Weatheo

Rio Grande Weather by Month

Average temperatures, rainfall and humidity for Rio Grande, Brazil, month by month, built from OpenWeather’s historical records. Use it to see what a typical Rio Grande month looks like before you travel — then check the live Rio Grande forecast for the days ahead.

Warmest month

February

29°C average high

Coolest month

July

10°C average low

Wettest month

September

115 mm of rain

Driest month

December

53 mm of rain

Average temperature and rainfall in Rio Grande by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January29°C21°C11°C / 41°C
65 mm
76%18 km/h
February29°C20°C10°C / 40°C
53 mm
77%17 km/h
March27°C19°C6°C / 38°C
58 mm
78%17 km/h
April25°C17°C6°C / 36°C
54 mm
78%17 km/h
May20°C13°C1°C / 33°C
73 mm
82%16 km/h
June18°C11°C0°C / 31°C
83 mm
84%15 km/h
July17°C10°C-2°C / 31°C
69 mm
86%15 km/h
August19°C11°C-1°C / 34°C
80 mm
84%17 km/h
September20°C13°C1°C / 35°C
115 mm
84%18 km/h
October22°C15°C4°C / 37°C
62 mm
81%19 km/h
November25°C17°C4°C / 38°C
54 mm
76%19 km/h
December27°C19°C10°C / 38°C
53 mm
75%19 km/h

Best time to visit Rio Grande

The most comfortable time to visit Rio Grande is generally April and October to November, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around September, totalling about 820 mm a year.

Travellers who prefer heat should aim for February, when highs average 29°C. September is the month to avoid if rain would spoil your plans — it averages 115 mm, roughly 2× the rainfall of the driest month (December).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Rio Grande forecast for what is happening now.

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