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Switzerland
The weather in September in Arosa
Looking for sun? September isn’t a good month to be in Arosa. There’s too much chance of rain this month.
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Arosa, 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 Arosa
Click on any day in September to get detailed info about the usual weather on that day in Arosa. Check out the historical temperatures and precipitation over the past 10 years on this day.
Average temperatures
It's cool in September in Arosa with an average temperature of 13°C. Temperatures this month range from a low of 11°C to a high of 17°C. At night, you can expect temperatures between 3°C and 9°C.
Temperature records
With 25°C in 2022, Arosa 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 -4°C to a highest value of 14°C.
Precipitation and snowfall
In September, there is an average of 106 mm of precipitation, spread over 13 days. Of the total precipitation, about 9,8 cm falls as snow in September. The wind speed is around 3 Bft, mostly coming from the South.
September weather comparison
| Arosa | New York | |
|---|---|---|
| Average temperature | 13°C | 27°C |
| Max. temperature | 17°C | 31°C |
| Min. temperature | 3°C | -5°C |
| Total precipitation | 106 mm | 57 mm |
| Rainy days | 13 days | 9 days |
| Total snowfall | 9,8 cm | 0 cm |
| Snowy days | 6 days | 0 days |
Start of September
The month of September starts in Arosa with cool temps, averaging around 14°C during the day and nights around 8°C.
Mid September
By mid-September, daytime temps rise to around 15°C, with nights around 8°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 Arosa is around 12°C, while nighttime temps are about 5°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 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 Arosa 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 Arosa, Switzerland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Arosa
Temperature in September in Arosa over the years
Precipitation charts
These charts show the average amount of precipitation in September in Arosa, 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 Arosa
Total precipitation in September in Arosa over the years
Daily Snowfall in September in Arosa
Snowfall in September in Arosa per year
Daily UV index in September in Arosa
This chart shows the average daily UV index in September in Arosa, 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 Arosa
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Average weather in Arosa by month
Click on a month below to see detailed weather info for Arosa. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.