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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Current Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
The live forecast above shows today’s conditions for Ulaanbaatar, the world’s coldest capital city. Expect a sharp chill even in summer, and prepare for extreme cold from October through April, with December often the harshest month.
What makes Ulaanbaatar’s climate so extreme?
Ulaanbaatar sits at 1,350 metres elevation in a valley, trapping cold air and creating a subarctic climate with long, freezing winters and short, mild summers. The ulaanbaatar weather year round swings from average highs near 22°C in July to lows around –36°C in January. This vast range means you need lightweight layers in summer and heavy insulation in winter.
When should I visit for milder conditions?
Summer (June to August) is the most comfortable window, with daytime highs in the high teens to low 20s Celsius. If you’re checking ulaanbaatar weather by month, July is the warmest; December and January are the coldest and driest. For longer planning, ulaanbaatar weather 14 days forecasts are reliable within a week, while ulaanbaatar weather 30 days outlooks show broad trends only. For a quick check, look up weather ulaanbaatar 10 days before you travel.
How cold does Ulaanbaatar get in December?
December is the start of deep winter, with average highs around –15°C and lows near –30°C. ulaanbaatar weather december is consistently dry and icy, so pack thermal layers, a windproof jacket and good boots.
What does ulaanbaatar weather celsius mean for travellers?
All forecasts are in Celsius. Summer highs of 20–22°C feel pleasant but evenings drop quickly. Winter readings below –30°C are common; exposed skin can freeze in minutes. Always check current values in the live forecast above.
Is Ulaanbaatar colder than other Australian cities?
Yes, far colder. Australian winter temperatures in Melbourne or Sydney rarely drop below 0°C, while Ulaanbaatar’s winter averages are below –15°C. For Australian readers, think of a severe weather warning for cold – that’s Ulaanbaatar’s norm.