Weathermondo.com
Switzerland
The weather in September in Basel-Stadt
Looking for great weather? September is a good time to be in Basel-Stadt. The temperatures are nice, and there’s not too much rain.
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Basel-Stadt, Switzerland. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Daily weather in September for Basel-Stadt
Click on any day in September to get detailed info about the usual weather on that day in Basel-Stadt. Check out the historical temperatures and precipitation over the past 10 years on this day.
Average temperatures
It's warm in September in Basel-Stadt with an average temperature of 23°C. Temperatures this month range from a low of 19°C to a high of 26°C. At night, you can expect temperatures between 9°C and 15°C.
Temperature records
With 33°C in 2023, Basel-Stadt reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 10°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 2°C to a highest value of 20°C.
Rainfall amount
In September, there is an average of 50 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the South.
September weather comparison
| Basel-Stadt | New York | |
|---|---|---|
| Average temperature | 23°C | 27°C |
| Max. temperature | 26°C | 31°C |
| Min. temperature | 9°C | -5°C |
| Total precipitation | 50 mm | 57 mm |
| Rainy days | 8 days | 9 days |
Start of September
The month of September starts in Basel-Stadt with warm temps, averaging around 24°C during the day and nights around 14°C.
Mid September
By mid-September, daytime temps stay steady at around 24°C, with nights around 13°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of September
By the end of September, the average daytime temperature in Basel-Stadt is around 21°C, while nighttime temps are about 11°C. A shower might pop up, but overall, the weather will be dry and sunny.
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Basel-Stadt for all months and discover the best travel time
Curious about the weather in other parts of Switzerland? Check out the climate and weather for spots like Zurich, Geneva, Valais, or explore other destinations in Switzerland.
Temperature charts
These charts show the average temperatures in September in Basel-Stadt, Switzerland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Basel-Stadt
Temperature in September in Basel-Stadt over the years
Precipitation charts
These charts show the average amount of precipitation in September in Basel-Stadt, Switzerland. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Basel-Stadt
Total precipitation in September in Basel-Stadt over the years
Daily UV index in September in Basel-Stadt
This chart shows the average daily UV index in September in Basel-Stadt, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Basel-Stadt
Have you been to Basel-Stadt in September?
Share your weather experience in September in Basel-Stadt.
Average weather in Basel-Stadt by month
Click on a month below to see detailed weather info for Basel-Stadt. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.