Monthly Climate
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Best time to visit Rio Grande

November is the best time to visit Rio Grande for general sightseeing, with average highs of 21 °C and about 8 wet days. The comfortable season runs roughly October to January. The sea stays above 20 °C from December to April.

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 83/100
A beach holiday January sea 24 °C
The least cloud March 51 % average cloud cover
The least rain November 92 mm
Warmth February 25 °C
Cooler weather July 15 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 November 83 21 °C 8 60
2 April 81 22 °C 10 66
3 December 81 23 °C 8 77
4 May 80 19 °C 9 46
5 October 78 19 °C 10 41
6 March 76 24 °C 11 78
7 January 74 25 °C 10 81
8 February 73 25 °C 11 81
9 June 73 16 °C 10 26
10 September 72 17 °C 10 24
11 August 70 16 °C 10 19
12 July 67 15 °C 10 15

For a beach holiday

January scores highest, with a sea temperature of 24 °C and air temperatures around 25 °C. The sea is above 20 °C from December to April.

Month Sea Air Sunshine Beach score
January 24 °C 25 °C 53 % 81
February 24 °C 25 °C 53 % 81
March 24 °C 24 °C 51 % 78
April 22 °C 22 °C 53 % 66
May 19 °C 19 °C 58 % 46
June 16 °C 16 °C 59 % 26
July 14 °C 15 °C 58 % 15
August 14 °C 16 °C 56 % 19
September 15 °C 17 °C 60 % 24
October 18 °C 19 °C 62 % 41
November 20 °C 21 °C 53 % 60
December 22 °C 23 °C 51 % 77

When to think twice

July scores lowest with about 10 wet days and highs near 15 °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 24.9 °C 98 mm 53 %
February 25.1 °C 94 mm 53 %
March 24.2 °C 104 mm 51 %
April 21.9 °C 121 mm 53 %
May 18.7 °C 104 mm 58 %
June 16.3 °C 114 mm 59 %
July 15.2 °C 116 mm 58 %
August 16.1 °C 110 mm 56 %
September 17.0 °C 133 mm 60 %
October 19.2 °C 137 mm 62 %
November 21.3 °C 92 mm 53 %
December 23.5 °C 96 mm 51 %

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.