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December Weather in Farmington, United States

Last updated: June 24, 2025

In December, the average temperature in Farmington, United States hovers around 4°C (40°F), with a wide range that can dip to a minimum of -15°C (6°F) or soar to a maximum of 25°C (77°F). Expect 70 mm (2.8 in) of precipitation spread over about 7 days, adding to the average humidity of a comfortable 86%.

December Temperature in Farmington

In December in Farmington, the average temperature is 4°C (40°F), with maximums that can reach 25°C (77°F) and minimums that can drop as low as -15°C (6°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Farmington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Farmington, December typically has an average temperature of 4°C (40°F), with highs reaching up to 25°C (77°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec343747556675797571594440
Data source: Temperature data for Farmington 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 Farmington

In Farmington in December, the precipitation amount is 70 mm (2.8 in) over a span of 7 days.

December Precipitation Trends in Farmington

The chart displays monthly precipitation patterns in Farmington, 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 Farmington, December typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec801001341711519088119661157570
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Farmington

In Farmington in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

December Average Humidity in Farmington

This chart illustrates the average monthly humidity levels in Farmington, 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 Farmington is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%80%80%83%83%76%69%68%72%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Farmington

In Farmington 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 Farmington, you can check the information here.

Maximum UV Index Levels in Farmington for December

The chart shows the monthly maximum UV Index (UVI) for Farmington 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 Farmington typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679111111109753
Data source: Farmington 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 Farmington Compares to Other Months

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

This table compares monthly weather conditions in Farmington, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)80 mm (3.2 inches)83%moderate
February Weather3°C (37°F)100 mm (3.9 inches)81%high
March Weather9°C (48°F)134 mm (5.3 inches)80%high
April Weather13°C (55°F)171 mm (6.7 inches)80%very high
May Weather19°C (66°F)150 mm (5.9 inches)83%extreme
June Weather24°C (75°F)90 mm (3.5 inches)83%extreme
July Weather26°C (79°F)87 mm (3.4 inches)76%extreme
August Weather24°C (76°F)119 mm (4.7 inches)69%very high
September Weather22°C (71°F)66 mm (2.6 inches)68%very high
October Weather15°C (59°F)115 mm (4.5 inches)72%high
November Weather7°C (45°F)75 mm (3.0 inches)83%moderate
December Weather4°C (40°F)70 mm (2.8 inches)86%moderate

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