Alphen aan den Rijn Weather in September

With daytime temperatures of 20°C (68°F) and nighttime lows of 12°C (54°F), September in Alphen aan den Rijn brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 87 mm (3.4 in) falls on average.

Rainfall in Alphen aan den Rijn in September

Typically around 15 days of rainfall are expected, averaging 87 mm (3.4 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Alphen aan den Rijn in September

Alphen aan den Rijn in September has perfect weather. Days reach 20°C (68°F) and nights cool to 12°C (54°F). Conditions are often most pleasant around the middle of the day. Nights cool down to 12°C (54°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 Alphen aan den Rijn in September

You can expect a moderate amount of sunlight, with approximately 144 hours. This means a pleasant mix of sun and overcast.

Wind Speed in Alphen aan den Rijn in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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For a detailed overview over the year and the best time to visit the Netherlands, check out our Alphen aan den Rijn's climate page.

Alphen aan den Rijn Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 51%  

Precipitation 87 mm (3.4 in)  

Rainy days 15 days  

Humidity 82% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 144 hours *  

Percentage Sunshine 37% *  

* Data from: Valkenburg, the Netherlands (17 KM, 10 Miles).

What to Wear in Alphen aan den Rijn in September

For Alphen aan den Rijn 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. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Alphen aan den Rijn 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 the Netherlands, check out our Alphen aan den Rijn's climate page.

More climate data for Alphen aan den Rijn

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Alphen aan den Rijn climate overview or explore weather in the Netherlands.