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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 2°C (35°F). Temperatures can range from a chilly -22°C (-8°F) to a mild 18°C (65°F). Expect about 133 mm (5.2 in) of precipitation across 16 days, contributing to the 85% humidity that characterizes this season. Stay prepared for a mix of weather!

December Temperature in Farmington

In December in Farmington, the average temperature is 2°C (35°F), with maximums reaching 18°C (65°F) and minimums dropping to as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures, making layered clothing essential for a comfortable visit.

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 2°C (35°F), with highs reaching up to 18°C (65°F) and lows dropping to around -22°C (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec303540506067727065554135
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 total precipitation amount is 133 mm (5.2 in) spread over 16 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 133 mm (5.2 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec971441231411521511069111311993133
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 85%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that permeates your clothing, making travel uncomfortable and requiring extra layers to stay warm and dry.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108753
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 Weather-1°C (30°F)97 mm (3.8 inches)86%moderate
February Weather1°C (35°F)144 mm (5.7 inches)86%moderate
March Weather4°C (40°F)123 mm (4.8 inches)86%high
April Weather10°C (50°F)141 mm (5.6 inches)84%very high
May Weather16°C (60°F)152 mm (6.0 inches)78%very high
June Weather20°C (68°F)151 mm (5.9 inches)79%very high
July Weather22°C (72°F)106 mm (4.2 inches)70%very high
August Weather21°C (71°F)91 mm (3.6 inches)59%very high
September Weather18°C (65°F)112 mm (4.4 inches)68%very high
October Weather13°C (56°F)119 mm (4.7 inches)80%high
November Weather5°C (41°F)93 mm (3.7 inches)86%moderate
December Weather2°C (35°F)133 mm (5.2 inches)85%moderate

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