Unterwasser Weather in September

September in Unterwasser averages 17°C (63°F) during the day and 8°C (46°F) at night. September is part of the rainy season, with around 182 mm (7.2 in) of rainfall and frequent showers.

Rainfall in Unterwasser in September

As part of the rainy season, Unterwasser sees around 14 days of rain in September, with an average of 182 mm (7.2 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.

Temperature in Unterwasser in September

Temperatures in Unterwasser in September top out at 17°C (63°F) and drop to 8°C (46°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 8°C (46°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Unterwasser in September

The city usually sees around 157 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).

Wind Speed in Unterwasser in September

Average wind conditions reach 6 m/s (12 knots) in September. This creates notably windy weather that is clearly felt and can influence daily activities. Keep in mind this is an average. Some days are less intense, while others can be quite gusty.

September in Unterwasser has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.

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

Unterwasser Temperature in September

Min Temperature 8°C (46°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 46%  

Precipitation 182 mm (7.2 in)  

Rainy days 14 days  

Humidity 78% *  

Windspeed 6 m/s (12 knots) *  

Sunshine 157 hours *  

Percentage Sunshine *  

* Data from: Säntis (the highest mountain in the Alpstein massif), Switzerland (3 KM, 2 Miles).

What to Wear in Unterwasser in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Unterwasser in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

5/10

Walking

5/10

Camping

3/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

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

More climate data for Unterwasser

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Unterwasser climate overview or explore weather in Switzerland.