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
Weather in September
Temperature
September is marked by a subtle drop in average high-temperatures, transitioning from 28°C (82.4°F) in August to a still moderately hot 23.7°C (74.7°F). In September, the nighttime temperature lowers to an average of 18.4°C (65.1°F).Humidity
The average relative humidity in September is 68%.Rainfall
In San Costanzo, in September, during 11.1 rainfall days, 32mm (1.26") of precipitation is typically accumulated. In San Costanzo, during the entire year, the rain falls for 127.1 days and collects up to 378mm (14.88") of precipitation.Snowfall
March through November are months without snowfall.Daylight
The average length of the day in September is 12h and 31min.On the first day of September in San Costanzo, sunrise is at 06:31 and sunset at 19:43. On the last day of the month, sunrise is at 07:04 and sunset at 18:50 CEST.
Sunshine
In San Costanzo, the average sunshine in September is 10.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What is the average September temperature in San Costanzo?
What is the average humidity in September in San Costanzo?
How many days does it rain in September in San Costanzo?
When it does not snow in San Costanzo?
What is the average length of the day in September in San Costanzo?
When is the sunrise / sunset in September in San Costanzo?
How long on average sun shines in September in San Costanzo?
What is the UV index reading in September in San Costanzo?
Average temperature in September
San Costanzo, Italy
- Average high temperature in September: 23.7°C
The warmest month (with the highest average high temperature) is August (28°C).
The month with the lowest average high temperature is January (9.4°C).
- Average low temperature in September: 18.4°C
The month with the highest average low temperature is August (21.9°C).
The coldest month (with the lowest average low temperature) is January (6.1°C).
Average pressure in September
San Costanzo, Italy
- Average pressure in September: 1015.5mbar
The month with the highest atmospheric pressure is December (1018.7mbar).
The month with the lowest atmospheric pressure is July (1013.4mbar).
Average wind speed in September
San Costanzo, Italy
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is February (14.7km/h).
The calmest month (with the lowest average wind speed) is June (10.4km/h).
Average humidity in September
San Costanzo, Italy
- Average humidity in September: 68%
The month with the highest relative humidity is November (77%).
The months with the lowest relative humidity are July and August (63%).
Average rainfall in September
San Costanzo, Italy
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is May (49mm).
The driest month (with the least rainfall) is August (22mm).
Average rainfall days in September
San Costanzo, Italy
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is August (7.9 days).
Average snowfall in September
San Costanzo, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is January (12mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
San Costanzo, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
San Costanzo, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
San Costanzo, Italy
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is August (20.8 days).
The months with the least sunshine days are February and May (15.3 days).
Average UV index in September
San Costanzo, Italy
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
San Costanzo, Italy
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in September
San Costanzo, 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).
San Costanzo, Italy
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