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December Weather in Newhaven, United Kingdom

Last updated: August 27, 2025

In December, the average temperature in Newhaven, United Kingdom hovers around 9°C (48°F), with temperatures ranging from a chilly 2°C (35°F) to a mild 13°C (56°F). This month sees 149 mm (5.9 in) of precipitation spread over 18 days, contributing to an average humidity of 92%. Be prepared for wet and cool conditions!

December Temperature in Newhaven

In December in Newhaven, the average temperature is 9°C (48°F). Maximums can reach 13°C (56°F), while minimums can drop to as low as 2°C (35°F). It's advisable to pack layers to stay comfortable while exploring.

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

The chart illustrates December temperature patterns in Newhaven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newhaven, December typically has an average temperature of 9°C (48°F), with highs reaching up to 13°C (56°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec454546485359636461575148
Data source: Temperature data for Newhaven 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 Newhaven

In Newhaven in December, the total precipitation amount is 149 mm (5.9 in) spread over 18 days.

December Precipitation Trends in Newhaven

The chart displays monthly precipitation patterns in Newhaven, 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 Newhaven, December typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec798369304865517467133119149
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Newhaven

In Newhaven in December humidity is 92%. With an average temperature of 9°C (48°F), this humidity feels like a heavy blanket enveloping you, making outdoor exploration quite challenging due to the stickiness in the air and the constant dampness that clings to your skin.

December Average Humidity in Newhaven

This chart illustrates the average monthly humidity levels in Newhaven, 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 Newhaven is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%82%81%76%73%80%89%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Newhaven

In Newhaven 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 Newhaven.

Maximum UV Index Levels in Newhaven for December

The chart shows the monthly maximum UV Index (UVI) for Newhaven 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 Newhaven typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224678876421
Data source: Newhaven 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 Newhaven Compares to Other Months

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

This table compares monthly weather conditions in Newhaven, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)79 mm (3.1 inches)91%low
February Weather7°C (45°F)83 mm (3.3 inches)89%low
March Weather8°C (47°F)69 mm (2.7 inches)86%moderate
April Weather9°C (49°F)30 mm (1.2 inches)85%high
May Weather12°C (54°F)48 mm (1.9 inches)82%high
June Weather15°C (59°F)65 mm (2.6 inches)81%very high
July Weather17°C (63°F)51 mm (2.0 inches)76%very high
August Weather18°C (64°F)74 mm (2.9 inches)73%high
September Weather16°C (62°F)67 mm (2.6 inches)80%high
October Weather14°C (58°F)133 mm (5.2 inches)89%moderate
November Weather11°C (51°F)119 mm (4.7 inches)92%low
December Weather9°C (48°F)149 mm (5.9 inches)92%low

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