September weather forecastSissach, Switzerland
September weather for Sissach, Switzerland: The first month of the autumn, September, is still a comfortable month in Sissach, Switzerland, with an average temperature fluctuating between 19.4°C (66.9°F) and 9°C (48.2°F). On the first day of September in Sissach, sunrise is at 06:48 and sunset at 20:08.
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Sissach, Switzerland, with an average temperature fluctuating between 19.4°C (66.9°F) and 9°C (48.2°F).Temperature
September brings a slight decrease in the average high-temperature, shifting from a moderately hot 23.8°C (74.8°F) in August to an enjoyable 19.4°C (66.9°F). September nights in Sissach, Switzerland, are marked by an average temperature drop to a frosty 9°C (48.2°F).Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall in Sissach, Switzerland. Rain falls for 13.6 days and accumulates 41mm (1.61") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Sissach is 12h and 34min.On the first day of the month, sunrise is at 06:48 and sunset at 20:08. On the last day of September, sunrise is at 07:27 and sunset at 19:10 CEST.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September in Sissach is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 4 translates into these guidelines:
Put precautions into practice - Ensuring skin and eye safety is a necessity. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sissach, Switzerland
- Average high temperature in September: 19.4°C
The warmest months (with the highest average high temperature) are July and August (23.8°C).
The month with the lowest average high temperature is January (3.4°C).
- Average low temperature in September: 9°C
The months with the highest average low temperature are July and August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-2.3°C).
Average pressure in September
Sissach, Switzerland
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The months with the lowest atmospheric pressure are April and November (1015.7mbar).
Average wind speed in September
Sissach, Switzerland
- Average wind speed in September: 6.8km/h
The windiest month (with the highest average wind speed) is March (9.4km/h).
The calmest month (with the lowest average wind speed) is August (6.4km/h).
Average humidity in September
Sissach, Switzerland
- Average humidity in September: 81%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Sissach, Switzerland
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is June (100mm).
The driest month (with the least rainfall) is September (41mm).
Average rainfall days in September
Sissach, Switzerland
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is October (13 days).
Average snowfall in September
Sissach, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (88mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sissach, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sissach, Switzerland
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Sissach, Switzerland
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is October (15 days).
The month with the least sunshine days is June (6.1 days).
Average UV index in September
Sissach, Switzerland
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Sissach, Switzerland
- Average cloud cover in September: 35
The months with the most cloud cover are January and December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Sissach, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July and August (9km).
The months with the lowest visibility are January, February, September, October, November and December (8km).
