Saint-Germain-en-Laye Weather in September

With daytime temperatures of 22°C (72°F) and nighttime lows of 11°C (52°F), September in Saint-Germain-en-Laye brings pleasant temperatures during the day. It is also the driest month of the year, with minimal rainfall.

Rainfall in Saint-Germain-en-Laye in September

As the driest month, it's a great time for hiking and exploring the area. You can typically expect 12 days of rain this month, averaging around 52 mm (2 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Saint-Germain-en-Laye in September

September is one of the better months to visit Saint-Germain-en-Laye. Expect 22°C (72°F) during the day and 11°C (52°F) at night. Conditions are often most pleasant around the middle 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 Saint-Germain-en-Laye in September

You can expect a moderate amount of sunlight, with approximately 172 hours. This means a pleasant mix of sun and overcast.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Saint-Germain-en-Laye.

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For a detailed overview over the year and the best time to visit France, check out our Saint-Germain-en-Laye's climate page.

Saint-Germain-en-Laye Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 22°C (72°F)  

Chance of Rain 40%  

Precipitation 52 mm (2 in)  

Rainy days 12 days  

Humidity 77% *  

Sunshine 172 hours *  

Percentage Sunshine 44% *  

* Data from: Paris, France (27 KM, 16 Miles).

What to Wear in Saint-Germain-en-Laye in September

For Saint-Germain-en-Laye 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. Rain is likely on several days, so bring a good rain jacket. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Saint-Germain-en-Laye in September

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

Swimming

6/10

Cycling

10/10

Walking

10/10

Camping

8/10

Outdoor sports

10/10

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 France, check out our Saint-Germain-en-Laye's climate page.

More climate data for Saint-Germain-en-Laye

Temperature Rainfall Sunshine Humidity

See the full Saint-Germain-en-Laye climate overview or explore weather in France.