Ovronnaz Weather in September

Ovronnaz in September averages 15°C (59°F) during the day and 4°C (39°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Ovronnaz in September

This month experiences about 14 days of rain according to historical data, averaging 135 mm (5.3 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Ovronnaz in September

In September, Ovronnaz sees moderate temperatures, with highs of 15°C (59°F). Nights drop to around 4°C (39°F). Conditions are often most pleasant around the middle of the day. With overnight lows of 4°C (39°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Ovronnaz in September

Expect a lot of sunshine this month, with about 210 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Ovronnaz in September

September sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.

Should you favor a climate that's both dry and comfortably warm, August typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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

Ovronnaz Temperature in September

Min Temperature 4°C (39°F)  

Max Temperature 15°C (59°F)  

Chance of Rain 46%  

Precipitation 135 mm (5.3 in)  

Rainy days 14 days  

Humidity 71% *  

Windspeed 2 m/s (4 knots) *  

Sunshine 210 hours *  

Percentage Sunshine 65% *  

* Data from: Sion, Switzerland (12 KM, 8 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Ovronnaz typically drop from around 22°C (72°F) at the start of September to approximately 18°C (64°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 11°C (52°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Ovronnaz in September

Browse day-by-day weather records for Ovronnaz spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Ovronnaz historical weather extremes in September

According to our 49 years of weather records for Ovronnaz, the following extremes were recorded between 1976 and 2025.

• The hottest September day on record in Ovronnaz reached 34°C (93°F) (September 5, 2023).
• The coldest September day was on September 22, 1979, with a maximum of 8°C (46°F).
• The lowest overnight temperature recorded in September was -12°C (10°F) (September 29, 1995).
• Peak precipitation in September occurred on September 2, 2004, when 36 mm (1.4 in) of precipitation was measured.

What to Wear in Ovronnaz in September

Pack for changing conditions in Ovronnaz in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Ovronnaz in September

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

Cycling

5/10

Walking

5/10

Camping

3/10

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 Ovronnaz's climate page.

More climate data for Ovronnaz

Temperature Rainfall Sunshine Humidity Wind Speed

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