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December Weather in Seneca, United States

Last updated: June 24, 2025

In December, the average temperature in Seneca, United States hovers around 6°C (43°F). During this time, temperatures can range from a chilly -11°C (13°F) to a warm 24°C (75°F). Expect 53 mm (2.1 in) of precipitation spread over 6 days, accompanied by a high average humidity of 87%.

December Temperature in Seneca

In December in Seneca, the average temperature is 6°C (43°F). Maximums can reach 24°C (75°F) and minimums can be as low as -11°C (13°F). Travelers should prepare for a wide range of temperatures, ensuring they have both warm and cool clothing options.

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

The chart illustrates December temperature patterns in Seneca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seneca, December typically has an average temperature of 6°C (43°F), with highs reaching up to 24°C (75°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec373951576777807874604843
Data source: Temperature data for Seneca 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 Seneca

In Seneca in December, the precipitation amount is 53 mm (2.1 in) over a span of 6 days.

December Precipitation Trends in Seneca

The chart displays monthly precipitation patterns in Seneca, 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 Seneca, December typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec85781471511739395113691486153
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Seneca

In Seneca in December, humidity is 87%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating warm, breathable layers for traveling.

December Average Humidity in Seneca

This chart illustrates the average monthly humidity levels in Seneca, 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 Seneca is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Seneca

In Seneca 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 Seneca, you can check the information here.

Maximum UV Index Levels in Seneca for December

The chart shows the monthly maximum UV Index (UVI) for Seneca 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 Seneca typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Seneca 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 Seneca Compares to Other Months

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

This table compares monthly weather conditions in Seneca, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)85 mm (3.4 inches)81%moderate
February Weather4°C (40°F)78 mm (3.1 inches)78%high
March Weather11°C (51°F)146 mm (5.8 inches)76%high
April Weather14°C (57°F)151 mm (6.0 inches)78%very high
May Weather20°C (67°F)173 mm (6.8 inches)83%very high
June Weather25°C (77°F)93 mm (3.6 inches)83%extreme
July Weather27°C (80°F)95 mm (3.7 inches)78%extreme
August Weather25°C (78°F)113 mm (4.5 inches)68%very high
September Weather23°C (74°F)69 mm (2.7 inches)64%very high
October Weather16°C (60°F)148 mm (5.8 inches)70%high
November Weather9°C (48°F)61 mm (2.4 inches)83%moderate
December Weather6°C (43°F)53 mm (2.1 inches)87%moderate

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