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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 3°C (37°F). During this month, temperatures can range from a frigid -16°C (4°F) to a surprisingly warm 24°C (76°F). Expect about 18 mm (0.7 in) of precipitation over 2 days, contributing to an average humidity level of 83%. Prepare for varied weather and make the most of your visit!

December Temperature in Deerfield

In December in Deerfield, the average temperature is 3°C (37°F). The maximum can reach 24°C (76°F), while the minimum can drop as low as -16°C (4°F). Travelers should be prepared for a wide range of temperatures during this month.

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 3°C (37°F), with highs reaching up to 24°C (76°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec333446536376797671554537
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 precipitation amount is 18 mm (0.7 in) over the course of 2 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 18 mm (0.7 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec1617474111250466742391018
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 83%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and encouraging travelers to seek indoor attractions or cozy cafes.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%77%65%67%81%82%82%84%79%75%79%83%
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 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 Deerfield, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec45710111212119753
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 Weather1°C (33°F)16 mm (0.6 inches)74%moderate
February Weather1°C (34°F)17 mm (0.7 inches)77%moderate
March Weather8°C (46°F)47 mm (1.9 inches)65%high
April Weather12°C (54°F)41 mm (1.6 inches)67%very high
May Weather17°C (63°F)112 mm (4.4 inches)81%extreme
June Weather24°C (76°F)50 mm (2.0 inches)82%extreme
July Weather26°C (79°F)46 mm (1.8 inches)82%extreme
August Weather25°C (77°F)67 mm (2.6 inches)84%extreme
September Weather22°C (71°F)42 mm (1.7 inches)79%very high
October Weather13°C (55°F)39 mm (1.6 inches)75%high
November Weather7°C (45°F)10 mm (0.4 inches)79%moderate
December Weather3°C (37°F)18 mm (0.7 inches)83%moderate

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