Monthly Climate
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Best time to visit São Luís

November is the best time to visit São Luís for general sightseeing, with average highs of 31 °C and about 5 wet days. The comfortable season runs roughly July to December.

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 November comfort 62/100
A beach holiday September sea 28 °C
The least cloud August 33 % average cloud cover
The least rain September 13 mm
Warmth October 31 °C
Cooler weather March 28 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 November 62 31 °C 5 88
2 September 62 31 °C 3 91
3 August 61 31 °C 8 83
4 October 61 31 °C 3 91
5 December 54 31 °C 12 74
6 July 53 29 °C 17 70
7 March 51 28 °C 30 71
8 April 50 28 °C 29 70
9 February 50 28 °C 26 71
10 May 49 29 °C 27 69
11 June 49 29 °C 21 69
12 January 48 29 °C 24 71

For a beach holiday

September scores highest, with a sea temperature of 28 °C and air temperatures around 31 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 28 °C 29 °C 77 % 71
February 28 °C 28 °C 82 % 71
March 28 °C 28 °C 86 % 71
April 29 °C 28 °C 85 % 70
May 29 °C 29 °C 70 % 69
June 29 °C 29 °C 50 % 69
July 28 °C 29 °C 41 % 70
August 28 °C 31 °C 33 % 83
September 28 °C 31 °C 34 % 91
October 28 °C 31 °C 42 % 91
November 28 °C 31 °C 55 % 88
December 28 °C 31 °C 63 % 74

When to think twice

January scores lowest with about 24 wet days and highs near 29 °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 29.1 °C 194 mm 77 %
February 28.4 °C 265 mm 82 %
March 28.2 °C 398 mm 86 %
April 28.4 °C 375 mm 85 %
May 28.9 °C 271 mm 70 %
June 29.2 °C 130 mm 50 %
July 29.4 °C 85 mm 41 %
August 30.6 °C 27 mm 33 %
September 31.2 °C 13 mm 34 %
October 31.2 °C 14 mm 42 %
November 31.0 °C 28 mm 55 %
December 30.5 °C 61 mm 63 %

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.