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December Weather in Forest Hill, United States

Last updated: June 24, 2025

In Forest Hill, United States, the average temperature in December hovers around 11°C (52°F). Visitors may experience a broad range, with temperatures dipping as low as -5°C (23°F) and soaring up to 29°C (85°F). Expect 51 mm (2.0 in) of precipitation spread over about 7 days, contributing to an average humidity level of 87%. Whether you're bracing for a chill or a warm spell, be prepared for the unique weather of the season!

December Temperature in Forest Hill

In December in Forest Hill, the average temperature is 11°C (52°F). Maximums can reach 29°C (85°F), and minimums can be as low as -5°C (23°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort during their visit.

December Weather in Forest Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Forest Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forest Hill, December typically has an average temperature of 11°C (52°F), with highs reaching up to 29°C (85°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec474961657582858579685751
Data source: Temperature data for Forest Hill 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 Forest Hill

In Forest Hill in December, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.

December Precipitation Trends in Forest Hill

The chart displays monthly precipitation patterns in Forest Hill, 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 Forest Hill, December typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec468795991491003688681345351
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Forest Hill

In Forest Hill in December, humidity is 87%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make your clothes cling uncomfortably, leaving you feeling slightly weighed down while exploring the area.

December Average Humidity in Forest Hill

This chart illustrates the average monthly humidity levels in Forest Hill, 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 Forest Hill is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Forest Hill

In Forest Hill in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Forest Hill for better planning.

Maximum UV Index Levels in Forest Hill for December

The chart shows the monthly maximum UV Index (UVI) for Forest Hill 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 Forest Hill typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Forest Hill 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 Forest Hill Compares to Other Months

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

This table compares monthly weather conditions in Forest Hill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)46 mm (1.8 inches)80%moderate
February Weather9°C (49°F)87 mm (3.4 inches)79%high
March Weather16°C (61°F)95 mm (3.8 inches)78%very high
April Weather18°C (66°F)99 mm (3.9 inches)78%very high
May Weather24°C (75°F)149 mm (5.9 inches)81%extreme
June Weather28°C (82°F)99 mm (3.9 inches)78%extreme
July Weather30°C (86°F)36 mm (1.4 inches)73%extreme
August Weather29°C (85°F)88 mm (3.5 inches)66%extreme
September Weather26°C (79°F)68 mm (2.7 inches)65%very high
October Weather20°C (68°F)134 mm (5.3 inches)72%very high
November Weather14°C (57°F)53 mm (2.1 inches)82%high
December Weather11°C (52°F)51 mm (2.0 inches)87%moderate

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