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December Weather in Exeter, United States

Last updated: June 24, 2025

In December, the average temperature in Exeter, United States is a cool 6°C (42°F). Expect significant variability, with minimums dipping to -12°C (11°F) and maximums peaking at 24°C (75°F). Rainfall averages around 61 mm (2.4 in) over the course of 7 days, contributing to a high average humidity of 87%. Prepare for a mix of brisk days and damp conditions!

December Temperature in Exeter

In December in Exeter, the average temperature is 6°C (42°F). Maximums can reach 24°C (75°F) and minimums can be as low as -12°C (11°F). This range makes Exeter an ideal destination for travelers looking to experience a variety of seasonal 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 6°C (42°F), with highs reaching up to 24°C (75°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec363950566675797673594742
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 61 mm (2.4 in) over the course of 7 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 61 mm (2.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec929515917417210493120561617061
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 87%. With an average temperature of 6°C (42°F), this humidity feels like a persistent chill that seeps into your bones, making it uncomfortable for traveling and leaving you longing for warmth at every turn.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
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 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Exeter, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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 Weather2°C (36°F)91 mm (3.6 inches)81%moderate
February Weather4°C (39°F)95 mm (3.7 inches)78%high
March Weather10°C (50°F)159 mm (6.3 inches)76%high
April Weather13°C (56°F)174 mm (6.8 inches)78%very high
May Weather19°C (66°F)172 mm (6.8 inches)83%very high
June Weather24°C (76°F)104 mm (4.1 inches)83%extreme
July Weather26°C (79°F)93 mm (3.7 inches)78%extreme
August Weather25°C (77°F)120 mm (4.7 inches)68%very high
September Weather23°C (73°F)56 mm (2.2 inches)64%very high
October Weather15°C (59°F)161 mm (6.3 inches)70%high
November Weather8°C (47°F)70 mm (2.7 inches)83%moderate
December Weather6°C (42°F)61 mm (2.4 inches)87%moderate

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