Amsterdam
Netherlands
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Amsterdam, Netherlands

The first month of the autumn, September, is also an enjoyable month in Amsterdam, Netherlands, with average temperature ranging between max 18.2°C (64.8°F) and min 12.5°C (54.5°F).

Temperature

In Amsterdam, the average high-temperature marginally drops, from a pleasant 21.6°C (70.9°F) in August, to a comfortable 18.2°C (64.8°F). In September, the average low-temperature is 12.5°C (54.5°F).

Humidity

In September, the average relative humidity in Amsterdam is 80%.

Rainfall

In Amsterdam, during September, the rain falls for 15.7 days and regularly aggregates up to 45mm (1.77") of precipitation. In Amsterdam, during the entire year, the rain falls for 189.3 days and collects up to 510mm (20.08") of precipitation.

Snowfall

In Amsterdam snow does not fall in April through October.

Sea temperature

In Amsterdam, the average seawater temperature is 18.1°C (64.6°F).
Note: For swimming, a surface water temperature of 18.1°C (64.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In September, the average length of the day is 12.6h.

Sunshine

In Amsterdam, the average sunshine in September is 7.1h.

UV index

In Amsterdam, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Amsterdam?

In Amsterdam, in September, the average high-temperature is 18.2°C (64.8°F), and the average low-temperature is 12.5°C (54.5°F).

What is the average humidity in September in Amsterdam?

The average relative humidity in September in Amsterdam, Netherlands, is 80%.

How many days does it rain in September in Amsterdam?

In September, in Amsterdam, the rain falls for 15.7 days. Throughout September, 45mm (1.77") of precipitation is accumulated.

When it does not snow in Amsterdam?

April through October are months without snowfall in Amsterdam, Netherlands.

How cold is the water in September in Amsterdam?

In Amsterdam, the average seawater temperature in September is 18.1°C (64.6°F). Swimming in 18.1°C (64.6°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the average length of the day in September in Amsterdam?

In Amsterdam, Netherlands, the average length of the day in September is 12.6h.

How long on average sun shines in September in Amsterdam?

The average sunshine in September in Amsterdam is 7.1h.

How high is the UV index in September in Amsterdam?

In Amsterdam, Netherlands, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in September - Amsterdam, Netherlands
  • Average high temperature in September: 18.2°C

The warmest month (with the highest average high temperature) is August (21.6°C).
The month with the lowest average high temperature is January (5.3°C).

  • Average low temperature in September: 12.5°C

The month with the highest average low temperature is August (15°C).
The coldest month (with the lowest average low temperature) is February (2°C).

Average humidity in September - Amsterdam, Netherlands
  • Average humidity in September: 80%

The month with the highest relative humidity is December (86%).
The month with the lowest relative humidity is April (75%).

Average rainfall in September - Amsterdam, Netherlands
  • Average rainfall in September: 45mm

The wettest month (with the highest rainfall) is August (55mm).
The driest month (with the least rainfall) is April (18mm).

Average rainfall days in September - Amsterdam, Netherlands
  • Average rainfall days in September: 15.7 days

The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is April (12.2 days).

Average snowfall in September - Amsterdam, Netherlands
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (22mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in September - Amsterdam, Netherlands
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.8 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September - Amsterdam, Netherlands
  • Average sea temperature in September: 18.1°C

The best month for swimming (with the highest average sea temperature) is August (18.3°C).
The coldest months (with the lowest average sea temperature) are January and February (6.4°C).

Average daylight in September / Average sunshine in September - Amsterdam, Netherlands
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.7h).
The month with the shortest days is December (Average daylight: 7.8h).

  • Average sunshine in September: 7.1h

Months with the most sunshine are June and July (Average sunshine: 9.7h).
The month with the least sunshine is December (Average sunshine: 3.5h).

Average UV index in September - Amsterdam, Netherlands
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 2).