September
OK
24.8°C / 19.8°C
18 rain days
warm, very wet
- comfortable temperatures (avg high 24.8°C / 77°F)
- warm evenings without humidity overload
Best time to visit Saint-Denis (Réunion)
Saint-Denis (Réunion), Réunion — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. Every month has trade-offs — pick what you can tolerate.
Best · September
About Saint-Denis (Réunion)
Saint-Denis, unofficially Saint-Denis de La Réunion for disambiguation, is the prefecture of the French overseas department and region of Réunion, in the Indian Ocean. It is located at the island's northernmost point, close to the mouth of the Rivière Saint-Denis.
— condensed from Wikipedia ("Saint-Denis, Réunion")
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Going to Saint-Denis (Réunion) in September?
See exactly what to pack for September's weather — a climate-based list, not generic advice.
September packing list →
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OK — shoulder months
Months to skip
July
Skip
23.8°C / 19.1°C
19 rain days
warm, very wet
- extremely wet (19 rain days)
June
Skip
24.2°C / 20.1°C
20 rain days
warm, very wet
- extremely wet (20 rain days)
August
Skip
23.9°C / 19.3°C
20 rain days
warm, very wet
- extremely wet (20 rain days)
October
Skip
25.9°C / 21.2°C
21 rain days
warm, very wet
- extremely wet (21 rain days)
May
Skip
25.8°C / 21.8°C
23 rain days
warm, very wet
- extremely wet (23 rain days)
November
Skip
26.9°C / 22.5°C
24 rain days
warm, very wet
- extremely wet (24 rain days)
April
Skip
27.6°C / 23.9°C
25 rain days
warm, very wet
- extremely wet (25 rain days)
December
Skip
28.1°C / 24.1°C
25 rain days
hot, very wet
- extremely wet (25 rain days)
February
Skip
28.2°C / 24.9°C
26 rain days
hot, very wet
- extremely wet (26 rain days)
March
Skip
28.3°C / 24.8°C
28 rain days
hot, very wet
- extremely wet (28 rain days)
January
Skip
28.4°C / 24.9°C
28 rain days
hot, very wet
- extremely wet (28 rain days)
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.