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December Weather in Fort Fairfield, United States

Last updated: June 24, 2025

In December, the average temperature in Fort Fairfield, United States hovers around -7°C (20°F). Be prepared for chilly extremes, as temperatures can plummet to a brisk -26°C (-15°F) or climb to a surprisingly warm 15°C (58°F). Expect about 104 mm (4.1 in) of precipitation spread across 11 days, and immerse yourself in the frosty ambiance with an average humidity of 90%.

December Temperature in Fort Fairfield

In December in Fort Fairfield, the average temperature is -7°C (20°F). Maximum temperatures can reach 15°C (58°F), while minimums can drop as low as -26°C (-15°F). It’s advisable to pack warm clothing and plan indoor activities during your visit.

December Weather in Fort Fairfield: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Fort Fairfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Fairfield, December typically has an average temperature of -7°C (20°F), with highs reaching up to 15°C (58°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec141625385161666556453119
Data source: Temperature data for Fort Fairfield 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 Fort Fairfield

In Fort Fairfield in December, the precipitation amount is 104 mm (4.1 in) over the course of 11 days.

December Precipitation Trends in Fort Fairfield

The chart displays monthly precipitation patterns in Fort Fairfield, 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 Fort Fairfield, December typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9377761111079210089111113118104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Fort Fairfield

In Fort Fairfield in December, humidity is 90%. With an average temperature of -7°C (20°F), this humidity feels like an oppressive chill that seeps into your bones, making travel uncomfortable and your breath visible in the frosty air.

December Average Humidity in Fort Fairfield

This chart illustrates the average monthly humidity levels in Fort Fairfield, 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 Fort Fairfield is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%90%87%82%77%82%83%85%87%88%90%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Fort Fairfield

In Fort Fairfield 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 Fort Fairfield, you can visit Hourly UV Index in Fort Fairfield.

Maximum UV Index Levels in Fort Fairfield for December

The chart shows the monthly maximum UV Index (UVI) for Fort Fairfield 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 Fort Fairfield typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357810887532
Data source: Fort Fairfield 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 Fort Fairfield Compares to Other Months

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

This table compares monthly weather conditions in Fort Fairfield, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)93 mm (3.7 inches)93%low
February Weather-9°C (16°F)77 mm (3.0 inches)92%moderate
March Weather-4°C (25°F)76 mm (3.0 inches)90%moderate
April Weather3°C (38°F)111 mm (4.4 inches)87%high
May Weather10°C (51°F)107 mm (4.2 inches)82%very high
June Weather16°C (61°F)92 mm (3.6 inches)77%very high
July Weather19°C (66°F)100 mm (3.9 inches)81%very high
August Weather18°C (65°F)88 mm (3.5 inches)83%very high
September Weather14°C (57°F)111 mm (4.4 inches)85%high
October Weather7°C (45°F)113 mm (4.5 inches)87%moderate
November Weather0°C (32°F)118 mm (4.6 inches)87%moderate
December Weather-7°C (20°F)104 mm (4.1 inches)90%low

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