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December Weather in Keene, United States

Last updated: June 24, 2025

In December, the average temperature in Keene, United States hovers around -2°C (29°F). However, temperatures can range significantly, dipping as low as -24°C (-10°F) and soaring to a maximum of 15°C (60°F). Expect a precipitation amount of 112 mm (4.4 in) spread over 9 days, contributing to an average humidity of 81%. This weather mix creates a unique atmosphere, perfect for embracing the chill!

December Temperature in Keene

In December in Keene, the average temperature is -2°C (29°F), with maximums reaching up to 15°C (60°F) and minimums dropping as low as -24°C (-10°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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

The chart illustrates December temperature patterns in Keene, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keene, December typically has an average temperature of -2°C (29°F), with highs reaching up to 15°C (60°F) and lows dropping to around -24°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec252733455767727063523728
Data source: Temperature data for Keene 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 Keene

In Keene in December, the total precipitation amount is 112 mm (4.4 in), occurring over a span of 9 days.

December Precipitation Trends in Keene

The chart displays monthly precipitation patterns in Keene, 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 Keene, December typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec72857512381781198980135100113
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Keene

In Keene in December humidity is 81%. With an average temperature of -2°C (29°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm while traveling.

December Average Humidity in Keene

This chart illustrates the average monthly humidity levels in Keene, 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 Keene 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 Keene

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

Maximum UV Index Levels in Keene for December

The chart shows the monthly maximum UV Index (UVI) for Keene 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 Keene typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910997632
Data source: Keene 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 Keene Compares to Other Months

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

This table compares monthly weather conditions in Keene, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)72 mm (2.8 inches)86%moderate
February Weather-3°C (27°F)85 mm (3.4 inches)84%moderate
March Weather1°C (33°F)75 mm (3.0 inches)82%high
April Weather7°C (45°F)123 mm (4.8 inches)80%very high
May Weather14°C (57°F)81 mm (3.2 inches)72%very high
June Weather19°C (67°F)78 mm (3.1 inches)72%very high
July Weather22°C (72°F)119 mm (4.7 inches)67%very high
August Weather21°C (71°F)89 mm (3.5 inches)66%very high
September Weather17°C (63°F)80 mm (3.1 inches)71%high
October Weather11°C (52°F)135 mm (5.3 inches)78%high
November Weather3°C (38°F)100 mm (3.9 inches)84%moderate
December Weather-2°C (29°F)112 mm (4.4 inches)81%low

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