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The weather in September in Aargau
Looking for great weather? September is a good time to be in Aargau. 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 Aargau, 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 Aargau
Click on any day in September to get detailed info about the usual weather on that day in Aargau. Check out the historical temperatures and precipitation over the past 10 years on this day.
Average temperatures
It's pleasantly warm in September in Aargau with an average temperature of 22°C. Temperatures this month range from a low of 19°C to a high of 25°C. At night, you can expect temperatures between 9°C and 14°C.
Temperature records
With 31°C in 2023, Aargau reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 9°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 18°C.
Rainfall amount
In September, there is an average of 61 mm of precipitation, spread over 9 days. The wind speed is around 2 Bft, mostly coming from the South.
September weather comparison
| Aargau | New York | |
|---|---|---|
| Average temperature | 22°C | 27°C |
| Max. temperature | 25°C | 31°C |
| Min. temperature | 9°C | -5°C |
| Total precipitation | 61 mm | 57 mm |
| Rainy days | 9 days | 9 days |
Start of September
The month of September starts in Aargau with warm temps, averaging around 23°C during the day and nights around 13°C.
Mid September
By mid-September, daytime temps stay steady at around 23°C, with nights around 13°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Aargau is around 20°C, while nighttime temps are about 10°C. A shower might pop up, but overall, the weather will be dry and sunny.
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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.
Check out the climate of Aargau 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 Aargau, Switzerland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Aargau
Temperature in September in Aargau over the years
Precipitation charts
These charts show the average amount of precipitation in September in Aargau, 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 Aargau
Total precipitation in September in Aargau over the years
Daily UV index in September in Aargau
This chart shows the average daily UV index in September in Aargau, 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 Aargau
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Average weather in Aargau by month
Click on a month below to see detailed weather info for Aargau. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.