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
Weather in September
Temperature
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from 29.2°C (84.6°F) to a still moderately hot 25.4°C (77.7°F). September's nights in Ostia Antica observe an average temperature of 19.7°C (67.5°F).Humidity
In September, the average relative humidity in Ostia Antica is 66%.Rainfall
In Ostia Antica, Italy, in September, during 10.6 rainfall days, 45mm (1.77") of precipitation is typically accumulated. In Ostia Antica, during the entire year, the rain falls for 127.8 days and collects up to 467mm (18.39") of precipitation.Daylight
In Ostia Antica, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 06:37 and sunset at 19:44. On the last day of September, in Ostia Antica, sunrise is at 07:07 and sunset at 18:54 CEST.
Sunshine
The average sunshine in September is 10.8h.UV index
In Ostia Antica, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 6 turns into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
What is the average September temperature in Ostia Antica?
What is the average humidity in September in Ostia Antica?
How many days does it rain in September in Ostia Antica?
What is the average length of the day in September in Ostia Antica?
What time are sunrise and sunset in September in Ostia Antica?
How many hours of sunshine does Ostia Antica have in September?
How high is the UV index in September in Ostia Antica?
Average temperature in September
Ostia Antica, Italy
- Average high temperature in September: 25.4°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (12.3°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 (7.8°C).
Average pressure in September
Ostia Antica, Italy
- Average pressure in September: 1015.7mbar
The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is April (1014.1mbar).
Average wind speed in September
Ostia Antica, Italy
- Average wind speed in September: 12km/h
The windiest month (with the highest average wind speed) is February (16.8km/h).
The calmest month (with the lowest average wind speed) is August (11.2km/h).
Average humidity in September
Ostia Antica, Italy
- Average humidity in September: 66%
The months with the highest relative humidity are January, March, April and November (73%).
The month with the lowest relative humidity is August (63%).
Average rainfall in September
Ostia Antica, Italy
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is November (107mm).
The driest month (with the least rainfall) is August (10mm).
Average rainfall days in September
Ostia Antica, Italy
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is November (15.6 days).
The month with the least rainy days is August (4.3 days).
Average daylight in September /
Average sunshine in September
Ostia Antica, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in September
Ostia Antica, Italy
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is November (11.7 days).
Average UV index in September
Ostia Antica, 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 and December (UV index 3).
Average cloud cover in September
Ostia Antica, Italy
- Average cloud cover in September: 18
The month with the most cloud cover is January (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in September
Ostia Antica, 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).
Ostia Antica, Italy
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