Cossonay Weather in September

Thinking of visiting Cossonay in September? Expect pleasant temperatures reaching 19°C (66°F) during the day, dropping to 12°C (54°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Cossonay in September

Expect around 13 days of rain based on historical data, with 125 mm (4.9 in) average. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Cossonay in September

In September, Cossonay gets pleasant temperatures, with highs of 19°C (66°F). Nights cool to around 12°C (54°F). Conditions are often most pleasant around the middle of the day. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Cossonay in September

The month experiences a moderate amount of sunlight, with 185 hours of sunshine. This provides a nice balance between sunshine and clouds.

If your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Cossonay.

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 Cossonay's climate page.

Cossonay Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 42%  

Precipitation 125 mm (4.9 in)  

Rainy days 13 days  

Humidity 73% *  

Sunshine 185 hours *  

Percentage Sunshine 52% *  

* Data from: Lausanne, Switzerland (13 KM, 8 Miles).

What to Wear in Cossonay 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. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Cossonay in September

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

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

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 Cossonay's climate page.

More climate data for Cossonay

Temperature Rainfall Sunshine Humidity

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