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
The move into September indicates a slight reduction in the average high-temperature, down from August's moderately hot 25.9°C (78.6°F) to an agreeable 21°C (69.8°F). During the month of September, Riva San Vitale anticipates a mean low-temperature of 11.5°C (52.7°F).Humidity
The average relative humidity in September is 74%.Rainfall
In September, in Riva San Vitale, the rain falls for 15.4 days. Throughout September, 67mm (2.64") of precipitation is accumulated. Throughout the year, there are 172.1 rainfall days, and 1177mm (46.34") of precipitation is accumulated.Snowfall
April through September are months without snowfall.Daylight
In Riva San Vitale, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 06:45 and sunset at 20:02. On the last day of September, sunrise is at 07:21 and sunset at 19:06 CEST.
Sunshine
In September, the average sunshine is 9.6h.UV index
In Riva San Vitale, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What is the temperature in September in Riva San Vitale?
What is the average humidity in September in Riva San Vitale?
How much does it rain in Riva San Vitale in September?
When it does not snow in Riva San Vitale?
Does it snow in Riva San Vitale in September?
What is the average length of the day in September in Riva San Vitale?
When are sunrise and sunset in September in Riva San Vitale?
How long on average sun shines in September in Riva San Vitale?
What is the UV index intensity in September in Riva San Vitale?
Average temperature in September
Riva San Vitale, Switzerland
- Average high temperature in September: 21°C
The warmest month (with the highest average high temperature) is July (26.3°C).
The month with the lowest average high temperature is January (4.8°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (15.2°C).
The coldest month (with the lowest average low temperature) is January (-0.9°C).
Average pressure in September
Riva San Vitale, Switzerland
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is December (1020.3mbar).
The month with the lowest atmospheric pressure is April (1014.9mbar).
Average wind speed in September
Riva San Vitale, Switzerland
- Average wind speed in September: 6.1km/h
The windiest month (with the highest average wind speed) is March (6.9km/h).
The calmest month (with the lowest average wind speed) is November (5.5km/h).
Average humidity in September
Riva San Vitale, Switzerland
- Average humidity in September: 74%
The month with the highest relative humidity is November (79%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Riva San Vitale, Switzerland
- Average rainfall in September: 67mm
The wettest month (with the highest rainfall) is November (177mm).
The driest month (with the least rainfall) is January (31mm).
Average rainfall days in September
Riva San Vitale, Switzerland
- Average rainfall days in September: 15.4 days
The months with the highest number of rainy days are June and July (20.2 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in September
Riva San Vitale, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (69mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Riva San Vitale, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Riva San Vitale, Switzerland
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is November (Average sunshine: 5h and 18min).
Average sunshine days in September
Riva San Vitale, Switzerland
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is June (6 days).
Average UV index in September
Riva San Vitale, Switzerland
- Average UV index in September: 4
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
Riva San Vitale, Switzerland
- Average cloud cover in September: 28
The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in September
Riva San Vitale, Switzerland
- 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).
Riva San Vitale, Switzerland
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