September weather forecastGrottole, Italy
September
Weather in September
September, the first month of the autumn in Grottole, is also a moderately hot month, with an average temperature fluctuating between 27°C (80.6°F) and 18.4°C (65.1°F).Temperature
The start of September involves a temperature drop, moving from a tropical 32.4°C (90.3°F) in August to a moderately hot 27°C (80.6°F). In the month of September, Grottole experiences an average low-temperature of 18.4°C (65.1°F).Heat index
In September, the average heat index is estimated at 28°C (82.4°F). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.Bear in mind that the heat index values are determined for shaded areas and light breezes. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
In Grottole, the average relative humidity in September is 58%.Rainfall
In September, the rain falls for 10 days. Throughout September, 22mm (0.87") of precipitation is accumulated. Throughout the year, there are 139.2 rainfall days, and 421mm (16.57") of precipitation is accumulated.Snowfall
In Grottole, snow does not fall in May through October.Daylight
In September, the average length of the day in Grottole is 12h and 28min.On the first day of the month, sunrise is at 06:22 and sunset at 19:26. On the last day of September, in Grottole, sunrise is at 06:50 and sunset at 18:38 CEST.
Sunshine
The average sunshine in September is 10.7h.UV index
In Grottole, Italy, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 6 in September transforms into the following instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grottole, Italy
- Average high temperature in September: 27°C
The warmest month (with the highest average high temperature) is August (32.4°C).
The month with the lowest average high temperature is January (11.4°C).
- Average low temperature in September: 18.4°C
The month with the highest average low temperature is August (22.2°C).
The coldest month (with the lowest average low temperature) is January (4.8°C).
Average pressure in September
Grottole, Italy
- Average pressure in September: 1014.9mbar
The month with the highest atmospheric pressure is December (1017.8mbar).
The month with the lowest atmospheric pressure is July (1012.8mbar).
Average wind speed in September
Grottole, Italy
- Average wind speed in September: 10.1km/h
The windiest month (with the highest average wind speed) is February (14.9km/h).
The calmest months (with the lowest average wind speed) are August and September (10.1km/h).
Average humidity in September
Grottole, Italy
- Average humidity in September: 58%
The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are July and August (48%).
Average rainfall in September
Grottole, Italy
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is April (55mm).
The driest month (with the least rainfall) is August (12mm).
Average rainfall days in September
Grottole, Italy
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is April (15.7 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in September
Grottole, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (16mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Grottole, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Grottole, Italy
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in September
Grottole, Italy
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is February (11.4 days).
Average UV index in September
Grottole, 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
Grottole, Italy
- Average cloud cover in September: 17
The month with the most cloud cover is January (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Grottole, Italy
- Average visibility in September: 10km
The months with the highest visibility are February, March, May, June, July, August, September, October and December (10km).
The months with the lowest visibility are January, April and November (9km).
