Weather by month for Ulaanbaatar, the best months to go and how Mongolia's regions differ, scored from 10 years of climate data.
May, Jun, Aug, Sep
The highest month scores: comfortable temperatures, little rain and plenty of sun.
Highs 16°C to 22°C · 7–12 rain days
Apr, Jul
Still good weather, just not quite the top months.
Highs 10°C to 25°C · 5–13 rain days
Jan, Feb, Mar, Oct, Nov, Dec
No months with tough weather, but these are only average.
Highs -13°C to 7°C · 1–4 rain days
Weather by month
Average highs and lows, rain days, sunshine and our month score out of 10.
| Month | High / low | Rain days | Sunshine | Score |
|---|---|---|---|---|
| January | -13°C / -24°C | 1 day (2 mm) | 8.0 h/day | 5.1/10 |
| February | -8°C / -21°C | 1 day (3 mm) | 9.4 h/day | 5.0/10 |
| March | 2°C / -10°C | 3 days (9 mm) | 10.7 h/day | 4.9/10 |
| April | 10°C / -3°C | 5 days (18 mm) | 11.2 h/day | 6.1/10 |
| Best month: May | 16°C / 3°C | 7 days (27 mm) | 12.0 h/day | 8.1/10 |
| Best month: June | 22°C / 10°C | 10 days (53 mm) | 12.1 h/day | 8.0/10 |
| July | 25°C / 13°C | 13 days (87 mm) | 11.2 h/day | 7.2/10 |
| Best month: August | 22°C / 11°C | 12 days (88 mm) | 11.1 h/day | 7.8/10 |
| Best month: September | 16°C / 4°C | 8 days (41 mm) | 9.8 h/day | 8.0/10 |
| October | 7°C / -4°C | 4 days (13 mm) | 9.0 h/day | 5.2/10 |
| November | -4°C / -14°C | 3 days (10 mm) | 7.8 h/day | 4.8/10 |
| December | -12°C / -22°C | 1 day (3 mm) | 7.4 h/day | 4.9/10 |
Figures for Ulaanbaatar; the country's best months are weighted across its cities. Best months are highlighted. How we score months
Month by month
-13°C / -24°C · 1 rain days · 8.0 h sun
January is the coldest month in Ulaanbaatar, with highs of about -12.6°C and lows near -24.2°C. The cold is tough because it stays below freezing all day. On the plus side, it is very dry, with just 0.8 days of precipitation and about 8 hours of sun a day. The month scores 5.1 out of 10, an ok verdict, and suits travellers who come for real winter.
-8°C / -21°C · 1 rain days · 9.4 h sun
February is still hard winter, with highs around -8.1°C and lows of about -20.9°C. Skies stay mostly clear, with only 1 day of precipitation and around 9.4 hours of sun. The score is 5 out of 10, an ok verdict. Pack for serious cold if you want to see the steppe under winter light.
2°C / -10°C · 3 rain days · 10.7 h sun
March is the first month in Ulaanbaatar with highs above freezing, at about 2.1°C, but nights still drop to around -10.4°C. There are about 2.7 days of precipitation and 10.7 hours of sun. It scores 4.9 out of 10, an ok verdict, as winter is slow to let go.
10°C / -3°C · 5 rain days · 11.2 h sun
April warms up to highs of about 9.5°C, though lows still sit near -2.7°C, so nights are frosty. Expect around 4.7 rain days and 11.2 hours of sun. The score rises to 6.1 out of 10, a good verdict, and the country starts to open up for travel.
16°C / 3°C · 7 rain days · 12.0 h sun
May is one of the best months, with a score of 8.1 out of 10, the highest of the year. Highs reach about 16.4°C and lows stay just above freezing at 2.8°C. Rain is light, with around 6.5 rain days, and you get about 12 hours of sun. Bring layers for cool mornings and evenings.
22°C / 10°C · 10 rain days · 12.1 h sun
June scores 8 out of 10, a best verdict. Days are warm, with highs around 22.3°C and lows of about 9.7°C. Rain picks up to about 10.4 days, but June also has the most sun of the year, at 12.1 hours a day. It is a strong month for long days outdoors.
25°C / 13°C · 13 rain days · 11.2 h sun
July is the warmest month, with highs of about 24.5°C and lows near 13.3°C. It is also the wettest by rain days, at around 13.2, with about 87 mm in total, so plan for showers. The score is 7.2 out of 10, a good verdict, held back mainly by the rain.
22°C / 11°C · 12 rain days · 11.1 h sun
August stays pleasant, with highs around 21.6°C and lows of about 10.7°C. It is the wettest month by volume, at about 88 mm over roughly 12 rain days, so some days will be grey. Still, it scores 7.8 out of 10, a best verdict, with about 11.1 hours of sun.
16°C / 4°C · 8 rain days · 9.8 h sun
September scores 8 out of 10, a best verdict. Highs drop to about 16.2°C and lows to around 4.3°C, so it feels crisp. Rain eases to about 8.3 days and 41 mm. It is a good month for travellers who like cool, clearer weather after the summer showers.
7°C / -4°C · 4 rain days · 9.0 h sun
October turns cold fast, with highs of about 6.6°C and lows near -3.9°C. It is dry, with around 3.9 days of precipitation and 9 hours of sun. The score falls to 5.2 out of 10, an ok verdict, as frosty nights return and winter gets closer.
-4°C / -14°C · 3 rain days · 7.8 h sun
November brings winter back, with highs of about -4.4°C and lows near -14.4°C. The weather is tough because days stay below freezing. Precipitation is light, at about 2.8 days, and sun drops to 7.8 hours. The score is 4.8 out of 10, the lowest of the year, but still an ok verdict.
-12°C / -22°C · 1 rain days · 7.4 h sun
December is deep winter, with highs around -11.9°C and lows near -21.5°C. It is very dry, with just 0.9 days of precipitation, and it has the least sun of the year at 7.4 hours. The month scores 4.9 out of 10, an ok verdict, and suits travellers ready for hard cold.
Regional differences
Average daytime high each month, coloured by that city's own month score.
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ulaanbaatar | -13°C | -8°C | 2°C | 10°C | 16°C | 22°C | 25°C | 22°C | 16°C | 7°C | -4°C | -12°C |
| Mörön | -13°C | -7°C | 3°C | 11°C | 17°C | 23°C | 24°C | 22°C | 16°C | 7°C | -4°C | -11°C |
| Ölgii | -11°C | -6°C | 2°C | 9°C | 16°C | 22°C | 23°C | 21°C | 15°C | 5°C | -4°C | -12°C |
| Tsetserleg | -8°C | -5°C | 3°C | 9°C | 15°C | 21°C | 22°C | 21°C | 16°C | 7°C | -2°C | -7°C |
| Dalanzadgad | -7°C | -2°C | 7°C | 15°C | 21°C | 26°C | 28°C | 27°C | 21°C | 12°C | 2°C | -6°C |
Best Good OK Tough weather
By trip type
City sightseeing
June suits a city trip to Ulaanbaatar best, with highs of 22°C, lows near 10°C and 12.1 sun hours a day. May and September are cooler, with highs of about 16°C. August is warm but wet, with 88 mm of rain over 12 days.
Hiking & nature
May and September suit hiking best. They are the driest of the mild months, with 27 mm and 41 mm of rain and highs around 16°C, but nights drop to about 3–4°C. June and August are warmer but see 10–12 rain days.
Events calendar
Public holidays: New Year's Day (1 Jan)
Public holidays: International Women's Day (8 Mar)
Public holidays: Naadam Holiday (1 Jun)
Public holidays: Naadam Holiday (11 Jul), Naadam Holiday (12 Jul), Naadam Holiday (13 Jul), Naadam Holiday (14 Jul), Naadam Holiday (15 Jul)
Public holidays: Republic Day (26 Nov)
Public holidays: Independence Day (29 Dec)
Keep planning
FAQ
May scores highest, at 8.1 out of 10, with June and September close behind at 8. In Ulaanbaatar, May brings highs of 16.4°C, about 6.5 rain days and 12 hours of sun a day. Nights are still cool, with lows of 2.8°C. June is warmer, with highs of 22.3°C, but it has more rain, with 10.4 rain days. August, at 7.8, also ranks among the best months.
Yes, July is a good month, with a score of 7.2. It is the warmest month in Ulaanbaatar, with highs of 24.5°C and lows of 13.3°C. It is also one of the wettest. Expect about 13.2 rain days and 87 mm of rain. That is why it scores a little lower than May, June, August and September.
Yes, September is one of the best months, with a score of 8 out of 10. Days in Ulaanbaatar reach about 16.2°C, but nights drop to 4.3°C, so pack warm layers. Rain falls on about 8.3 days, which is fewer than in July or August. The city still gets 9.8 hours of sun a day.
January is very cold but dry and sunny, and it scores 5.1 out of 10. In Ulaanbaatar, highs average -12.6°C and lows fall to -24.2°C. There is almost no precipitation: only 2 mm on about 0.8 days. The city still gets about 8 hours of sun a day. This suits travellers who want deep-winter conditions and are well prepared for extreme cold.
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