Mongolia Ulaanbaatar Weather in May — Climate Guide
May in Ulaanbaatar is moderate
Ulaanbaatar Weather in May — Quick Answer
As of 2026- Avg temp
- 16° / 2°
- Rainfall
- 16mm · 6 days
- Crowds
- Moderate
As of 2026, Ulaanbaatar in May averages a high of 16°C and low of 2°C with 16mm of rain over about 6 days. Pleasant late spring — warm days near 16°C, cool nights just above freezing. A daytime T-shirt-and-light-jacket combination works, with a warmer layer for evenings on the steppe. UV climbs at altitude, so bring sunscreen and sunglasses.
May is moderate for Ulaanbaatar.
May is when Ulaanbaatar genuinely comes into season. Days warm to around 16°C, the wind eases from April's peak, and the steppe finally turns green. Nights are still cool, just above freezing, but the harsh edge of the cold is gone.
Hustai National Park is especially good now — late spring is foaling season for the reintroduced Przewalski's horses (takhi), and the grassland is fresh. Terelj's ger camps are fully open, horse trekking resumes, and day trips to the Genghis Khan Statue are comfortable.
Travel score
Ulaanbaatar May Weather Stats
Avg High
16°C
Avg Low
2°C
Rainy Days
6
16mm total
Sunshine
9.5h
Daily avg
Humidity
45%
comfortable and dry
UV Index
6
High
Wind
13 km/h
Gusts 34
Crowds
Moderate
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
18 μg/m³
PM10
60 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
15°C
Nighttime
0°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 34 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- Steppe greens up; scenic countryside
- Wind easing, comfortable days (~16°C)
- Foaling season at Hustai
- Before peak crowds and prices
Cons
- Nights still cool (around 2°C)
- Occasional late cold snaps
- Strong UV at altitude
- Rain beginning to increase
May Events & Festivals
- Steppe turns green; foaling season for wild horses at Hustai
- Wind easing from April's peak
- Good early-season window before peak crowds
Ulaanbaatar in May — Full Picture
May is when Ulaanbaatar genuinely comes into season. Days warm to around 16°C, the wind eases from April's peak, and the steppe finally turns green. Nights are still cool, just above freezing, but the harsh edge of the cold is gone.
Hustai National Park is especially good now — late spring is foaling season for the reintroduced Przewalski's horses (takhi), and the grassland is fresh. Terelj's ger camps are fully open, horse trekking resumes, and day trips to the Genghis Khan Statue are comfortable.
May sits in a sweet spot: warm enough to enjoy the countryside, before the July Naadam crowds and the summer rain peak. It's one of the better months to visit, with moderate prices and manageable crowds. The main caveat is that nights on the steppe are still chilly, so pack a warm layer even in fine weather.
What to Wear & What to Pack
Pleasant late spring — warm days near 16°C, cool nights just above freezing. A daytime T-shirt-and-light-jacket combination works, with a warmer layer for evenings on the steppe. UV climbs at altitude, so bring sunscreen and sunglasses.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current7.7°C
-5°C
4.3/mo
Summer (Jun·Jul·Aug)
22.3°C
10.7°C
11.3/mo
Autumn (Sep·Oct·Nov)
6.3°C
-5.7°C
4.7/mo
Winter (Dec·Jan·Feb)
-13.3°C
-23.7°C
2/mo
Ulaanbaatar Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| -16° | -26° | 2d·2mm | 5.5h | 70% | 1 | Quiet | Low season | |
| -11° | -22° | 2d·2mm | 7h | 68% | 2 | Quiet | Low season | |
| -1° | -13° | 3d·3mm | 8h | 55% | 3 | Quiet | Low season | |
| 8° | -4° | 4d·7mm | 8.5h | 45% | 4 | Quiet | Low season | |
| 16° | 2° | 6d·16mm | 9.5h | 45% | 6 | Moderate | Shoulder | |
| June (Best) | 21° | 8° | 9d·40mm | 10h | 50% | 7 | Busy | Peak |
| July (Best) | 24° | 13° | 12d·65mm | 9.5h | 55% | 8 | Very busy | Peak |
| August (Best) | 22° | 11° | 13d·70mm | 9h | 58% | 7 | Busy | Peak |
| 16° | 4° | 7d·23mm | 9h | 50% | 5 | Moderate | Shoulder | |
| 7° | -5° | 4d·6mm | 7.5h | 50% | 3 | Quiet | Low season | |
| -4° | -16° | 3d·4mm | 6h | 60% | 2 | Quiet | Low season | |
| -13° | -23° | 2d·2mm | 5h | 68% | 1 | Quiet | Low season |
View Other Months
Ulaanbaatar May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Ulaanbaatar?
Ulaanbaatar in May is moderate. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Ulaanbaatar in May?
Ulaanbaatar May averages a high of 16°C and a low of 2°C.
Does it rain much in Ulaanbaatar in May?
Ulaanbaatar May averages 16mm of rainfall over about 6 rainy days.
What should I wear in Ulaanbaatar in May?
Pleasant late spring — warm days near 16°C, cool nights just above freezing. A daytime T-shirt-and-light-jacket combination works, with a warmer layer for evenings on the steppe. UV climbs at altitude, so bring sunscreen and sunglasses.
What time are sunrise and sunset in Ulaanbaatar in May?
Ulaanbaatar May sunrise is 05:10 and sunset is 20:05, with 14h 55min of daylight.
What's the air quality like in Ulaanbaatar in May?
Ulaanbaatar May air quality (AQI) averages 45, rated Good. PM2.5 averages 18μg/m³.
What activities are recommended in Ulaanbaatar in May?
In May, Ulaanbaatar is great for Hustai National Park (wild horses, foaling season), Terelj ger stay + horse trekking, Genghis Khan Statue.
Is May peak season in Ulaanbaatar?
Ulaanbaatar May crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Ulaanbaatar
View Other Months
Planning a May trip to Ulaanbaatar?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.