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
In Castellanza, entering September brings a subtle temperature decrement, reducing from August's moderately hot 27.7°C (81.9°F) to an agreeable 22.8°C (73°F). An average nighttime temperature of 13.6°C (56.5°F) is witnessed throughout September.Humidity
In September, the average relative humidity in Castellanza is 72%.Rainfall
In Castellanza, Italy, in September, it is raining for 14.8 days, with typically 72mm (2.83") of accumulated precipitation. Throughout the year, in Castellanza, Italy, there are 178.4 rainfall days, and 1147mm (45.16") of precipitation is accumulated.Snowfall
In Castellanza, Italy, snow does not fall in April through October.Daylight
In Castellanza, Italy, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 06:46 and sunset at 20:02. On the last day of the month, sunrise is at 07:22 and sunset at 19:06 CEST.
Sunshine
The average sunshine in September is 9.6h.UV index
In Castellanza, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Take precautions - Protection against sunburn is recommended. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Castellanza?
What is the average humidity in September in Castellanza?
How many days does it rain in September in Castellanza?
When it does not snow in Castellanza?
How many hours of daylight does Castellanza have in September?
When is the sunrise / sunset in September in Castellanza?
How long on average sun shines in September in Castellanza?
What is the UV index intensity in September in Castellanza?
Average temperature in September
Castellanza, Italy
- Average high temperature in September: 22.8°C
The warmest month (with the highest average high temperature) is July (27.9°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is August (17.7°C).
The coldest month (with the lowest average low temperature) is January (0.6°C).
Average pressure in September
Castellanza, Italy
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is December (1020.2mbar).
The month with the lowest atmospheric pressure is April (1014.7mbar).
Average wind speed in September
Castellanza, Italy
- Average wind speed in September: 5.7km/h
The windiest month (with the highest average wind speed) is March (6.8km/h).
The calmest month (with the lowest average wind speed) is December (5.4km/h).
Average humidity in September
Castellanza, Italy
- Average humidity in September: 72%
The month with the highest relative humidity is November (79%).
The months with the lowest relative humidity are April, July and August (70%).
Average rainfall in September
Castellanza, Italy
- Average rainfall in September: 72mm
The wettest month (with the highest rainfall) is November (172mm).
The driest month (with the least rainfall) is January (33mm).
Average rainfall days in September
Castellanza, Italy
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in September
Castellanza, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (48mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Castellanza, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Castellanza, 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: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is November (Average sunshine: 5h and 6min).
Average sunshine days in September
Castellanza, Italy
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (5.9 days).
Average UV index in September
Castellanza, Italy
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Castellanza, Italy
- Average cloud cover in September: 28
The month with the most cloud cover is November (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility in September
Castellanza, Italy
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
