September weather forecastCascades, Reunion
September
Weather in September
With the approach of September, weather conditions begin to shift once more. While the temperature holds steady, precipitation begins to slightly increase marking the onset of the wet season. Despite this transition, atmospheric pressure remains high and wind conditions moderate. The month offers the deepest visibility of the year, a true treat for those interested in marine exploration. Relative humidity hits its lowest point for the year at 79%.Temperature
The advent of September in Cascades, Reunion, brings an average high-temperature of a still agreeable 21°C (69.8°F), almost identical to the preceding month. Cascades sustains an average of approximately an enjoyable 18.5°C (65.3°F) during September nights, with little variation from daytime highs.Humidity
The months with the lowest humidity in Cascades are August and September, with an average relative humidity of 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 18.5 days and typically collects 26mm (1.02") of precipitation.Daylight
In Cascades, Reunion, the average length of the day in September is 11h and 59min.On the first day of September in Cascades, sunrise is at 06:25 and sunset at 18:07. On the last day of the month, sunrise is at 05:58 and sunset at 18:14 +04.
Sunshine
The average sunshine in September in Cascades is 8.9h.UV index
The months with the lowest UV index in Cascades, Reunion, are June through October, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 5 suggests this advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cascades, Reunion
- Average high temperature in September: 21°C
The warmest month (with the highest average high temperature) is January (25.7°C).
The month with the lowest average high temperature is August (20.4°C).
- Average low temperature in September: 18.5°C
The month with the highest average low temperature is February (23.6°C).
The coldest month (with the lowest average low temperature) is August (18.2°C).
Average pressure in September
Cascades, Reunion
- Average pressure in September: 1020.7mbar
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
Cascades, Reunion
- Average wind speed in September: 15.7km/h
The windiest month (with the highest average wind speed) is July (18km/h).
The calmest months (with the lowest average wind speed) are November and December (12.4km/h).
Average humidity in September
Cascades, Reunion
- Average humidity in September: 79%
The months with the highest relative humidity are February and March (84%).
The months with the lowest relative humidity are August and September (79%).
Average rainfall in September
Cascades, Reunion
- Average rainfall in September: 26mm
The wettest month (with the highest rainfall) is January (199mm).
The driest month (with the least rainfall) is September (26mm).
Average rainfall days in September
Cascades, Reunion
- Average rainfall days in September: 18.5 days
The month with the highest number of rainy days is March (27.7 days).
The month with the least rainy days is September (18.5 days).
Average daylight in September /
Average sunshine in September
Cascades, 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 54min
The month with the most sunshine is October (Average sunshine: 10h and 12min).
The month with the least sunshine is June (Average sunshine: 6h and 18min).
Average sunshine days in September
Cascades, Reunion
- Average sunshine days in September: 4.3 days
The month with the most sunshine days is October (5.5 days).
The month with the least sunshine days is February (0.3 days).
Average UV index in September
Cascades, Reunion
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, May, November and December (UV index 6).
The months with the lowest UV index are June, July, August, September and October (UV index 5).
Average cloud cover in September
Cascades, Reunion
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in September
Cascades, Reunion
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
