Monthly Climate
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Best time to visit San Luis

April is the best time to visit San Luis for general sightseeing, with average highs of 22 °C and about 7 wet days. The comfortable season runs roughly March 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 94/100
The least cloud August 33 % average cloud cover
The least rain June 9 mm
Warmth January 30 °C
Cooler weather July 16 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 April 94 22 °C 7
2 September 94 22 °C 4
3 October 90 24 °C 8
4 May 89 19 °C 4
5 August 88 19 °C 2
6 March 85 26 °C 10
7 November 80 27 °C 12
8 June 80 16 °C 2
9 July 77 16 °C 2
10 February 76 28 °C 11
11 December 72 29 °C 12
12 January 68 30 °C 13

When to think twice

January scores lowest with about 13 wet days and highs near 30 °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 29.8 °C 103 mm 39 %
February 28.4 °C 84 mm 37 %
March 26.1 °C 83 mm 38 %
April 21.9 °C 53 mm 40 %
May 18.6 °C 25 mm 48 %
June 16.4 °C 9 mm 40 %
July 16.0 °C 9 mm 36 %
August 19.1 °C 15 mm 33 %
September 21.5 °C 30 mm 36 %
October 24.1 °C 66 mm 39 %
November 26.7 °C 92 mm 37 %
December 29.0 °C 99 mm 37 %

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.