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
In Firmi, entering September brings a subtle temperature decrement, reducing from August's warm 26.6°C (79.9°F) to a pleasant 22.1°C (71.8°F). Firmi's nights during September are marked by a pronounced drop from daytime temperatures, experiencing an average low of 9.8°C (49.6°F).Humidity
The average relative humidity in September in Firmi is 73%.Rainfall
September is the month with the least rainfall. Rain falls for 8.5 days and accumulates 28mm (1.1") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Firmi, France, the average length of the day in September is 12h and 31min.On the first day of September in Firmi, sunrise is at 07:14 and sunset at 20:27. On the last day of the month, sunrise is at 07:48 and sunset at 19:33 CEST.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Firmi, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 4 during September translates into the following guidance:
Adopt protective measures - It is advised to guard against sun damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Firmi?
What is the average humidity in September in Firmi?
What is the driest month in Firmi?
How many days does it rain in September in Firmi?
When it does not snow in Firmi?
Does it snow in Firmi in September?
How many hours of daylight does Firmi have in September?
When are sunrise and sunset in September in Firmi?
How many hours of sunshine does Firmi have in September?
What is the UV index intensity in September in Firmi?
Average temperature in September
Firmi, France
- Average high temperature in September: 22.1°C
The warmest month (with the highest average high temperature) is August (26.6°C).
The month with the lowest average high temperature is January (6.6°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is July (13°C).
The coldest month (with the lowest average low temperature) is February (-1°C).
Average pressure in September
Firmi, France
- Average pressure in September: 1018.3mbar
The month with the highest atmospheric pressure is December (1021.5mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed in September
Firmi, France
- Average wind speed in September: 7.3km/h
The windiest month (with the highest average wind speed) is March (10km/h).
The calmest months (with the lowest average wind speed) are August and September (7.3km/h).
Average humidity in September
Firmi, France
- Average humidity in September: 73%
The months with the highest relative humidity are November and December (87%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Firmi, France
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is November (63mm).
The driest month (with the least rainfall) is September (28mm).
Average rainfall days in September
Firmi, France
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is September (8.5 days).
Average snowfall in September
Firmi, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (91mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Firmi, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Firmi, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is November (Average sunshine: 4h and 30min).
Average sunshine days in September
Firmi, France
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is September (20.1 days).
The months with the least sunshine days are April and June (14.5 days).
Average UV index in September
Firmi, France
- Average UV index in September: 4
The months with the highest UV index are 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
Firmi, France
- Average cloud cover in September: 33
The month with the most cloud cover is November (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Firmi, France
- Average visibility in September: 8km
The month with the highest visibility is August (9km).
The months with the lowest visibility are January, February, November and December (7km).
