Monthly climate guide

Saint-Denis weather in August

Expect warm weather in Saint-Denis in August: afternoons reach about 21°C (70°F), while nights drop to around 17°C (63°F). Around 27 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are about the same as July and about the same as September.

What stands out in August

It's one of the drier stretches of the year in Saint-Denis.
Just 50 km apart, but Saint-Denis runs about 2°C cooler than Saint-Pierre this month.
Only one month is cooler in Saint-Denis than August.
There's little difference between day and night (around 4°C).

Avg high

21°C

70°F

Avg low

17°C

63°F

Rainfall

27 mm

fairly dry

Humidity

77%

relative

Sky

46%

cloud · a mix of sun and cloud

Live Saint-Denis forecast Where else to go in August

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Saint-Denis weather by month

Low → high °C Rain (mm)

Show the monthly averages as a table

Average monthly climate in Saint-Denis
Month	Avg high	Avg low	Rain	Humidity	Cloud cover
January	27°C / 80°F	23°C / 73°F	150 mm	79%	58%
February	27°C / 80°F	23°C / 73°F	109 mm	80%	58%
March	26°C / 79°F	23°C / 73°F	144 mm	81%	55%
April	25°C / 77°F	22°C / 71°F	77 mm	81%	50%
May	24°C / 74°F	20°C / 68°F	39 mm	78%	46%
June	22°C / 71°F	19°C / 65°F	36 mm	79%	48%
July	21°C / 70°F	18°C / 64°F	26 mm	77%	47%
August	21°C / 70°F	17°C / 63°F	27 mm	77%	46%
September	22°C / 72°F	18°C / 64°F	21 mm	75%	42%
October	24°C / 75°F	19°C / 66°F	30 mm	75%	43%
November	26°C / 78°F	20°C / 69°F	44 mm	74%	45%
December	27°C / 80°F	22°C / 72°F	47 mm	74%	47%

What to pack for August

T-shirts plus a light layer for the evening
Comfortable trainers or sandals for long walks

Full season-by-season packing guide →

Is August a good time to visit Saint-Denis?

Compare the months in the chart above to find your ideal window.

Best time to visit Saint-Denis →

Other Réunion cities in August

Saint-Pierre

23° / 21°C · 19 mm

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Saint-Denis weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/reunion/saint-denis/august

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Saint-Denis in August: quick answers

Is August a good time to visit Saint-Denis?

Yes. August is one of the best months for Saint-Denis, with highs around 21°C and about 27 mm of rain.

How warm is Saint-Denis in August?

Average highs are about 21°C (70°F) and average lows about 17°C (63°F), based on 10 years of daily data.

Does it rain a lot in Saint-Denis in August?

Saint-Denis typically gets around 27 mm of rain in August — fairly dry.

Figures are long-term averages for the area around Saint-Denis (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.