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December Weather in Forestville, United States

Last updated: June 24, 2025

In Forestville, United States, the average temperature in December hovers around 9°C (49°F). Expect a minimum of 0°C (32°F) and a comfortable maximum of 24°C (75°F). During this month, you can anticipate 102 mm (4.0 in) of precipitation spread across 9 days, with an average humidity of 84%.

December Temperature in Forestville

In December in Forestville, the average temperature is 9°C (49°F), with maximums reaching 24°C (75°F) and minimums dropping as low as 0°C (32°F). This mild climate makes Forestville an ideal destination for travelers seeking comfortable weather and outdoor activities during this time of year.

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

The chart illustrates December temperature patterns in Forestville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forestville, December typically has an average temperature of 9°C (49°F), with highs reaching up to 24°C (75°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec495052566066686867625349
Data source: Temperature data for Forestville 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 Forestville

In Forestville in December, the total precipitation amount is 102 mm (4.0 in) over a span of 9 days.

December Precipitation Trends in Forestville

The chart displays monthly precipitation patterns in Forestville, 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 Forestville, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec14015796473020024361102
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Forestville

In Forestville in December, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

December Average Humidity in Forestville

This chart illustrates the average monthly humidity levels in Forestville, 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 Forestville is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%80%80%76%70%66%68%72%84%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Forestville

In Forestville 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 Forestville, you can check the information here.

Maximum UV Index Levels in Forestville for December

The chart shows the monthly maximum UV Index (UVI) for Forestville 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 Forestville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578101111109643
Data source: Forestville 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 Forestville Compares to Other Months

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

This table compares monthly weather conditions in Forestville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)140 mm (5.5 inches)86%moderate
February Weather10°C (51°F)157 mm (6.2 inches)84%moderate
March Weather11°C (52°F)96 mm (3.8 inches)83%high
April Weather13°C (57°F)47 mm (1.9 inches)80%very high
May Weather16°C (60°F)30 mm (1.2 inches)80%very high
June Weather19°C (67°F)2 mm (0.1 inches)76%extreme
July Weather20°C (68°F)0 mm (0.0 inches)70%extreme
August Weather20°C (68°F)0 mm (0.0 inches)66%very high
September Weather19°C (67°F)2 mm (0.1 inches)68%very high
October Weather16°C (62°F)43 mm (1.7 inches)72%high
November Weather12°C (54°F)61 mm (2.4 inches)84%moderate
December Weather9°C (49°F)102 mm (4.0 inches)84%moderate

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