Réunion
Réunion in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Réunion in September is climatically well suited to city breaks, active holidays and hiking, beach holidays and family holidays. The average daily high is around 21 °C, and the sea is about 24 °C. With about 11 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
79/100 · #3
Warmth
#9
Dryness
#1
Sun
#6
Sea warmth
#11
Published best categories: Overall, City break, Active
Réunion · SeptemberPhoto: Bascobug · CC BY-SA 4.0Climate facts
- Average high
- 21 °C
- Average low
- 17 °C
- Sea
- 24 °C
- Rainy days (est.)
- 11 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 76 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 20 | 17 | 12 | 39 | 6.2 | 78 | 4.9 | 24 | 73 |
| September (selected) | 21 | 17 | 11 | 36 | 7.5 | 76 | 4.7 | 24 | 79 |
| October | 23 | 18 | 11 | 37 | 8.5 | 76 | 4.5 | 24 | 82 |
How do the previous and next months compare?
Baseline: September (79/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | -6 | -0.9 °C | -0.4 °C | +1.4 | +3.4 mm | -1.3 h | +1.1 % | +0.2 m/s | -0.1 °C |
| October | +3 | +1.6 °C | +1.1 °C | +0.1 | +1.2 mm | +1 h | -0.5 % | -0.3 m/s | +0.7 °C |
All twelve months in context
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Where to stay in Réunion
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Useful next decisions
Frequently asked questions
How warm is Réunion in September?
The average daily high is around 21 °C, with an average daily low of about 17 °C.
Can you swim in Réunion in September?
The sea is about 24 °C (swimmable).
Does it rain a lot in Réunion in September?
The curated estimate is about 11 rainy days per month, not a directly measured long-term average. Total precipitation averages around 36 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Réunion?
By the climate score, September, October, November and December are the strongest months for Réunion. For a beach trip: January, October, November and December. September is one of them.