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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 3°C (37°F), with a minimum dipping to -18°C (0°F) and a maximum reaching 20°C (69°F). Expect about 51 mm (2.0 in) of precipitation spread over 6 days, contributing to an average humidity of 86%. It's a time where chilly winds meet occasional downpours, perfect for cozying up indoors!

December Temperature in Greenfield

In December in Greenfield, the average temperature is 3°C (37°F), with maximums reaching up to 20°C (69°F) and minimums dropping as low as -18°C (0°F). Be prepared for a wide range of temperatures, so pack layers for your trip!

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 3°C (37°F), with highs reaching up to 20°C (69°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec303345546675787571584337
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 51 mm (2.0 in) over the course of 6 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 51 mm (2.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec68741351231501078911376976751
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 86%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356910111199643
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 (31°F)68 mm (2.7 inches)82%moderate
February Weather1°C (34°F)74 mm (2.9 inches)80%moderate
March Weather7°C (45°F)135 mm (5.3 inches)80%high
April Weather12°C (54°F)123 mm (4.8 inches)80%very high
May Weather19°C (66°F)150 mm (5.9 inches)82%very high
June Weather24°C (76°F)107 mm (4.2 inches)83%extreme
July Weather26°C (79°F)89 mm (3.5 inches)81%extreme
August Weather24°C (75°F)113 mm (4.5 inches)80%very high
September Weather22°C (71°F)76 mm (3.0 inches)76%very high
October Weather14°C (58°F)97 mm (3.8 inches)76%high
November Weather6°C (43°F)67 mm (2.6 inches)85%moderate
December Weather3°C (37°F)51 mm (2.0 inches)86%moderate

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