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September Weather in Numansdorp, Netherlands

Last updated: August 27, 2025

In September, the average temperature in Numansdorp, Netherlands hovers around 15°C (60°F), with pleasant days that can see highs of 31°C (89°F) and cooler nights dipping to 3°C (38°F). Expect about 66 mm (2.6 in) of precipitation spread over 11 days, contributing to an average humidity level of 82%—perfect for those who enjoy a vibrant, lush environment.

September Temperature in Numansdorp

In September in Numansdorp, the average temperature is 15°C (60°F). Maximums can reach 31°C (89°F) and minimums can be as low as 3°C (38°F). Overall, it's a great time to explore Numansdorp, but be prepared for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Numansdorp, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Numansdorp, September typically has an average temperature of 15°C (60°F), with highs reaching up to 31°C (89°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec404145505664656559544642
Data source: Temperature data for Numansdorp 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 Numansdorp

In Numansdorp in September, the precipitation amount is 66 mm (2.6 in) spread over 11 days.

September Precipitation Trends in Numansdorp

The chart displays monthly precipitation patterns in Numansdorp, 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 Numansdorp, September typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec596570436673778566895592
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Numansdorp

In Numansdorp in September humidity is 82%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and draining, which can hinder your travel experience.

September Average Humidity in Numansdorp

This chart illustrates the average monthly humidity levels in Numansdorp, 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 Numansdorp is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%85%82%82%80%76%82%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Numansdorp

In Numansdorp in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Numansdorp.

Maximum UV Index Levels in Numansdorp for September

The chart shows the monthly maximum UV Index (UVI) for Numansdorp 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 Numansdorp typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Numansdorp 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 Numansdorp Compares to Other Months

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

This table compares monthly weather conditions in Numansdorp, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (40°F)59 mm (2.3 inches)91%low
February Weather5°C (42°F)65 mm (2.6 inches)89%low
March Weather7°C (45°F)70 mm (2.8 inches)87%moderate
April Weather10°C (50°F)43 mm (1.7 inches)85%moderate
May Weather13°C (56°F)66 mm (2.6 inches)82%high
June Weather18°C (64°F)73 mm (2.9 inches)82%very high
July Weather18°C (66°F)77 mm (3.0 inches)80%very high
August Weather19°C (66°F)85 mm (3.3 inches)76%high
September Weather15°C (60°F)66 mm (2.6 inches)82%moderate
October Weather12°C (54°F)89 mm (3.5 inches)89%moderate
November Weather8°C (46°F)55 mm (2.2 inches)92%low
December Weather6°C (43°F)92 mm (3.6 inches)92%low

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