Zürich Weather in September

Zürich in September sees pleasant daytime temperatures of 20°C (68°F) and nighttime lows of 11°C (52°F). Rainfall is fairly high this month at around 115 mm (4.5 in), so pack a rain jacket to stay dry.

Rainfall in Zürich in September

Typically around 13 days of rainfall are expected, averaging 115 mm (4.5 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Zürich in September

Zürich in September gets highs of 20°C (68°F) during the day and drops to 11°C (52°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Zürich in September

The month experiences a moderate amount of sunlight, with 166 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Zürich in September

Wind speeds average 2 m/s (4 knots) during September. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.

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

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

Zürich Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 43%  

Precipitation 115 mm (4.5 in)  

Rainy days 13 days  

Humidity 78%  

Windspeed 2 m/s (4 knots)  

Sunshine 166 hours  

Percentage Sunshine 48%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Zürich typically drop from around 21°C (70°F) at the start of September to approximately 17°C (63°F) by the end. Nights are cool, with lows typically ranging from 9°C (48°F) to 12°C (54°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 Zürich in September

Browse day-by-day weather records for Zürich 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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Zürich historical weather extremes in September

Based on weather observations in Zürich between 1976 and 2025, these are the recorded extremes during September.

• The warmest day in September was on September 13, 1987, with a maximum of 30°C (86°F).
• The lowest daytime temperature in September was 6°C (43°F), recorded on September 25, 2002.
• The coldest night in September in Zürich was on September 30, 1995, with a minimum of 1°C (34°F).

What to Wear in Zürich in September

For Zürich in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Zürich 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 Zürich's climate page.

More climate data for Zürich

Temperature Rainfall Sunshine Humidity Wind Speed

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