Temperatures in September
It's cool to moderate in September in Grächen 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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Grächen in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Grächen with mild temperatures, averaging around 19°C during the day and nights close to 10°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature drops to around 18°C, with nights close to 9°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
End of September
By the end of September, the average daytime temperature in Grächen will be around 16°C, with nights close to 7°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
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Precipitation in September
In September, there is an average of 26 mm of precipitation, spread over 6 days. Of the total precipitation, about 1,8 cm falls as snow in September. The wind speed is around 2 Bft, mostly coming from the West.
The average precipitation chance is 22% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Grächen. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Grächen in September |
London | ||
|---|---|---|---|
 Average Temperature |
17°C | 20°C | |
 High Temp |
20°C | 22°C | |
| Low Temp |
14°C | 17°C | |
 Total Precipitation |
26 mm | 44 mm | |
| Rainy Days |
6 days | 8 days | |
 Total Snowfall |
1,8 cm | 0 cm | |
| Snowy Days |
1 day | 0 days | |
August
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.
Is September a good time to visit Grächen?
Looking for sun and warm weather? Then September isn’t the best time to be in Grächen. The temperature is too low this month for a warm stay.
Temperature records for Grächen in September
With 29°C, Grächen hit the highest temperature in the last 10 years in September 2018. The lowest daytime temperature in this month was 4°C in 2020. The extreme night temperatures ranged from a low of -3°C to a high of 16°C.
Check out the climate of Grächen for all months and discover the best travel time
Curious about the climate in other parts of Switzerland? Check out the weather and climate in places like Zurich, Geneva, Valais, or have a look at other destinations in Switzerland.
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Daily Temperature in September in Grächen
This chart shows the average daily temperatures, both day and night, for each day in September in Grächen, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Grächen
The chart below shows the average daily precipitation in September for Grächen, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 6 days of rain in Grächen.
Daily Snowfall in September in Grächen
This chart shows the average daily snowfall in September in Grächen, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.
Daily UV Index in September in Grächen
This chart shows the average daily UV index in September in Grächen, 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 Grächen Over the Years
This chart shows the average temperature in September in Grächen, measured in degrees Celsius, over the past years.
Total Precipitation in September in Grächen Over the Years
This chart shows the average precipitation in September in Grächen, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in September in Grächen per year
This chart shows the average snowfall in September in Grächen, measured in centimetres, over the past years.
Daily climate in September for Grächen
Click on a specific day in September for detailed info on the typical weather on that day in Grächen. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Grächen
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Average Weather in Grächen by Month
Click on a month below to see detailed weather info for Grächen. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
