Illmensee Weather in September

With daytime temperatures of 20°C (68°F) and nighttime lows of 11°C (52°F), September in Illmensee brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 98 mm (3.9 in) falls on average.

Rainfall in Illmensee in September

On average, there are about 13 days with rain during this month, averaging 98 mm (3.9 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 Illmensee in September

The perfect temperature in Illmensee in September makes it a solid month to visit, with 20°C (68°F) during the day and 11°C (52°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. 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 Illmensee in September

You can expect a moderate amount of sunlight, with approximately 155 hours. This means a pleasant mix of sun and overcast.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. September typically offers the best weather for Illmensee.

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

Illmensee Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 42%  

Precipitation 98 mm (3.9 in)  

Rainy days 13 days  

Humidity 78% *  

Sunshine 155 hours *  

Percentage Sunshine 44% *  

* Data from: St. Gallen, Switzerland (48 KM, 30 Miles).

What to Wear in Illmensee in September

For Illmensee 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. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Illmensee 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

8/10

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 Germany, check out our Illmensee's climate page.

More climate data for Illmensee

Temperature Rainfall Sunshine Humidity

See the full Illmensee climate overview or explore weather in Germany.