Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
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.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Saint-Pierre?
What is the least humid month in Saint-Pierre?
What is the average humidity in September in Saint-Pierre?
What is the driest month in Saint-Pierre?
How many days does it rain in September in Saint-Pierre?
When is the sea coldest in Saint-Pierre?
What is the water temperature in September in Saint-Pierre?
How many hours of daylight does Saint-Pierre have in September?
What time are sunrise and sunset in September in Saint-Pierre?
How long on average sun shines in September in Saint-Pierre?
What is the month with the lowest UV index in Saint-Pierre?
How high is the UV index in September in Saint-Pierre?
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 2min
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).
Saint-Pierre, Reunion
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