Climate averages 1991–2020
Saint-Denis weather
in August.
A warm, fairly dry month: the 11th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Saint-Denis: daytime highs average 23.7°C and nights cool to about 19.3°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 34 mm of rain on roughly 10 days, which makes August a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 24 min on an average August day.
The nearest other city in this atlas is Saint-Paul (23 km away). In August its highs average 23.6°C, about as warm as Saint-Denis, with 25 mm of rain.
Among the 3 cities listed in Reunion, Saint-Denis ranks 2nd of 3 for the warmest August highs and 2nd of 3 for the driest August (rainfall, lowest first). The mean August high of those 3 cities is 23.9°C; Saint-Denis is 0.3°C cooler than that mean.
From August to September, average highs rise by 0.6°C to 24.3°C, and monthly rainfall rises from 34 mm to 36 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Saint-Denis climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.1°C24.9°C | 24.9°C | 249 | 21.7 | 13.213 h |
| February | 28.2°C25.1°C | 25.1°C | 245 | 22.1 | 12.813 h |
| March | 28.0°C24.8°C | 24.8°C | 219 | 22.0 | 12.212 h |
| April | 27.3°C23.9°C | 23.9°C | 78 | 16.7 | 11.612 h |
| May | 25.7°C22.2°C | 22.2°C | 74 | 16.0 | 11.111 h |
| June | 24.3°C20.5°C | 20.5°C | 40 | 11.0 | 10.911 h |
| July | 23.5°C19.5°C | 19.5°C | 36 | 11.9 | 11.011 h |
| August, selected | 23.7°C19.3°C | 19.3°C | 34 | 10.0 | 11.411 h |
| September | 24.3°C19.8°C | 19.8°C | 36 | 10.1 | 12.012 h |
| October | 25.3°C21.0°C | 21.0°C | 47 | 11.0 | 12.613 h |
| November | 26.3°C22.3°C | 22.3°C | 84 | 15.4 | 13.113 h |
| December | 27.5°C24.0°C | 24.0°C | 138 | 18.9 | 13.413 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Saint-Paul in AugustReunion · 23 kmHigh 23.6°C · Low 18.7°C · 25 mm rain
- Saint-Pierre in AugustReunion · 51 kmHigh 24.5°C · Low 19.2°C · 45 mm rain
- Vacoas in AugustMauritius · 221 kmHigh 22.3°C · Low 17.5°C · 24 mm rain
- Port Louis in AugustMauritius · 228 kmHigh 24.6°C · Low 20.1°C · 24 mm rain
- Toamasina in AugustMadagascar · 703 kmHigh 22.7°C · Low 18.9°C · 112 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Saint-Denis) is explained once on the Saint-Denis year overview and on the Sources, method and limits page.