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December Weather in Forest Hill, United States

Last updated: June 24, 2025

In December, the average temperature in Forest Hill, United States is a comfy 13°C (55°F), but be prepared for a range; it can dip to a chilly -3°C (27°F) or rise to a warm 28°C (83°F). This month sees about 120 mm (4.7 in) of precipitation over approximately 10 days, with humidity levels often reaching a high 88%. Don't forget your umbrella and enjoy the varied climate!

December Temperature in Forest Hill

In December in Forest Hill, the average temperature is 13°C (55°F), with maximums reaching 28°C (83°F) and minimums dropping as low as -3°C (27°F). This variability makes Forest Hill an interesting destination for travelers seeking diverse weather experiences.

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 13°C (55°F), with highs reaching up to 28°C (83°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec515663677580828279715855
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 120 mm (4.7 in) spread over a duration of 10 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 120 mm (4.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec11112210216719813315814813412169120
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 88%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring, as the moisture in the air can lead to a rather uncomfortable experience for traveling.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%79%80%81%76%73%72%72%73%83%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121110864
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 Weather11°C (52°F)111 mm (4.4 inches)81%moderate
February Weather13°C (56°F)122 mm (4.8 inches)81%high
March Weather17°C (64°F)102 mm (4.0 inches)79%very high
April Weather19°C (67°F)167 mm (6.6 inches)80%extreme
May Weather24°C (76°F)198 mm (7.8 inches)81%extreme
June Weather27°C (80°F)132 mm (5.2 inches)76%extreme
July Weather28°C (82°F)158 mm (6.2 inches)73%extreme
August Weather28°C (82°F)148 mm (5.8 inches)71%extreme
September Weather26°C (79°F)134 mm (5.3 inches)72%very high
October Weather21°C (71°F)121 mm (4.8 inches)73%very high
November Weather14°C (58°F)69 mm (2.7 inches)83%high
December Weather13°C (55°F)120 mm (4.7 inches)88%moderate

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