9°C (16°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Altai has a Cold Semi-Arid climate, classified as BSk under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Altai ranges from -7°C (19°F) to 3°C (37°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Altai. It earns a climate score of 7.5/10 with Excellent.
For June in Altai, pack Warm evening layer, Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 21°C (70°F) and 8 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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