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
As August transitions to September, the average high-temperature falls from a hot 30.3°C (86.5°F) to a moderately hot 24.7°C (76.5°F). Grotte di Castro observes an average low-temperature of 13.8°C (56.8°F) during September.Humidity
In September, the average relative humidity in Grotte di Castro is 71%.Rainfall
In Grotte di Castro, Italy, in September, it is raining for 10.5 days, with typically 35mm (1.38") of accumulated precipitation. Throughout the year, in Grotte di Castro, Italy, there are 140.1 rainfall days, and 556mm (21.89") of precipitation is accumulated.Snowfall
In Grotte di Castro, snow does not fall in April through October.Daylight
In Grotte di Castro, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 06:37 and sunset at 19:46. On the last day of the month, sunrise is at 07:09 and sunset at 18:55 CEST.
Sunshine
In Grotte di Castro, the average sunshine in September is 10.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 during September leads to these advisories:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Grotte di Castro?
What is the average humidity in September in Grotte di Castro?
How much does it rain in Grotte di Castro in September?
When it does not snow in Grotte di Castro?
How many hours of daylight does Grotte di Castro have in September?
What time are sunrise and sunset in September in Grotte di Castro?
How many hours of sunshine does Grotte di Castro have in September?
How high is the UV index in September in Grotte di Castro?
Average temperature in September
Grotte di Castro, Italy
- Average high temperature in September: 24.7°C
The warmest month (with the highest average high temperature) is August (30.3°C).
The month with the lowest average high temperature is January (8.7°C).
- Average low temperature in September: 13.8°C
The month with the highest average low temperature is August (17.2°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).
Average pressure in September
Grotte di Castro, Italy
- Average pressure in September: 1015.5mbar
The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is July (1013.7mbar).
Average wind speed in September
Grotte di Castro, Italy
- Average wind speed in September: 8.9km/h
The windiest month (with the highest average wind speed) is February (12.4km/h).
The calmest month (with the lowest average wind speed) is July (7.7km/h).
Average humidity in September
Grotte di Castro, Italy
- Average humidity in September: 71%
The month with the highest relative humidity is November (85%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Grotte di Castro, Italy
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is November (86mm).
The driest month (with the least rainfall) is July (29mm).
Average rainfall days in September
Grotte di Castro, Italy
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is August (7.7 days).
Average snowfall in September
Grotte di Castro, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is January (104mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Grotte di Castro, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.6 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
Grotte di Castro, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 3min
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
Grotte di Castro, Italy
- Average sunshine days in September: 18 days
The month with the most sunshine days is August (22.1 days).
The month with the least sunshine days is April (12.4 days).
Average UV index in September
Grotte di Castro, Italy
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Grotte di Castro, Italy
- Average cloud cover in September: 22
The month with the most cloud cover is January (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Grotte di Castro, Italy
- Average visibility in September: 9km
The months with the highest visibility are July and August (10km).
The month with the lowest visibility is November (8km).
