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December Weather in Castricum, Netherlands

Last updated: August 27, 2025

In December, the average temperature in Castricum, Netherlands hovers around 6°C (44°F). Expect chilly nights with minimums dipping to -3°C (27°F), while daytime highs can reach a more comfortable 13°C (55°F). Prepare for some damp days, as 105 mm (4.1 in) of precipitation typically falls over 18 days, contributing to an average humidity level of a high 86%.

December Temperature in Castricum

In December in Castricum, the average temperature is 6°C (44°F). Maximum temperatures can reach 13°C (55°F), while minimum temperatures can drop as low as -3°C (27°F). It's advisable to pack layers and prepare for varying weather conditions when traveling during this month.

December Weather in Castricum: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Castricum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castricum, December typically has an average temperature of 6°C (44°F), with highs reaching up to 13°C (55°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec414144485462646560554743
Data source: Temperature data for Castricum 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.

December Precipitation in Castricum

In Castricum in December, the total precipitation amount is 105 mm (4.1 in) over a span of 18 days.

December Precipitation Trends in Castricum

The chart displays monthly precipitation patterns in Castricum, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Castricum, December typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec62717143547473999311565105
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castricum

In Castricum in December, humidity is 86%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities quite uncomfortable for traveling.

December Average Humidity in Castricum

This chart illustrates the average monthly humidity levels in Castricum, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Castricum is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%85%84%82%80%78%83%86%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castricum

In Castricum in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Castricum.

Maximum UV Index Levels in Castricum for December

The chart shows the monthly maximum UV Index (UVI) for Castricum in December, 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 December, the maximum UV index in Castricum typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Castricum December 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 December Weather in Castricum Compares to Other Months

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

This table compares monthly weather conditions in Castricum, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)62 mm (2.4 inches)87%low
February Weather5°C (42°F)71 mm (2.8 inches)87%low
March Weather7°C (44°F)71 mm (2.8 inches)86%moderate
April Weather9°C (49°F)43 mm (1.7 inches)85%moderate
May Weather12°C (55°F)54 mm (2.1 inches)84%high
June Weather17°C (62°F)74 mm (2.9 inches)81%very high
July Weather18°C (64°F)73 mm (2.9 inches)80%very high
August Weather18°C (65°F)99 mm (3.9 inches)78%high
September Weather16°C (60°F)93 mm (3.7 inches)83%moderate
October Weather13°C (55°F)115 mm (4.5 inches)86%moderate
November Weather9°C (48°F)65 mm (2.6 inches)87%low
December Weather6°C (44°F)105 mm (4.1 inches)86%low

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