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
September
Weather in September
Temperature
The decrease of average high-temperatures is mild in September, with a decline from a tropical 30.1°C (86.2°F) in August to a moderately hot 25°C (77°F). An average low-temperature of 16.5°C (61.7°F) is recorded during the nights in September.Humidity
In Castelguglielmo, the average relative humidity in September is 69%.Rainfall
In Castelguglielmo, during September, the rain falls for 10.5 days and regularly aggregates up to 39mm (1.54") of precipitation. In Castelguglielmo, during the entire year, the rain falls for 147.6 days and collects up to 620mm (24.41") of precipitation.Snowfall
In Castelguglielmo, snow does not fall in April through November.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 06:36 and sunset at 19:50. On the last day of the month, sunrise is at 07:11 and sunset at 18:56 CEST.
Sunshine
The average sunshine in September is 10.1h.UV index
In September, the average daily maximum UV index in Castelguglielmo is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 5 during September translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. To protect against the Sun's most potent rays, avoid direct exposure around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Castelguglielmo, Italy
- Average high temperature in September: 25°C
The warmest month (with the highest average high temperature) is August (30.1°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 16.5°C
The month with the highest average low temperature is August (19.4°C).
The coldest month (with the lowest average low temperature) is January (2.4°C).
Average pressure in September
Castelguglielmo, Italy
- Average pressure in September: 1016.3mbar
The month with the highest atmospheric pressure is December (1019.3mbar).
The months with the lowest atmospheric pressure are June and July (1014.2mbar).
Average wind speed in September
Castelguglielmo, Italy
- Average wind speed in September: 8km/h
The windiest month (with the highest average wind speed) is February (9.9km/h).
The calmest month (with the lowest average wind speed) is July (7.5km/h).
Average humidity in September
Castelguglielmo, Italy
- Average humidity in September: 69%
The month with the highest relative humidity is November (81%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Castelguglielmo, Italy
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is May (96mm).
The driest month (with the least rainfall) is August (24mm).
Average rainfall days in September
Castelguglielmo, Italy
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is July (7.7 days).
Average snowfall in September
Castelguglielmo, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (18mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Castelguglielmo, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 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
Castelguglielmo, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Castelguglielmo, Italy
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is July (22.4 days).
The month with the least sunshine days is May (9.1 days).
Average UV index in September
Castelguglielmo, Italy
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in September
Castelguglielmo, Italy
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Castelguglielmo, Italy
- Average visibility in September: 10km
The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, November and December (9km).
