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December Weather in Exeter, United States

Last updated: June 24, 2025

In Exeter, United States, the average temperature in December hovers around 0°C (32°F). Expect minimums of -21°C (-6°F) and maximums reaching 16°C (61°F). During this time, the region experiences 126 mm (5.0 in) of precipitation spread over about 10 days, contributing to an average humidity of 81%. Stay prepared and embrace the chilly atmosphere!

December Temperature in Exeter

In December in Exeter, the average temperature is 0°C (32°F). Maximums can reach 16°C (61°F), and minimums can be as low as -21°C (-6°F). This varied climate makes Exeter a unique destination for travelers seeking both winter sports and milder outdoor activities.

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

The chart illustrates December temperature patterns in Exeter, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Exeter, December typically has an average temperature of 0°C (32°F), with highs reaching up to 16°C (61°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec283036475768737266554132
Data source: Temperature data for Exeter 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 Exeter

In Exeter in December, the total precipitation amount is 126 mm (5.0 in) spread over a duration of 10 days.

December Precipitation Trends in Exeter

The chart displays monthly precipitation patterns in Exeter, 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 Exeter, December typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec72908613178911357873131102126
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Exeter

In Exeter in December, humidity is 81%. With an average temperature of 0°C (32°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm and dry while traveling.

December Average Humidity in Exeter

This chart illustrates the average monthly humidity levels in Exeter, 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 Exeter is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Exeter

In Exeter 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 Exeter, you can visit Hourly UV Index in Exeter.

Maximum UV Index Levels in Exeter for December

The chart shows the monthly maximum UV Index (UVI) for Exeter 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 Exeter typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3458910997532
Data source: Exeter 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 Exeter Compares to Other Months

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

This table compares monthly weather conditions in Exeter, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)72 mm (2.8 inches)86%moderate
February Weather-1°C (31°F)90 mm (3.5 inches)84%moderate
March Weather2°C (36°F)86 mm (3.4 inches)82%moderate
April Weather8°C (47°F)131 mm (5.2 inches)80%very high
May Weather14°C (58°F)78 mm (3.1 inches)72%very high
June Weather20°C (68°F)91 mm (3.6 inches)72%very high
July Weather23°C (73°F)135 mm (5.3 inches)67%very high
August Weather22°C (73°F)78 mm (3.1 inches)66%very high
September Weather19°C (66°F)73 mm (2.9 inches)71%high
October Weather13°C (55°F)131 mm (5.2 inches)78%moderate
November Weather5°C (41°F)102 mm (4.0 inches)84%moderate
December Weather0°C (32°F)126 mm (5.0 inches)81%low

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