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 snowfall in September
- Average snowfall 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
The beginning of September brings a minor change in the average high-temperature, shifting from a moderately hot 25.1°C (77.2°F) in August to an agreeable 20.3°C (68.5°F). During September, Fort-Louis consistently records a temperature low averaging a cool 10.4°C (50.7°F).Humidity
In September, the average relative humidity is 76%.Rainfall
In September, the rain falls for 11 days. Throughout September, 26mm (1.02") of precipitation is accumulated. In Fort-Louis, during the entire year, the rain falls for 164 days and collects up to 463mm (18.23") of precipitation.Snowfall
In Fort-Louis, snow does not fall in April through September.Daylight
In September, the average length of the day in Fort-Louis, France, is 12h and 35min.On the first day of September in Fort-Louis, France, sunrise is at 06:45 and sunset at 20:09. On the last day of the month, sunrise is at 07:26 and sunset at 19:08 CEST.
Sunshine
In Fort-Louis, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September in Fort-Louis is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September leads to these instructions:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Fort-Louis?
What is the average humidity in September in Fort-Louis?
How much does it rain in Fort-Louis in September?
When it does not snow in Fort-Louis?
Does it snow in Fort-Louis in September?
What is the average length of the day in September in Fort-Louis?
When is the sunrise / sunset in September in Fort-Louis?
How many hours of sunshine does Fort-Louis have in September?
How high is the UV index in September in Fort-Louis?
Average temperature in September
Fort-Louis, France
- Average high temperature in September: 20.3°C
The warmest month (with the highest average high temperature) is August (25.1°C).
The month with the lowest average high temperature is January (4.1°C).
- Average low temperature in September: 10.4°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (-1°C).
Average pressure in September
Fort-Louis, France
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1019.6mbar).
The month with the lowest atmospheric pressure is November (1015.2mbar).
Average wind speed in September
Fort-Louis, France
- Average wind speed in September: 8.3km/h
The windiest month (with the highest average wind speed) is February (11.7km/h).
The calmest month (with the lowest average wind speed) is August (8.1km/h).
Average humidity in September
Fort-Louis, France
- Average humidity in September: 76%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Fort-Louis, France
- Average rainfall in September: 26mm
The wettest months (with the highest rainfall) are May and December (54mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in September
Fort-Louis, France
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is October (10.3 days).
Average snowfall in September
Fort-Louis, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (42mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Fort-Louis, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Fort-Louis, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Fort-Louis, France
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in September
Fort-Louis, France
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Fort-Louis, France
- Average cloud cover in September: 34
The months with the most cloud cover are January and December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Fort-Louis, France
- Average visibility in September: 9km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January, February and December (8km).
