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September Weather in Amsterdam, United States

Last updated: June 24, 2025

In Amsterdam, United States, the average temperature in September hovers around 20°C (69°F), but be prepared for a range that can dip to a cool 5°C (41°F) and soar up to a warm 35°C (94°F). Expect approximately 100 mm (3.9 in) of precipitation spread over 9 days, contributing to an average humidity level of 73%. Be ready for a delightful mix of weather!

September Temperature in Amsterdam

In September in Amsterdam, the average temperature is 20°C (69°F). Maximum can reach 35°C (94°F) and minimum can be as low as 5°C (41°F). Be prepared for a wide range of temperatures, making it ideal for packing layers for your travels.

September Weather in Amsterdam: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Amsterdam, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Amsterdam, September typically has an average temperature of 20°C (69°F), with highs reaching up to 35°C (94°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec313443526472767368574236
Data source: Temperature data for Amsterdam generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Amsterdam

In Amsterdam in September, the precipitation amount is 100 mm (3.9 in) spread over 9 days.

September Precipitation Trends in Amsterdam

The chart displays monthly precipitation patterns in Amsterdam, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Amsterdam, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9011411712913916212797100106100108
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Amsterdam

In Amsterdam in September humidity is 73%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel slightly sticky but ultimately comfortable as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Amsterdam

This chart illustrates the average monthly humidity levels in Amsterdam, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Amsterdam is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Amsterdam

In Amsterdam in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Amsterdam.

Maximum UV Index Levels in Amsterdam for September

The chart shows the monthly maximum UV Index (UVI) for Amsterdam in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Amsterdam typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Amsterdam September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Amsterdam Compares to Other Months

Weather in Amsterdam varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Amsterdam, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Amsterdam, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)90 mm (3.5 inches)88%moderate
February Weather1°C (35°F)114 mm (4.5 inches)88%moderate
March Weather6°C (43°F)117 mm (4.6 inches)87%high
April Weather11°C (52°F)129 mm (5.1 inches)85%very high
May Weather18°C (64°F)139 mm (5.5 inches)81%very high
June Weather22°C (72°F)162 mm (6.4 inches)82%very high
July Weather24°C (76°F)127 mm (5.0 inches)81%very high
August Weather23°C (73°F)97 mm (3.8 inches)73%very high
September Weather20°C (69°F)100 mm (3.9 inches)73%very high
October Weather14°C (58°F)106 mm (4.2 inches)78%high
November Weather6°C (42°F)100 mm (3.9 inches)89%moderate
December Weather2°C (37°F)108 mm (4.3 inches)87%moderate

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