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December Weather in New Fairfield, United States

Last updated: June 24, 2025

In December, the average temperature in New Fairfield, United States hovers around 1°C (34°F), with fluctuations that can bring the minimum down to -15°C (5°F) and a maximum of 16°C (61°F). Expect 115 mm (4.5 in) of precipitation spread over 11 days, and a notable average humidity of 80%, making it a month to prepare for varying weather conditions!

December Temperature in New Fairfield

In December in New Fairfield, the average temperature is 1°C (34°F). Maximums can reach 16°C (61°F), and minimums can drop as low as -15°C (5°F). Be prepared for a wide range of temperatures and pack accordingly if you plan to travel during this time.

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

The chart illustrates December temperature patterns in New Fairfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Fairfield, December typically has an average temperature of 1°C (34°F), with highs reaching up to 16°C (61°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec303338495969747366564234
Data source: Temperature data for New 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 New Fairfield

In New Fairfield in December, the total precipitation amount is 115 mm (4.5 in) spread over 11 days.

December Precipitation Trends in New Fairfield

The chart displays monthly precipitation patterns in New 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 New Fairfield, December typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec71978912411510214511912214793115
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in New Fairfield

In New Fairfield in December, humidity is 80%. With an average temperature of 1°C (34°F), this humidity feels like a damp chill that seeps through your layers, making outdoor activities uncomfortable and potentially discouraging for travelers.

December Average Humidity in New Fairfield

This chart illustrates the average monthly humidity levels in New 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 New Fairfield is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in New Fairfield

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

Maximum UV Index Levels in New Fairfield for December

The chart shows the monthly maximum UV Index (UVI) for New 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 New Fairfield typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: New 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 New Fairfield Compares to Other Months

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

This table compares monthly weather conditions in New Fairfield, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)71 mm (2.8 inches)84%moderate
February Weather0°C (33°F)97 mm (3.8 inches)82%moderate
March Weather3°C (38°F)89 mm (3.5 inches)81%high
April Weather9°C (49°F)124 mm (4.9 inches)78%very high
May Weather15°C (59°F)115 mm (4.5 inches)69%very high
June Weather20°C (69°F)102 mm (4.0 inches)69%very high
July Weather24°C (75°F)145 mm (5.7 inches)62%very high
August Weather23°C (73°F)119 mm (4.7 inches)65%very high
September Weather19°C (66°F)122 mm (4.8 inches)68%very high
October Weather13°C (56°F)147 mm (5.8 inches)74%high
November Weather6°C (42°F)93 mm (3.7 inches)82%moderate
December Weather1°C (34°F)115 mm (4.5 inches)80%low

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