Mongolia · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Ulaanbaatar are June, July and August, when daytime temperatures are agreeable and rainfall is relatively low.
Ulaanbaatar sees its warmest weather in July, when daytime highs average around 23°C, and its coolest in January (around -13°C).
Annual precipitation totals roughly 229mm — July is typically the wettest month (~60mm) and January the driest (~2mm).
Rainfall is spread fairly evenly through the year, so no single season is dramatically wetter than the rest.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 61 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | -13° / -26°C | 2mm | 🤔 Fair |
| February | -8° / -23°C | 2mm | 🤔 Fair |
| March | 0° / -15°C | 4mm | 🤔 Fair |
| April | 8° / -5°C | 6mm | 🤔 Fair |
| May | 16° / 2°C | 17mm | 👍 Good |
| June | 21° / 8°C | 39mm | 🌟 Great |
| July | 23° / 12°C | 60mm | 🌟 Great |
| August | 21° / 9°C | 60mm | 🌟 Great |
| September | 15° / 2°C | 24mm | 👍 Good |
| October | 6° / -5°C | 8mm | 🤔 Fair |
| November | -4° / -15°C | 4mm | 🤔 Fair |
| December | -11° / -22°C | 3mm | 🤔 Fair |
January in Ulaanbaatar is freezing, with daytime highs below zero, with average daytime highs around -13°C (9°F) and nighttime lows near -26°C (-15°F). Expect roughly 2mm of precipitation, and rain is rare.
🎒 What to pack — insulated winter coat · thermal layers · gloves and a warm hat
February in Ulaanbaatar is freezing, with daytime highs below zero, with average daytime highs around -8°C (18°F) and nighttime lows near -23°C (-10°F). Expect roughly 2mm of precipitation, and rain is rare.
🎒 What to pack — insulated winter coat · thermal layers · gloves and a warm hat
March in Ulaanbaatar is freezing, with daytime highs below zero, with average daytime highs around 0°C (31°F) and nighttime lows near -15°C (5°F). Expect roughly 4mm of precipitation, and rain is rare.
🎒 What to pack — insulated winter coat · thermal layers · gloves and a warm hat
April in Ulaanbaatar is cold, with average daytime highs around 8°C (46°F) and nighttime lows near -5°C (24°F). Expect roughly 6mm of precipitation, and rain is rare.
🎒 What to pack — warm coat · sweaters and layers · scarf
May in Ulaanbaatar is mild, with average daytime highs around 16°C (60°F) and nighttime lows near 2°C (36°F). Expect roughly 17mm of precipitation, and rain is rare.
🎒 What to pack — light jacket · layers for cool evenings
June in Ulaanbaatar is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 8°C (47°F). Expect roughly 39mm of precipitation, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
July in Ulaanbaatar is pleasantly warm, with average daytime highs around 23°C (73°F) and nighttime lows near 12°C (53°F). Expect roughly 60mm of precipitation, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
August in Ulaanbaatar is pleasantly warm, with average daytime highs around 21°C (70°F) and nighttime lows near 9°C (49°F). Expect roughly 60mm of precipitation, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
September in Ulaanbaatar is mild, with average daytime highs around 15°C (59°F) and nighttime lows near 2°C (36°F). Expect roughly 24mm of precipitation, with little rainfall.
🎒 What to pack — light jacket · layers for cool evenings
October in Ulaanbaatar is cold, with average daytime highs around 6°C (43°F) and nighttime lows near -5°C (23°F). Expect roughly 8mm of precipitation, and rain is rare.
🎒 What to pack — warm coat · sweaters and layers · scarf
November in Ulaanbaatar is freezing, with daytime highs below zero, with average daytime highs around -4°C (24°F) and nighttime lows near -15°C (4°F). Expect roughly 4mm of precipitation, and rain is rare.
🎒 What to pack — insulated winter coat · thermal layers · gloves and a warm hat
December in Ulaanbaatar is freezing, with daytime highs below zero, with average daytime highs around -11°C (12°F) and nighttime lows near -22°C (-8°F). Expect roughly 3mm of precipitation, and rain is rare.
🎒 What to pack — insulated winter coat · thermal layers · gloves and a warm hat