Romanshorn Weather in September

September in Romanshorn averages 19°C (66°F) during the day and 11°C (52°F) at night. Quite a bit of rainfall is typical this month, with around 125 mm (4.9 in) on average. An umbrella is a good idea.

Rainfall in Romanshorn in September

Historically, approximately 12 days this month are expected to have rain, averaging 125 mm (4.9 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Romanshorn in September

If you're visiting Romanshorn in September, expect highs of 19°C (66°F) and overnight lows around 11°C (52°F). 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 Romanshorn in September

With about 155 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If you prefer enjoying temperate temperatures and rain-free days, June, July and August typically offer the best 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 Romanshorn's climate page.

Romanshorn Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 41%  

Precipitation 125 mm (4.9 in)  

Rainy days 12 days  

Humidity 78% *  

Sunshine 155 hours *  

Percentage Sunshine 44% *  

* Data from: St. Gallen, Switzerland (15 KM, 9 Miles).

What to Wear in Romanshorn in September

For Romanshorn 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 Romanshorn 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 Romanshorn's climate page.

More climate data for Romanshorn

Temperature Rainfall Sunshine Humidity

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