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December Weather in Deerfield, United States

Last updated: June 24, 2025

In December, the average temperature in Deerfield, United States hovers around -1°C (30°F). While it can dip as low as -22°C (-7°F), temperatures can surprisingly climb to a maximum of 18°C (65°F). Expect 47 mm (1.9 in) of precipitation over approximately 7 days, contributing to an average humidity level of 81%.

December Temperature in Deerfield

In December in Deerfield, the average temperature is -1°C (30°F), with maximums reaching 18°C (65°F) and minimums dropping as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates December temperature patterns in Deerfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deerfield, December typically has an average temperature of -1°C (30°F), with highs reaching up to 18°C (65°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec222336465970757265523730
Data source: Temperature data for Deerfield 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 Deerfield

In Deerfield in December, the total precipitation amount is 47 mm (1.9 in) recorded over a span of 7 days.

December Precipitation Trends in Deerfield

The chart displays monthly precipitation patterns in Deerfield, 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 Deerfield, December typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec54525810112711692971091144348
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Deerfield

In Deerfield in December, humidity is 81%. With an average temperature of -1°C (30°F), this humidity feels like an extra layer of chill settles in, making travel uncomfortable and the cold air cling to your skin, dampening the experience with every breath.

December Average Humidity in Deerfield

This chart illustrates the average monthly humidity levels in Deerfield, 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 Deerfield is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Deerfield

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

Maximum UV Index Levels in Deerfield for December

The chart shows the monthly maximum UV Index (UVI) for Deerfield 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 Deerfield typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101098532
Data source: Deerfield 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 Deerfield Compares to Other Months

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

This table compares monthly weather conditions in Deerfield, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)54 mm (2.1 inches)85%moderate
February Weather-5°C (23°F)52 mm (2.0 inches)85%moderate
March Weather2°C (36°F)58 mm (2.3 inches)85%moderate
April Weather8°C (46°F)101 mm (4.0 inches)85%very high
May Weather15°C (60°F)127 mm (5.0 inches)78%very high
June Weather21°C (71°F)116 mm (4.6 inches)80%very high
July Weather24°C (75°F)92 mm (3.6 inches)78%very high
August Weather22°C (72°F)97 mm (3.8 inches)76%very high
September Weather18°C (65°F)109 mm (4.3 inches)79%very high
October Weather11°C (52°F)114 mm (4.5 inches)83%moderate
November Weather3°C (37°F)43 mm (1.7 inches)88%moderate
December Weather-1°C (30°F)47 mm (1.9 inches)81%low

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