Annual mean -1°C · wettest around August · prevailing wind W
Warmest
23.7 °C
Coldest
-18.7 °C
Wettest
69%
Windiest
6.5 m/s
Prevailing
W
4.2 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Ulaanbaatar over the whole year is -1°C. July is the hottest month, with highs of about 23°C; January is the coldest, with lows of about -28°C. The rainy (wet) season in Ulaanbaatar runs from May to September, peaking in August with a 45% chance of rain on a given day. The dry season is October to April; January is the driest month, at 2%. Winds in Ulaanbaatar are highest in May, averaging 4.4 m/s (16 km/h), and lightest in January, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Ulaanbaatar come in January, when the sky is typically 29% covered; July is the cloudiest month, at 57%.
Month by month Ulaanbaatar climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-18°C
-28°C
-23°C
2%
29%
1.7 m/s
0
0
0
February
-12°C
-25°C
-18°C
10%
32%
2.1 m/s
0
0
0
March
0°C
-12°C
-7°C
7%
43%
3.0 m/s
0
0
4
April
9°C
-2°C
1°C
11%
51%
4.0 m/s
3
0
24
May
16°C
5°C
9°C
29%
54%
4.4 m/s
23
1
54
June
21°C
12°C
16°C
29%
57%
3.8 m/s
54
9
67
July
23°C
15°C
20°C
29%
57%
3.2 m/s
74
19
61
August
20°C
13°C
17°C
45%
55%
3.0 m/s
65
7
73
September
16°C
5°C
11°C
31%
50%
3.2 m/s
30
1
63
October
6°C
-6°C
0°C
13%
44%
2.9 m/s
0
0
18
November
-7°C
-17°C
-12°C
13%
42%
2.2 m/s
0
0
1
December
-16°C
-26°C
-21°C
5%
32%
1.7 m/s
0
0
0
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Ulaanbaatar weather by season
Year round, Ulaanbaatar has days of about -18°C at their warmest in January, its coolest month, and 23°C in July, its warmest; the coolest hours of the day run from -28°C to 15°C through the year, and the average temperature over the year is -1°C around the clock. Rain is most likely around August and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Ulaanbaatar weather in winterDecember to February
High -16°CLow -26°CRain 6%
Winter in Ulaanbaatar has typical daily highs of about -16°C and lows of about -26°C, with a 6% chance of rain on a given day.
Ulaanbaatar weather in springMarch to May
High 8°CLow -3°CRain 16%
Spring in Ulaanbaatar has typical daily highs of about 8°C and lows of about -3°C, with a 16% chance of rain on a given day.
Ulaanbaatar weather in summerJune to August
High 22°CLow 13°CRain 34%
Summer in Ulaanbaatar has typical daily highs of about 22°C and lows of about 13°C, with a 34% chance of rain on a given day.
Ulaanbaatar weather in autumnSeptember to November
High 5°CLow -6°CRain 19%
Autumn in Ulaanbaatar has typical daily highs of about 5°C and lows of about -6°C, with a 19% chance of rain on a given day.
When is the rainy season in Ulaanbaatar?
The rainy (wet) season in Ulaanbaatar runs from May to September, peaking in August with a 45% chance of rain on a given day. The dry season is October to April; January is the driest month, at 2%.
What time of year is Ulaanbaatar windiest?
Winds in Ulaanbaatar are highest in May, averaging 4.4 m/s (16 km/h), and lightest in January, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Ulaanbaatar year round?
The average temperature in Ulaanbaatar over the whole year is -1°C. July is the hottest month, with highs of about 23°C; January is the coldest, with lows of about -28°C.