Weather in St Denis in August 2025
- August is usually the driest month of the year in St Denis
Average weather
Average temperature in St Denis in August
The temperature in August is +26°C on average, with a range between a maximum of +27°C during the day and a minimum of +17°C at night.
The average maximum temperature goes down 10% by the end of the month, compared with the beginning of the month, from +26°C to +25°C.
Is St Denis warm or cold in August?
St Denis is typically warm in August.
Maximum temperatures go up compared to the previous month from +23°C to +23°C. The minimum temperature also goes up from +19°C to +19°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the coolest months in St Denis, here is the comparison with other months:
Climate in St Denis in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +23°C | +23°C | +24°C | ||||
| Min. temperature | ||||||
| +15°C | +15°C | +15°C | ||||
| Max. temperature | ||||||
| +29°C | +28°C | +29°C | ||||
| Rainfall | ||||||
| 45 mm | 44 mm | 42 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Humidity | ||||||
| 72% | 71% | 71% | ||||
| Air pressure | ||||||
| 1021 HPa | 1021 HPa | 1020 HPa | ||||
| Sunny days | ||||||
| 4 | 4 | 4 | ||||
| Cloudy days | ||||||
| 5 | 7 | 7 | ||||
| Rainy days | ||||||
| 22 | 20 | 19 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +23°C for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 45 mm to 44 mm. It feels drier, as humidity decreases from 72% to 71%. The average wind speed doesn’t change much during August, staying around 4 m/s. The amount of sunny days stay about the same, averaging 4 sunny days during the month.
September brings much the same weather, it remains good.
Wind
The average wind speed is 5 m/s getting up to 10 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in St Denis is gradually increasing during August, going from 6 m/s to 6 m/s over the course of the month.
Rain
How was the weather last August in St Denis?
Climate Change over Years
The climate in St Denis in August has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+24°C) and the highest in 2019 (+28°C). The driest year was 1992 with only 801 mm of rainfall, and the wettest year was 2018 with 2301 mm.
FAQ
Is August a good time to visit St Denis?
Can you sunbathe in St Denis in August?
Is St Denis rainy in August?
Is it sunny in St Denis in August?
Other cities in Réunion
Monthly weather in St Denis
Source of the data
For this page, we’ve looked at the typical weather in St Denis, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
