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December Weather in Brookville, United States

Last updated: June 24, 2025

In Brookville, United States, the average temperature in December hovers around 3°C (37°F). Expect chilly lows that can dip to -18°C (1°F), while the thermometer may peak at a pleasant 19°C (66°F). With an average precipitation of 95 mm (3.8 in) spread over 9 days, and humidity levels at a brisk 87%, prepare for a month that is both crisp and potentially wet.

December Temperature in Brookville

In December in Brookville, the average temperature is 3°C (37°F). The maximum can reach 19°C (66°F), while the minimum can dip as low as -18°C (1°F). Pack layers to stay comfortable during your travels, as the temperature can vary significantly throughout the day.

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

The chart illustrates December temperature patterns in Brookville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brookville, December typically has an average temperature of 3°C (37°F), with highs reaching up to 19°C (66°F) and lows dropping to around -18°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec313543526472767469584237
Data source: Temperature data for Brookville 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 Brookville

In Brookville in December, the total precipitation amount is 95 mm (3.8 in) over the course of 9 days.

December Precipitation Trends in Brookville

The chart displays monthly precipitation patterns in Brookville, 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 Brookville, December typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec78105130109135133130101871009596
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Brookville

In Brookville in December, humidity is 87%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating proper layers to stay warm while navigating the wet conditions.

December Average Humidity in Brookville

This chart illustrates the average monthly humidity levels in Brookville, 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 Brookville is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Brookville

In Brookville 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 Brookville, you can check the information here.

Maximum UV Index Levels in Brookville for December

The chart shows the monthly maximum UV Index (UVI) for Brookville 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 Brookville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
Data source: Brookville 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 Brookville Compares to Other Months

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

This table compares monthly weather conditions in Brookville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)78 mm (3.1 inches)87%moderate
February Weather1°C (35°F)105 mm (4.1 inches)85%moderate
March Weather6°C (43°F)130 mm (5.1 inches)86%high
April Weather11°C (53°F)109 mm (4.3 inches)84%very high
May Weather18°C (65°F)135 mm (5.3 inches)79%very high
June Weather22°C (73°F)133 mm (5.2 inches)82%extreme
July Weather25°C (76°F)130 mm (5.1 inches)79%very high
August Weather23°C (74°F)101 mm (4.0 inches)70%very high
September Weather21°C (69°F)87 mm (3.4 inches)69%very high
October Weather14°C (58°F)100 mm (3.9 inches)76%high
November Weather6°C (42°F)95 mm (3.7 inches)88%moderate
December Weather3°C (37°F)95 mm (3.8 inches)87%moderate

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