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Grisons Switzerland
Weather in September
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Weather in September in Grisons

Planning a trip to Grisons this September? Here's what you need to know about the weather:

What is the weather like in Grisons in September?

Grisons is a region in Switzerland. September in Grisons generally has temperatures that range from cold to mild, with precipitation levels ranging from moderate to heavy.

Temperatures

During the day temperatures vary from cold in Sta Maria Val Müstair at 11°C to mild in Verdabbio at 17°C. At night it cools down to 8°C in Verdabbio and 1°C in Sta Maria Val Müstair.

For specific regional insights in Grisons, refer to the map provided below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Sta Maria Val Müstair with an average of 88 mm to heavy rainfall in Sedrun with 172 mm.

Average sunshine

Most areas experience a moderate amount of sunshine, with approximately 162 hours of sunlight expected in Davos. This makes it neither too gloomy nor overly bright.

For an in-depth overview of the yearly conditions, do visit our Grisons climate page.

Where to go in Grisons in September

Find more information for the most popular destinations in the Grisons on the map below. Click on a destination dot for more details.

Weather conditions Weather
Temperatures
Precipitation
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Leaflet © OpenStreetMap
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Select a Month of Interest

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit Switzerland, check out our Grisons's climate page.

Popular destinations

What is the weather like in September for the 5 most popular destinations in Grisons?

Davos

In September Davos generally has moderate temperatures with maximum daytime temperatures around 13°C, minimum nighttime temperatures around 2°C and high monthly rainfall. So on average the conditions are poor that month.

Davos
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
17°C 
6°C 
180 hours 
172 mm 
20 days 
unpleasant 
September September
13°C 
2°C 
162 hours 
129 mm 
15 days 
poor 
October   >> October
>>  
8°C 
-2°C 
144 hours 
114 mm 
14 days 
poor 
Climate in Davos

Arosa

In September Arosa generally has moderate temperatures with maximum daytime temperatures around 13°C, minimum nighttime temperatures around 3°C and high monthly rainfall. So on average the conditions are poor that month.

Arosa
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
17°C 
6°C 
180 hours 
173 mm 
20 days 
unpleasant 
September September
13°C 
3°C 
162 hours 
131 mm 
15 days 
poor 
October   >> October
>>  
9°C 
-1°C 
144 hours 
116 mm 
13 days 
poor 
Climate in Arosa

Silvaplana

In September Silvaplana generally has moderate temperatures with maximum daytime temperatures around 12°C, minimum nighttime temperatures around 2°C and high monthly rainfall. So on average the conditions are poor that month.

Silvaplana
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
16°C 
6°C 
183 hours 
155 mm 
20 days 
unpleasant 
September September
12°C 
2°C 
156 hours 
124 mm 
15 days 
poor 
October   >> October
>>  
7°C 
-2°C 
140 hours 
133 mm 
14 days 
poor 
Climate in Silvaplana

St. Moritz

In September St. Moritz generally has low temperatures with maximum daytime temperatures around 11°C, minimum nighttime temperatures around 2°C and high monthly rainfall. So on average the conditions are poor that month.

St. Moritz
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
16°C 
5°C 
183 hours 
151 mm 
20 days 
unpleasant 
September September
11°C 
2°C 
156 hours 
118 mm 
15 days 
poor 
October   >> October
>>  
6°C 
-3°C 
140 hours 
126 mm 
14 days 
poor 
Climate in St. Moritz

Samnaun

In September Samnaun generally has moderate temperatures with maximum daytime temperatures around 12°C, minimum nighttime temperatures around 2°C and high monthly rainfall. So on average the conditions are poor that month.

Samnaun
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
16°C 
5°C 
157 mm 
20 days 
unpleasant 
September September
12°C 
2°C 
119 mm 
15 days 
poor 
October   >> October
>>  
8°C 
-3°C 
102 mm 
13 days 
poor 
Climate in Samnaun

Is your destination not in the list? Have a look at other destinations in Grisons, in Switzerland.

Is September the best time to visit Grisons?

Given the typically poor weather conditions in Davos, September may not be the ideal time to visit Grisons.

Generally speaking, the best visiting conditions can be found in July and August offering mostly unpleasant weather in Davos.

Interested in more climate information?

We have much more information about the climate in Grisons.

Weather and climate has detailed information for every country in the world. Are you going to Switzerland? Get detailed historical weather averages for many cities in Switzerland.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.