Climate averages 1991–2020
Saint-Denis weather
in May.
A warm, moderately wet month: the 7th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Saint-Denis: daytime highs average 25.7°C and nights cool to about 22.2°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 74 mm of rain on roughly 16 days, which makes May a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 08 min on an average May day.
The nearest other city in this atlas is Saint-Paul (23 km away). In May its highs average 25.6°C, about as warm as Saint-Denis, with 42 mm of rain.
Among the 3 cities listed in Reunion, Saint-Denis ranks 2nd of 3 for the warmest May highs and 2nd of 3 for the driest May (rainfall, lowest first). The mean May high of those 3 cities is 26.0°C; Saint-Denis is 0.3°C cooler than that mean.
From May to June, average highs fall by 1.4°C to 24.3°C, and monthly rainfall falls from 74 mm to 40 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Saint-Paul in MayReunion · 23 kmHigh 25.6°C · Low 21.7°C · 42 mm rain
- Saint-Pierre in MayReunion · 51 kmHigh 26.7°C · Low 22.1°C · 86 mm rain
- Vacoas in MayMauritius · 221 kmHigh 24.8°C · Low 20.3°C · 43 mm rain
- Port Louis in MayMauritius · 228 kmHigh 26.9°C · Low 22.8°C · 43 mm rain
- Toamasina in MayMadagascar · 703 kmHigh 25.0°C · Low 21.6°C · 201 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.