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 sea temperature 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
Weather in September
Temperature
The onset of September marks an average high-temperature of a still moderately hot 24.1°C (75.4°F), hardly differing from August's 27°C (80.6°F). Nighttime temperature sees a small decrement from daytime highs, dipping to an average of 19.7°C (67.5°F) during September.Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 69%.Rainfall
In Follonica, during September, the rain falls for 10.8 days and regularly aggregates up to 55mm (2.17") of precipitation. Throughout the year, there are 126.9 rainfall days, and 534mm (21.02") of precipitation is accumulated.Snowfall
January, April through December are months without snowfall in Follonica.Sea temperature
In Follonica, Italy, the average seawater temperature in September is 23.5°C (74.3°F).Note: If you're wary of the cold, the surrounding conditions—sunshine, wind, and air temperature become crucial when swimming in 23.5°C (74.3°F) waters. Olympic standards, for reference, are set between 25°C (77°F) and 28°C (82.4°F).
Daylight
In Follonica, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 06:42 and sunset at 19:51. On the last day of September, in Follonica, sunrise is at 07:13 and sunset at 18:59 CEST.
Sunshine
In Follonica, the average sunshine in September is 10.6h.UV index
The average daily maximum UV index in September in Follonica, Italy, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Watch out! Reflections from sand and water can surge UV radiation exposure.
Frequently asked questions
What are September temperatures in Follonica?
What are the least humid months in Follonica?
What is the average humidity in September in Follonica?
How much does it rain in Follonica in September?
When it does not snow in Follonica?
What is the water temperature in September in Follonica?
How many hours of daylight does Follonica have in September?
When is the sunrise / sunset in September in Follonica?
How many hours of sunshine does Follonica have in September?
How high is the UV index in September in Follonica?
Average temperature in September
Follonica, Italy
- Average high temperature in September: 24.1°C
The warmest month (with the highest average high temperature) is August (27°C).
The month with the lowest average high temperature is January (11.3°C).
- Average low temperature in September: 19.7°C
The month with the highest average low temperature is August (22.8°C).
The coldest month (with the lowest average low temperature) is February (8.3°C).
Average pressure in September
Follonica, Italy
- Average pressure in September: 1015.4mbar
The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is July (1013.7mbar).
Average wind speed in September
Follonica, Italy
- Average wind speed in September: 13.8km/h
The windiest month (with the highest average wind speed) is February (19.7km/h).
The calmest month (with the lowest average wind speed) is July (12.1km/h).
Average humidity in September
Follonica, Italy
- Average humidity in September: 69%
The month with the highest relative humidity is November (75%).
The months with the lowest relative humidity are August and September (69%).
Average rainfall in September
Follonica, Italy
- Average rainfall in September: 55mm
The wettest month (with the highest rainfall) is November (108mm).
The driest month (with the least rainfall) is August (19mm).
Average rainfall days in September
Follonica, Italy
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is November (15.5 days).
The month with the least rainy days is August (5.5 days).
Average snowfall in September
Follonica, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is March (4mm).
The months with the least snowfall are January, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Follonica, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Follonica, Italy
- Average sea temperature in September: 23.5°C
The best month for swimming (with the highest average sea temperature) is August (24.8°C).
The coldest month (with the lowest average sea temperature) is February (13.7°C).
Average daylight in September /
Average sunshine in September
Follonica, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Follonica, Italy
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is August (24.3 days).
The month with the least sunshine days is November (13.3 days).
Average UV index in September
Follonica, Italy
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Follonica, Italy
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Follonica, Italy
- 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).
Follonica, Italy
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