Ulaanbaatar revel-in extreme continental weather. Summer months require shorts or light pants and short-sleeve shirt. Summer evenings may be cooler. Light pants and long-sleeve shirt or light sweater are suitable for Spring.
Winters are extreme cold where temperatures can drop below -40 c. Dress to stay warm – you'll need thick warm clothes & Waterproof boots.
Ulaanbaatar weather; Extreme continental Between -40°C to +40°C