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Switzerland
The weather in September in Ayer
It's cool to moderate in September in Ayer with an average temperature of 17°C. Temperatures this month range from a low of 14°C to a high of 20°C. At night, you can expect temperatures between 5°C and 10°C.
Looking for sun and warm weather? September isn’t a good month to be in Ayer. The temperatures are too low for a warm stay this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Ayer, 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.
Temperature records
With 34°C in 2023, Ayer reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 2°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 15°C.
Precipitation and snowfall
In September, there is an average of 35 mm of precipitation, spread over 7 days. Of the total precipitation, about 1,6 cm falls as snow in September. The wind speed is around 3 Bft, mostly coming from the Southwest.
Daily weather in September for Ayer
Click on any day in September to get detailed info about the usual weather on that day in Ayer. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Ayer | New York | |
|---|---|---|
| Average temperature | 17°C | 27°C |
| Max. temperature | 20°C | 31°C |
| Min. temperature | 5°C | -5°C |
| Total precipitation | 35 mm | 57 mm |
| Rainy days | 7 days | 9 days |
| Total snowfall | 1,6 cm | 0 cm |
| Snowy days | 1 day | 0 days |
Start of September
The month of September starts in Ayer with mild temps, averaging around 19°C during the day and nights around 9°C.
Mid September
By mid-September, daytime temps drop to around 18°C, with nights around 9°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 Ayer is around 16°C, while nighttime temps are about 7°C. A shower might pop up, but overall, the weather will be dry and sunny.
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Ayer 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 Ayer, Switzerland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Ayer
Temperature in September in Ayer over the years
Precipitation charts
These charts show the average amount of precipitation in September in Ayer, 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 Ayer
Total precipitation in September in Ayer over the years
Daily Snowfall in September in Ayer
Snowfall in September in Ayer per year
Daily UV index in September in Ayer
This chart shows the average daily UV index in September in Ayer, 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 Ayer
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Average weather in Ayer by month
Click on a month below to see detailed weather info for Ayer. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.