Mongolia Weather in September 2026: what to expect (7.4/10)

The month in detail

What to expect in September

Autumn in Mongolia is often underrated: 17.0°C, golden light and declining crowds. An interesting window. Rain risk remains low (25.0% of days), leaving good room for outdoor activities. Not the best window, but acceptable if dates are constrained. June (8.0/10) is significantly better if possible.

September ranks 5 out of 12 months in Mongolia. Compared to August: −5°C daytime, 15 pts fewer rainy days.

This month's conditions

What it's like in September

UV index

3 · low

no protection needed

Feels like

dry air

2°

Daylight

12.3h of daylight

Air quality

good

AQI 24

Compare

Is September the right month?

The best month in Mongolia is June (8.0/10), 0.6 pt higher than September.

See June →See all 12 months →

Context

Our verdict

Mongolia, landlocked country between Russia to the north and China to the south : 3.4 million inhabitants over 1,564,116 km² (density among the lowest in the world, 2 inhabitants/km²).

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

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Stay

Hotels & rentals · Mongolia

Expedia →

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Activities

Tours, tickets, experiences

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Flights

Multi-airline comparator

Kiwi →

🎟️ Activities & tours · Mongolia

GetYourGuide selection · free cancellation

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Affiliate link · GetYourGuide

Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a city break.

Country · Mongolia

🗣️LanguageMongol

💶CurrencyTögrög mongol (₮)

🚗DrivingRight-hand

🛡️Safety ⓘVery safe · 1/5

💰Cost of living ⓘCheap · 2/5

🌡️ Climate

🌍Climate typeTemperate

📈Climate trend ⓘStable

🔥Hottest monthJuly · 25°C

❄️Coolest monthJanuary · -13°C

🌧️Rainiest month ⓘJuly · 40%

🏛️ City break

📅Tourist peak seasonJune → August

☔Indoor sights ⓘYear-round

🚇Public transportGood

Explore

Other destinations in September

If September doesn't convince you for this destination, compare with others.

Similar climate

Nearby

NovosibirskRussia1827 km

Other top picks

San Miguel de AllendeMexico7.7

← August October →

🗺️ See all 754 destinations on the map

Location

Where is Mongolia ?

Global position + regional geographic context.

🌍 World

🔍 Geographic context

Mongolia

Temperate climate with a 8.0 → 4.2 gap between best and worst month. 10 years of ERA5 data to choose by project.

47.92°N · 106.92°E

Questions

Frequently asked questions

What is the best time to visit Mongolia?

June is the best month with 23.0°C highs, 9.0°C lows, 8.1h of sunshine and 31.0% rainy days. The months of June & July offer comparable conditions.

How many hours of sunshine does Mongolia get in June?

Mongolia averages 8.1 sunshine hours per day in June. It is the sunniest month with a climate score of 7.5/10.

What is the rainiest month in Mongolia?

November is the most unfavourable month with November has the lowest climate score of the year and the lowest climate score of the year.

What are the temperatures at night in Mongolia in June?

In June, overnight lows reach 9.0°C, while afternoon highs average 23.0°C.

Is Mongolia good in winter?

In winter (December-February), Mongolia scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains June with a score of 7.5/10.

When should you avoid Mongolia?

November is the most difficult month to visit Mongolia, with November has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.

Do you need sun protection in Mongolia in September?

The average UV index reaches 3 in September in Mongolia (low), with about 12.3h of daylight. No protection needed.