September weather forecastSaint-Pierre, Reunion
September
Weather in September
September marks the end of the dry spell in Saint-Pierre, with a subtle increase in average rainfall from 11mm (0.43") in August to 10mm (0.39"). This minor upward shift is also reflected in high and low temperatures which rise marginally, hinting at the onset of warmer months. Interestingly, the wind speeds drop to 18.2km/h (11.3mph), a slight reduction from the preceding month, providing a soothing respite from the increasing temperatures. Despite these changes, September is still characterized by favorable weather, striking a balance between the approaching warm conditions and the receding dry spell.Temperature
The shift to September in Saint-Pierre signals an average high-temperature of a still agreeable 21.7°C (71.1°F), subtly varied from August's 21.5°C (70.7°F). September in Saint-Pierre sees a slight dip to an average low temperature of 19.5°C (67.1°F) from the daytime highs.Humidity
The months with the lowest humidity in Saint-Pierre are July through September, with an average relative humidity of 77%.Rainfall
September is the month with the least rainfall in Saint-Pierre. Rain falls for 9.5 days and accumulates 10mm (0.39") of precipitation.Sea temperature
With an average sea temperature of 23.7°C (74.7°F), September is the month with the coldest seawater in Saint-Pierre.Note: For those not fond of cold temperatures, taking a swim at 23.7°C (74.7°F) may require consideration of the sunshine, wind, and ambient temperature. While wetsuits are not mandatory, they can enhance the experience.
Daylight
In September, the average length of the day in Saint-Pierre is 11h and 59min.On the first day of September, sunrise is at 06:26 and sunset at 18:09. On the last day of the month, sunrise is at 05:59 and sunset at 18:16 +04.
Sunshine
In September, the average sunshine is 9.3h.UV index
January, March through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint-Pierre, Reunion
- Average high temperature in September: 21.7°C
The warmest months (with the highest average high temperature) are January, February and March (26.3°C).
The month with the lowest average high temperature is July (21.3°C).
- Average low temperature in September: 19.5°C
The months with the highest average low temperature are January and February (24.3°C).
The coldest month (with the lowest average low temperature) is July (18.8°C).
Average pressure in September
Saint-Pierre, Reunion
- Average pressure in September: 1020.9mbar
The month with the highest atmospheric pressure is August (1021.5mbar).
The month with the lowest atmospheric pressure is February (1011.1mbar).
Average wind speed in September
Saint-Pierre, Reunion
- Average wind speed in September: 18.2km/h
The windiest month (with the highest average wind speed) is July (19.8km/h).
The calmest month (with the lowest average wind speed) is November (13.4km/h).
Average humidity in September
Saint-Pierre, Reunion
- Average humidity in September: 77%
The months with the highest relative humidity are January, February, March and April (81%).
The months with the lowest relative humidity are July, August and September (77%).
Average rainfall in September
Saint-Pierre, Reunion
- Average rainfall in September: 10mm
The wettest month (with the highest rainfall) is January (162mm).
The driest month (with the least rainfall) is September (10mm).
Average rainfall days in September
Saint-Pierre, Reunion
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is March (24.9 days).
The month with the least rainy days is September (9.5 days).
Average sea temperature in September
Saint-Pierre, Reunion
- Average sea temperature in September: 23.7°C
The best month for swimming (with the highest average sea temperature) is March (28.4°C).
The coldest month (with the lowest average sea temperature) is September (23.7°C).
Average daylight in September /
Average sunshine in September
Saint-Pierre, Reunion
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is October (Average sunshine: 10h and 54min).
The month with the least sunshine is May (Average sunshine: 6h and 54min).
Average sunshine days in September
Saint-Pierre, Reunion
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is August (13.5 days).
The month with the least sunshine days is February (1.7 days).
Average UV index in September
Saint-Pierre, Reunion
- Average UV index in September: 6
The month with the highest UV index is February (UV index 7).
The months with the lowest UV index are January, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
Saint-Pierre, Reunion
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 21).
Average visibility in September
Saint-Pierre, Reunion
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
