Climate averages 1991–2020
Saint-Pierre weather
in September.
A warm, moderately wet month: the 9th warmest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Saint-Pierre: daytime highs average 25.5°C and nights cool to about 19.6°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 45 mm of rain on roughly 12 days, which makes September a moderately wet month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 11 h 57 min on an average September day.
The nearest other city in this atlas is Saint-Paul (42 km away). In September its highs average 24.3°C, 1.2°C cooler than Saint-Pierre, with 26 mm of rain.
Among the 3 cities listed in Reunion, Saint-Pierre ranks 1st of 3 for the warmest September highs and 3rd of 3 for the driest September (rainfall, lowest first). The mean September high of those 3 cities is 24.7°C; Saint-Pierre is 0.8°C warmer than that mean.
From September to October, average highs rise by 1.3°C to 26.8°C, and monthly rainfall rises from 45 mm to 56 mm.
The annual picture
September 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-Pierre climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.7°C25.3°C | 25.3°C | 278 | 23.9 | 13.313 h |
| February | 29.7°C25.5°C | 25.5°C | 266 | 22.9 | 12.813 h |
| March | 29.4°C25.0°C | 25.0°C | 211 | 21.3 | 12.212 h |
| April | 28.5°C23.9°C | 23.9°C | 93 | 18.2 | 11.612 h |
| May | 26.7°C22.1°C | 22.1°C | 86 | 17.1 | 11.111 h |
| June | 25.0°C20.3°C | 20.3°C | 50 | 13.7 | 10.911 h |
| July | 24.2°C19.4°C | 19.4°C | 49 | 14.3 | 11.011 h |
| August | 24.5°C19.2°C | 19.2°C | 45 | 12.6 | 11.411 h |
| September, selected | 25.5°C19.6°C | 19.6°C | 45 | 12.0 | 12.012 h |
| October | 26.8°C20.9°C | 20.9°C | 56 | 13.4 | 12.613 h |
| November | 28.0°C22.4°C | 22.4°C | 96 | 16.4 | 13.113 h |
| December | 29.2°C24.3°C | 24.3°C | 174 | 21.6 | 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
September in nearby cities
- Saint-Paul in SeptemberReunion · 42 kmHigh 24.3°C · Low 19.3°C · 26 mm rain
- Saint-Denis in SeptemberReunion · 51 kmHigh 24.3°C · Low 19.8°C · 36 mm rain
- Vacoas in SeptemberMauritius · 238 kmHigh 23.3°C · Low 17.8°C · 26 mm rain
- Port Louis in SeptemberMauritius · 248 kmHigh 25.4°C · Low 20.4°C · 26 mm rain
- Toamasina in SeptemberMadagascar · 728 kmHigh 23.5°C · Low 19.4°C · 76 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-Pierre) is explained once on the Saint-Pierre year overview and on the Sources, method and limits page.