September weather forecastSaint-Paul, Reunion
September
Weather in September
September signifies warmer days ahead for Saint-Paul. The high temperature rises slightly to 21.5°C (70.7°F), marking the gradual end of the chilled weather. An upswing in sea temperatures to 23.7°C (74.7°F) corresponds to the overall warming trends. As rainfall keeps to the lower end with 15mm (0.59"), the city starts to welcome the outdoor bustle back. With daylight stretching to 12 hours, St. Paul returns to the vibrant tropical atmosphere that it is well known for.Temperature
The transition from August to September sees average high-temperatures adjusting to a still pleasant 21.5°C (70.7°F), from a not significantly different 21.3°C (70.3°F). Saint-Paul nights in September witness a mild cool down to an average temperature of 19.1°C (66.4°F).Humidity
August and September, with an average relative humidity of 76%, are the least humid months in Saint-Paul.Rainfall
The month with the least rainfall is September, when the rain falls for 14.9 days and typically collects 15mm (0.59") of precipitation.Sea temperature
September is the month with the coldest seawater, with an average sea temperature of 23.7°C (74.7°F).Note: Every individual's cold threshold differs, but factors like today's sunshine, wind, and temperature can tip the scales for a delightful swim in 23.7°C (74.7°F) waters. For reference, Olympians swim in waters of 25°C (77°F) to 28°C (82.4°F).
Daylight
In September, the average length of the day in Saint-Paul is 11h and 59min.On the first day of the month, sunrise is at 06:27 and sunset at 18:10. On the last day of September, sunrise is at 06:00 and sunset at 18:17 +04.
Sunshine
The average sunshine in September is 8.8h.UV index
The months with the lowest UV index are June through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Put precautions into practice - Protective measures against sun-induced damage are advised. To guard against the harmful effects of the Sun, minimize exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Watch out! Reflections from sand and water can surge UV radiation exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint-Paul, Reunion
- Average high temperature in September: 21.5°C
The warmest month (with the highest average high temperature) is February (26.2°C).
The months with the lowest average high temperature are July and August (21.3°C).
- Average low temperature in September: 19.1°C
The month with the highest average low temperature is February (23.9°C).
The coldest month (with the lowest average low temperature) is August (18.4°C).
Average pressure in September
Saint-Paul, Reunion
- Average pressure in September: 1020.8mbar
The month with the highest atmospheric pressure is August (1021.3mbar).
The month with the lowest atmospheric pressure is February (1011mbar).
Average wind speed in September
Saint-Paul, Reunion
- Average wind speed in September: 11.1km/h
The windiest month (with the highest average wind speed) is July (13.4km/h).
The calmest month (with the lowest average wind speed) is November (9.4km/h).
Average humidity in September
Saint-Paul, Reunion
- Average humidity in September: 76%
The months with the highest relative humidity are January, February and March (81%).
The months with the lowest relative humidity are August and September (76%).
Average rainfall in September
Saint-Paul, Reunion
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is January (153mm).
The driest month (with the least rainfall) is September (15mm).
Average rainfall days in September
Saint-Paul, Reunion
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is March (26.1 days).
The month with the least rainy days is September (14.9 days).
Average sea temperature in September
Saint-Paul, 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-Paul, 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: 8h and 48min
The month with the most sunshine is October (Average sunshine: 10h and 36min).
The months with the least sunshine are June and July (Average sunshine: 6h and 54min).
Average sunshine days in September
Saint-Paul, Reunion
- Average sunshine days in September: 7 days
The month with the most sunshine days is July (8.8 days).
The month with the least sunshine days is February (1.3 days).
Average UV index in September
Saint-Paul, Reunion
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 6).
The months with the lowest UV index are June, July, August and September (UV index 5).
Average cloud cover in September
Saint-Paul, Reunion
- Average cloud cover in September: 28
The months with the most cloud cover are January, February and March (Cloud cover 38).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in September
Saint-Paul, 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).
