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December Weather in Greenfield, United States

Last updated: June 24, 2025

In December, the average temperature in Greenfield, United States hovers around 2°C (36°F). Be prepared for a range of conditions, as temperatures can dip to a brisk -20°C (-3°F) or reach a pleasant 18°C (65°F). Expect 86 mm (3.4 in) of precipitation over approximately 10 days, and keep in mind the high average humidity of 87%, which can make the air feel quite chilly.

December Temperature in Greenfield

In December in Greenfield, the average temperature is 2°C (36°F). Maximums can reach 18°C (65°F), while minimums can drop as low as -20°C (-3°F). This makes it essential for travelers to pack accordingly, as they may experience a wide range of temperatures during their visit.

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

The chart illustrates December temperature patterns in Greenfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenfield, December typically has an average temperature of 2°C (36°F), with highs reaching up to 18°C (65°F) and lows dropping to around -20°C (-3°F).
JanFebMarAprMayJunJulAugSepOctNovDec303443526473767470584236
Data source: Temperature data for Greenfield 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 Greenfield

In Greenfield in December, the precipitation amount is 86 mm (3.4 in) over the course of 10 days.

December Precipitation Trends in Greenfield

The chart displays monthly precipitation patterns in Greenfield, 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 Greenfield, December typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec8310013410213610511292881029887
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Greenfield

In Greenfield in December, humidity is 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.

December Average Humidity in Greenfield

This chart illustrates the average monthly humidity levels in Greenfield, 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 Greenfield is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Greenfield

In Greenfield 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 Greenfield, you can check the information here.

Maximum UV Index Levels in Greenfield for December

The chart shows the monthly maximum UV Index (UVI) for Greenfield 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 Greenfield typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
Data source: Greenfield 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 Greenfield Compares to Other Months

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

This table compares monthly weather conditions in Greenfield, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)83 mm (3.3 inches)87%moderate
February Weather1°C (34°F)100 mm (3.9 inches)85%moderate
March Weather6°C (43°F)134 mm (5.3 inches)86%high
April Weather11°C (53°F)102 mm (4.0 inches)84%very high
May Weather18°C (65°F)136 mm (5.4 inches)79%very high
June Weather23°C (73°F)105 mm (4.1 inches)82%extreme
July Weather25°C (77°F)112 mm (4.4 inches)79%very high
August Weather23°C (74°F)92 mm (3.6 inches)70%very high
September Weather21°C (70°F)88 mm (3.5 inches)69%very high
October Weather14°C (58°F)102 mm (4.0 inches)76%high
November Weather5°C (42°F)98 mm (3.9 inches)88%moderate
December Weather2°C (36°F)86 mm (3.4 inches)87%moderate

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