Monthly Climate
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Best time to visit Ulan Bator

July is the best time to visit Ulan Bator for general sightseeing, with average highs of 24 °C and about 11 wet days. The comfortable season runs roughly June to August.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking July comfort 89/100
The least cloud October 39 % average cloud cover
The least rain January 2 mm
Warmth July 24 °C
Cooler weather January -13 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 July 89 24 °C 11
2 June 88 21 °C 10
3 August 88 22 °C 11
4 May 69 16 °C 6
5 September 69 16 °C 8
6 April 45 8.7 °C 5
7 October 41 6.4 °C 4
8 November 39 -3.8 °C 2
9 February 39 -7.6 °C 1
10 March 39 0.8 °C 2
11 December 39 -11 °C 1
12 January 38 -13 °C 1

When to think twice

January scores lowest with about 1 wet days and highs near -13 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January -12.5 °C 2 mm 40 %
February -7.6 °C 3 mm 41 %
March 0.8 °C 7 mm 43 %
April 8.7 °C 17 mm 50 %
May 15.7 °C 35 mm 53 %
June 21.4 °C 56 mm 60 %
July 23.7 °C 69 mm 59 %
August 21.6 °C 69 mm 56 %
September 15.5 °C 39 mm 47 %
October 6.4 °C 15 mm 39 %
November -3.8 °C 6 mm 42 %
December -10.9 °C 2 mm 42 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.