September weather forecast and climate
Amsterdam, Netherlands

Bicycles parked on a bridge on river Amstel in Amsterdam, Netherlands, overlooking beautiful banks and distant city buildings
Bicycles parked on a bridge on river Amstel in Amsterdam, Netherlands, overlooking beautiful banks and distant city buildings
September is the beginning of the mild autumn season, which sees an increase in precipitation in Amsterdam. The average temperatures drop to the range of 10.6°C (51.1°F) to 18.9°C (66°F) and the nights become mild to cool.
The daily sunshine lasts for approximately 4.5 hours during the 13-hour days, which is still ample time to enjoy the city. The summer heat tapers down, so a jacket adds comfort, especially during the evening breeze. The rainfall registers 83.8mm (3.3"), and at least one out of two days is wet.
September is a time when the stars align in terms of good weather and fewer crowds.

What is the temperature in September in Amsterdam?

In September, in Amsterdam, Netherlands, the average high-temperature is 18.8°C (65.8°F), and the average low-temperature is 10.6°C (51.1°F).

How many days does it rain in September in Amsterdam?

In Amsterdam, in September, it is raining for 12 days, with typically 82.4mm (3.2") of accumulated precipitation.

What is the sea temperature in September in Amsterdam?

In September, the average sea temperature 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).
Average temperature in September - Amsterdam, Netherlands
  • Average high temperature in September: 18.8°C

The warmest month (with the highest average high temperature) is August (22.1°C).
The month with the lowest average high temperature is January (5.8°C).

  • Average low temperature in September: 10.6°C

The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is February (0.5°C).

Average humidity in September - Amsterdam, Netherlands
  • Average humidity in September: 83%

The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is May (76%).

Average rainfall in September - Amsterdam, Netherlands
  • Average rainfall in September: 82.4mm

The wettest month (with the highest rainfall) is October (89.6mm).
The driest month (with the lowest rainfall) is April (40.9mm).

Average rainfall days in September - Amsterdam, Netherlands
  • Average rainfall days in September: 12 days

Months with the highest number of rainy days are October, November and December (13 days).
The month with the lowest number of rainy days is April (9 days).

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

Months with the highest number of snowfall days are January and February (6 days).
Months with the lowest number of 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).
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 shortest days is December (Average daylight: 7.8h).

  • Average sunshine in September: 4.6h

The month with most sunshine is May (Average sunshine: 7.2h).
The month with least sunshine is December (Average sunshine: 1.6h).

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

Months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 0).