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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 3°C (38°F). This chilly month can bring extremes, with minimums plummeting to -14°C (8°F) and maximums reaching up to 17°C (62°F). Expect about 129 mm (5.1 in) of precipitation over 10 days, accompanied by an average humidity of 80%. Stay warm and dry!

December Temperature in Exeter

In December in Exeter, the average temperature is 3°C (38°F). Maximums can reach 17°C (62°F), while minimums can drop as low as -14°C (8°F). Be prepared for a wide range of temperatures when planning your trip!

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 3°C (38°F), with highs reaching up to 17°C (62°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec343539485766737367594638
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 precipitation amount is 129 mm (5.1 in) over a span 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 129 mm (5.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec80103107130116971149497144105129
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 80%. With an average temperature of 3°C (38°F), this humidity feels like a chilly dampness that clings to your skin, making traveling uncomfortable and forcing you to bundle up just to step outside.

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 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 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.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
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 Weather1°C (34°F)80 mm (3.1 inches)84%moderate
February Weather2°C (35°F)103 mm (4.0 inches)84%moderate
March Weather4°C (39°F)107 mm (4.2 inches)82%high
April Weather9°C (48°F)130 mm (5.1 inches)79%very high
May Weather14°C (57°F)116 mm (4.6 inches)75%very high
June Weather19°C (67°F)97 mm (3.8 inches)78%very high
July Weather23°C (73°F)114 mm (4.5 inches)76%very high
August Weather23°C (73°F)94 mm (3.7 inches)76%very high
September Weather20°C (67°F)97 mm (3.8 inches)75%very high
October Weather15°C (59°F)144 mm (5.7 inches)75%high
November Weather8°C (47°F)105 mm (4.1 inches)80%moderate
December Weather3°C (38°F)129 mm (5.1 inches)80%low

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