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September Weather in Hollum, Netherlands

Last updated: August 27, 2025

In Hollum, Netherlands, the average temperature in September hovers around 16°C (61°F). During this time, temperatures can dip to a comfortable 12°C (53°F) and soar to a pleasant 23°C (74°F). Expect about 99 mm (3.9 in) of precipitation spread across 13 days, contributing to an average humidity of 83%.

September Temperature in Hollum

In September in Hollum, the average temperature is 16°C (61°F). The maximum can reach 23°C (74°F), and the minimum can be as low as 12°C (53°F). This mild climate makes Hollum an ideal destination for travelers seeking comfortable weather.

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

The chart illustrates September temperature patterns in Hollum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hollum, September typically has an average temperature of 16°C (61°F), with highs reaching up to 23°C (74°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec424143465360636561564844
Data source: Temperature data for Hollum 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 Hollum

In Hollum in September, the precipitation amount is 99 mm (3.9 in) over the course of 13 days.

September Precipitation Trends in Hollum

The chart displays monthly precipitation patterns in Hollum, 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 Hollum, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec777169355476851259912376104
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hollum

In Hollum in September, humidity is 83%. With an average temperature of 16°C (61°F), this humidity feels like a warm, muggy blanket wrapping around you, making travel a bit sticky and potentially uncomfortable as you navigate through the sights.

September Average Humidity in Hollum

This chart illustrates the average monthly humidity levels in Hollum, 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 Hollum is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%86%84%80%75%75%75%83%86%87%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hollum

In Hollum 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 Hollum.

Maximum UV Index Levels in Hollum for September

The chart shows the monthly maximum UV Index (UVI) for Hollum 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 Hollum typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123577775321
Data source: Hollum 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 Hollum Compares to Other Months

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

This table compares monthly weather conditions in Hollum, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)77 mm (3.0 inches)88%low
February Weather5°C (41°F)71 mm (2.8 inches)88%low
March Weather6°C (43°F)69 mm (2.7 inches)86%moderate
April Weather8°C (47°F)35 mm (1.4 inches)84%moderate
May Weather11°C (53°F)54 mm (2.1 inches)80%high
June Weather16°C (60°F)76 mm (3.0 inches)75%high
July Weather17°C (63°F)85 mm (3.3 inches)75%high
August Weather18°C (65°F)125 mm (4.9 inches)75%high
September Weather16°C (61°F)99 mm (3.9 inches)83%moderate
October Weather13°C (56°F)122 mm (4.8 inches)86%moderate
November Weather9°C (49°F)76 mm (3.0 inches)87%low
December Weather7°C (44°F)104 mm (4.1 inches)86%low

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