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December Weather in Head of Westport, United States

Last updated: June 24, 2025

In December, the average temperature in Head of Westport, United States hovers around 4°C (40°F). Though the mercury can dip as low as -12°C (10°F), it might rise to a comfortable 16°C (61°F) on warmer days. Expect 134 mm (5.3 in) of precipitation spread over about 10 days, contributing to an average humidity level of 80%. Be prepared for a mix of chilly and damp weather!

December Temperature in Head of Westport

In December in Head of Westport, the average temperature is 4°C (40°F). Maximums can reach 16°C (61°F), while minimums can drop as low as -12°C (10°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

December Weather in Head of Westport: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Head of Westport, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Head of Westport, December typically has an average temperature of 4°C (40°F), with highs reaching up to 16°C (61°F) and lows dropping to around -12°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec353638465463717267604839
Data source: Temperature data for Head of Westport 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 Head of Westport

In Head of Westport in December, the total precipitation amount reaches 134 mm (5.3 in) over a span of 10 days.

December Precipitation Trends in Head of Westport

The chart displays monthly precipitation patterns in Head of Westport, 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 Head of Westport, December typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec93114117137123989585108160106134
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Head of Westport

In Head of Westport in December, humidity is 80%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring careful planning for warmth and moisture management.

December Average Humidity in Head of Westport

This chart illustrates the average monthly humidity levels in Head of Westport, 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 Head of Westport is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Head of Westport

In Head of Westport in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Head of Westport, you can visit Hourly UV Index in Head of Westport.

Maximum UV Index Levels in Head of Westport for December

The chart shows the monthly maximum UV Index (UVI) for Head of Westport 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 Head of Westport typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
Data source: Head of Westport 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 Head of Westport Compares to Other Months

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

This table compares monthly weather conditions in Head of Westport, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)93 mm (3.7 inches)84%moderate
February Weather2°C (36°F)113 mm (4.5 inches)84%moderate
March Weather3°C (38°F)117 mm (4.6 inches)82%high
April Weather8°C (46°F)137 mm (5.4 inches)79%very high
May Weather12°C (54°F)123 mm (4.8 inches)75%very high
June Weather17°C (64°F)98 mm (3.9 inches)78%very high
July Weather22°C (71°F)94 mm (3.7 inches)76%very high
August Weather22°C (72°F)85 mm (3.4 inches)76%very high
September Weather19°C (67°F)108 mm (4.2 inches)75%very high
October Weather15°C (60°F)160 mm (6.3 inches)75%high
November Weather9°C (49°F)106 mm (4.2 inches)80%moderate
December Weather4°C (40°F)134 mm (5.3 inches)80%low

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