Normal weather for Basel in September
It's warm in September in Basel 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.
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.
Basel in September |
New York | ||
|---|---|---|---|
 Average Temperature |
23°C | 27°C | |
 High Temp |
26°C | 31°C | |
| Low Temp |
19°C | 21°C | |
 Total Precipitation |
50 mm | 57 mm | |
| Rainy Days |
8 days | 9 days | |
Start of September
The month of September starts in Basel with warm temps, averaging around 24°C during the day and nights around 14°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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.
Since it cools down at night, it’s a good idea to wear layers. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
End of September
By the end of September, the average daytime temperature in Basel 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.
Because temperatures drop in the evening, wearing layers is recommended. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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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.
Is September a good time to visit Basel?
Looking for great weather? September is a good time to be in Basel. The temperatures are nice, and there’s not too much rain.
Temperature records for Basel in September
Check out the climate of Basel 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.
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Daily Temperature in September in Basel
This chart shows the average daily high and low temperatures in September for Basel, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Basel
The chart below shows the average daily precipitation in September for Basel, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 8 days of precipitation in Basel.
Daily UV Index in September in Basel
This chart shows the average daily UV index in September in Basel, 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.
Temperature in September in Basel Over the Years
This chart shows the average temperature in September in Basel, measured in degrees Celsius, over the past few years.
Total Precipitation in September in Basel Over the Years
This chart shows the average precipitation in September in Basel, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in September for Basel
Click on any day in September to get detailed info about the usual weather on that day in Basel. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Basel
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Average Weather in Basel by Month
Click on a month below to see detailed weather info for Basel. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
