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December Weather in Hayfork, United States

Last updated: June 24, 2025

In December, the average temperature in Hayfork, United States hovers around 3°C (38°F). Expect chilly spells, with a minimum of -10°C (14°F) and a more temperate maximum of 19°C (67°F). The region experiences a total precipitation of 125 mm (4.9 in) over approximately 12 days, with an average humidity of 86% making the air feel quite damp.

December Temperature in Hayfork

In December in Hayfork, the average temperature is 3°C (38°F), with maximums reaching up to 19°C (67°F) and minimums dropping as low as -10°C (14°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for varying weather conditions.

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

The chart illustrates December temperature patterns in Hayfork, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hayfork, December typically has an average temperature of 3°C (38°F), with highs reaching up to 19°C (67°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec394043495564737264544538
Data source: Temperature data for Hayfork 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 Hayfork

In Hayfork in December, the total precipitation amount is 125 mm (4.9 in) spread over 12 days.

December Precipitation Trends in Hayfork

The chart displays monthly precipitation patterns in Hayfork, 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 Hayfork, December typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec171165133775312231349101125
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hayfork

In Hayfork in December humidity is 86%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps through your layers, making traveling uncomfortable as breath clouds visibly in the crisp air.

December Average Humidity in Hayfork

This chart illustrates the average monthly humidity levels in Hayfork, 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 Hayfork is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%85%82%81%79%70%60%62%72%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hayfork

In Hayfork 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 Hayfork, you can check the information here.

Maximum UV Index Levels in Hayfork for December

The chart shows the monthly maximum UV Index (UVI) for Hayfork 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 Hayfork typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111111109743
Data source: Hayfork 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 Hayfork Compares to Other Months

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

This table compares monthly weather conditions in Hayfork, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)171 mm (6.7 inches)86%moderate
February Weather4°C (40°F)165 mm (6.5 inches)85%moderate
March Weather6°C (43°F)133 mm (5.2 inches)85%high
April Weather9°C (49°F)77 mm (3.0 inches)82%very high
May Weather13°C (56°F)53 mm (2.1 inches)81%extreme
June Weather18°C (65°F)12 mm (0.5 inches)79%extreme
July Weather23°C (73°F)2 mm (0.1 inches)70%extreme
August Weather22°C (72°F)3 mm (0.1 inches)60%very high
September Weather18°C (65°F)13 mm (0.5 inches)62%very high
October Weather12°C (55°F)49 mm (1.9 inches)72%high
November Weather7°C (46°F)101 mm (4.0 inches)87%moderate
December Weather3°C (38°F)125 mm (4.9 inches)86%moderate

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