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 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
September
Weather in September
Temperature
As Cilaos transitions from August to September, the average high-temperatures adjust to a still pleasant 21.4°C (70.5°F), nearly the same as the previous 20.9°C (69.6°F). Throughout September nights, Cilaos records a consistent low-temperature averaging an enjoyable 18.6°C (65.5°F).Humidity
August and September, with an average relative humidity of 78%, are the least humid months.Rainfall
September is the month with the least rainfall. Rain falls for 15.6 days and accumulates 19mm (0.75") of precipitation.Daylight
The average length of the day in September is 11h and 59min.On the first day of the month, sunrise is at 06:26 and sunset at 18:09. On the last day of September, in Cilaos, sunrise is at 05:59 and sunset at 18:16 +04.
Sunshine
The average sunshine in September is 9.1h.UV index
The months with the lowest UV index in Cilaos are April, June through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Be vigilant - A duty to shield skin and eyes from injury exists. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Cilaos?
What are the least humid months in Cilaos?
What is the average humidity in September in Cilaos?
What is the driest month in Cilaos?
How many days does it rain in September in Cilaos?
How many hours of daylight does Cilaos have in September?
When are sunrise and sunset in September in Cilaos?
How many hours of sunshine does Cilaos have in September?
When is the lowest UV index in Cilaos?
What is the UV index reading in September in Cilaos?
Average temperature in September
Cilaos, Reunion
- Average high temperature in September: 21.4°C
The warmest month (with the highest average high temperature) is February (25.9°C).
The month with the lowest average high temperature is July (20.7°C).
- Average low temperature in September: 18.6°C
The months with the highest average low temperature are January, February and March (23.3°C).
The coldest month (with the lowest average low temperature) is August (17.8°C).
Average pressure in September
Cilaos, Reunion
- Average pressure in September: 1020.9mbar
The month with the highest atmospheric pressure is August (1021.4mbar).
The month with the lowest atmospheric pressure is February (1011.1mbar).
Average wind speed in September
Cilaos, Reunion
- Average wind speed in September: 17.1km/h
The windiest month (with the highest average wind speed) is July (18.2km/h).
The calmest months (with the lowest average wind speed) are November and December (12.5km/h).
Average humidity in September
Cilaos, Reunion
- Average humidity in September: 78%
The month with the highest relative humidity is March (83%).
The months with the lowest relative humidity are August and September (78%).
Average rainfall in September
Cilaos, Reunion
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is January (193mm).
The driest month (with the least rainfall) is September (19mm).
Average rainfall days in September
Cilaos, Reunion
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is March (26.2 days).
The month with the least rainy days is September (15.6 days).
Average daylight in September /
Average sunshine in September
Cilaos, 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 1min
The month with the most sunshine is October (Average sunshine: 10h and 30min).
The months with the least sunshine are May, June and July (Average sunshine: 6h and 42min).
Average sunshine days in September
Cilaos, Reunion
- Average sunshine days in September: 4.3 days
The month with the most sunshine days is October (6.6 days).
The month with the least sunshine days is February (1.1 days).
Average UV index in September
Cilaos, Reunion
- Average UV index in September: 5
The months with the highest UV index are January, February, March, May, October, November and December (UV index 6).
The months with the lowest UV index are April, June, July, August and September (UV index 5).
Average cloud cover in September
Cilaos, Reunion
- Average cloud cover in September: 24
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 24).
Average visibility in September
Cilaos, 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).
