September weather forecastPosillipo, Italy
September
Weather in September
September, the first month of the autumn in Posillipo, is also a moderately hot month, with temperature in the range of an average low of 19.7°C (67.5°F) and an average high of 25.8°C (78.4°F).Temperature
The average high-temperature shows a slight dip in September, from August's 29.9°C (85.8°F) to a still warm 25.8°C (78.4°F). Posillipo witnesses a consistent average low-temperature of 19.7°C (67.5°F) throughout September.Humidity
In September, the average relative humidity in Posillipo, Italy, is 64%.Rainfall
In Posillipo, Italy, in September, during 11.5 rainfall days, 49mm (1.93") of precipitation is typically accumulated. In Posillipo, during the entire year, the rain falls for 133.1 days and collects up to 538mm (21.18") of precipitation.Snowfall
March through December are months without snowfall in Posillipo.Daylight
In Posillipo, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 06:30 and sunset at 19:35. On the last day of the month, sunrise is at 06:59 and sunset at 18:46 CEST.
Sunshine
In Posillipo, the average sunshine in September is 10.9h.UV index
The average daily maximum UV index in September in Posillipo is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Posillipo, Italy
- Average high temperature in September: 25.8°C
The warmest month (with the highest average high temperature) is August (29.9°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 months (with the lowest average low temperature) are January and February (8°C).
Average pressure in September
Posillipo, Italy
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is April (1014mbar).
Average wind speed in September
Posillipo, Italy
- Average wind speed in September: 10.4km/h
The windiest month (with the highest average wind speed) is February (14.2km/h).
The calmest month (with the lowest average wind speed) is August (9km/h).
Average humidity in September
Posillipo, Italy
- Average humidity in September: 64%
The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Posillipo, Italy
- Average rainfall in September: 49mm
The wettest month (with the highest rainfall) is November (115mm).
The driest month (with the least rainfall) is August (9mm).
Average rainfall days in September
Posillipo, Italy
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is November (14.9 days).
The month with the least rainy days is August (4.9 days).
Average snowfall in September
Posillipo, Italy
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (2mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Posillipo, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Posillipo, Italy
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Posillipo, Italy
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is February (13.8 days).
Average UV index in September
Posillipo, Italy
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Posillipo, Italy
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in September
Posillipo, 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).
