Climate of Ulaanbaatar, Mongolia

BSk

Köppen-Geiger climate classification: BSk — Arid, steppe, cold.

Ulaanbaatar has a mean annual temperature of -0.2 °C and receives 261 mm of precipitation per year (1991–2020 climate normals). The warmest month is July with a mean temperature of 18.8 °C, while January is the coldest month at -21.7 °C. Most precipitation falls in July (75 mm); the driest month is January (2 mm).

Climate Diagram

Climate diagram for Ulaanbaatar: monthly mean temperature (red line, left axis, °C) and monthly precipitation (blue bars, right axis, mm), 1991–2020 -20 -40 -10 -20 0 0 10 20 20 40 30 60 40 80 °C mm J F M A M J J A S O N D

Walter–Lieth diagram: blue bars show monthly precipitation (right axis, mm), the red line shows monthly mean temperature (left axis, °C). Scale: 1 °C ≡ 2 mm.

Climate Table

MonthMean temperature (°C)Precipitation (mm)
January-21.71.8
February-16.92.2
March-7.73.4
April2.98.2
May10.218.9
June16.444.6
July18.875.0
August16.264.1
September9.427.8
October0.27.8
November-11.24.8
December-19.22.9
Year-0.2261.4

Live Forecast

Looking for the current weather instead of climate averages? Open the live forecast diagrams in WZ Diagrams — 15 weather models, ensemble spread, radar and more.

Data Source

Climate normals and Köppen-Geiger classification: Beck et al. (2023), Scientific Data 10, 724, CC BY 4.0. Period 1991–2020. Classification resolution ≈ 1 km; monthly climate data resolution ≈ 1 km (0.01°, Original 2023 release; predates the January 2026 correction), sampled at the grid cell containing the city coordinates (47.89°, 106.91°). Climate normals describe the long-term average, not current weather.