Monthly Climate
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Best time to visit Ya'an

April is the best time to visit Ya'an for general sightseeing, with average highs of 20 °C and about 14 wet days. The comfortable season runs roughly April to May.

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 April comfort 80/100
The least cloud December 76 % average cloud cover
The least rain December 44 mm
Warmth July 28 °C
Cooler weather January 8.2 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 April 80 20 °C 14
2 May 79 24 °C 16
3 September 71 23 °C 20
4 October 70 19 °C 20
5 June 69 26 °C 17
6 November 61 15 °C 15
7 March 61 15 °C 15
8 August 58 27 °C 22
9 July 57 28 °C 22
10 February 45 11 °C 13
11 December 44 9.7 °C 12
12 January 36 8.2 °C 13

When to think twice

January scores lowest with about 13 wet days and highs near 8.2 °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 8.2 °C 46 mm 78 %
February 10.8 °C 53 mm 80 %
March 15.1 °C 80 mm 80 %
April 20.2 °C 109 mm 79 %
May 23.5 °C 137 mm 80 %
June 26.1 °C 185 mm 83 %
July 27.8 °C 303 mm 80 %
August 27.4 °C 354 mm 78 %
September 23.5 °C 205 mm 84 %
October 18.8 °C 122 mm 86 %
November 14.6 °C 76 mm 82 %
December 9.7 °C 44 mm 76 %

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.