Monthly Climate
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Best time to visit Santarém

August is the best time to visit Santarém for general sightseeing, with average highs of 30 °C and about 12 wet days.

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 August comfort 57/100
The least cloud August 43 % average cloud cover
The least rain September 68 mm
Warmth October 31 °C
Cooler weather April 28 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 August 57 30 °C 12
2 September 57 31 °C 10
3 October 55 31 °C 11
4 February 51 28 °C 26
5 March 51 28 °C 29
6 April 51 28 °C 29
7 May 51 28 °C 30
8 July 51 29 °C 19
9 November 51 31 °C 16
10 January 50 29 °C 27
11 June 50 29 °C 25
12 December 47 30 °C 21

When to think twice

December scores lowest with about 21 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 28.7 °C 413 mm 82 %
February 28.4 °C 400 mm 86 %
March 28.3 °C 499 mm 88 %
April 28.3 °C 463 mm 88 %
May 28.4 °C 375 mm 80 %
June 28.6 °C 191 mm 60 %
July 28.9 °C 121 mm 49 %
August 30.2 °C 73 mm 43 %
September 31.2 °C 68 mm 47 %
October 31.4 °C 107 mm 59 %
November 30.7 °C 156 mm 71 %
December 29.9 °C 233 mm 74 %

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.