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December Weather in Seymour, United States

Last updated: June 24, 2025

In Seymour, United States, the average temperature in December hovers around 2°C (36°F), with a minimum drop to a brisk -16°C (4°F) and occasionally reaching a maximum of 17°C (62°F). Expect about 124 mm (4.9 in) of precipitation spread over 10 days, with an average humidity level of 80% that envelops the region in a cool, damp embrace.

December Temperature in Seymour

In December, in Seymour, the average temperature is 2°C (36°F), with maximums reaching 17°C (62°F) and minimums dropping as low as -16°C (4°F). This variability in weather means travelers should be prepared for both chilly conditions and surprisingly mild days.

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

The chart illustrates December temperature patterns in Seymour, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seymour, December typically has an average temperature of 2°C (36°F), with highs reaching up to 17°C (62°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec313439495969757467574335
Data source: Temperature data for Seymour 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 Seymour

In Seymour in December, the precipitation amount is 124 mm (4.9 in) spread over a duration of 10 days.

December Precipitation Trends in Seymour

The chart displays monthly precipitation patterns in Seymour, 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 Seymour, December typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec699392130111991439510513893124
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Seymour

In Seymour in December humidity is 80%. With an average temperature of 2°C (36°F), this humidity feels like a heavy, damp chill that seeps into your bones, making it challenging for outdoor adventures and often necessitating layered clothing to stay warm and comfortable while exploring.

December Average Humidity in Seymour

This chart illustrates the average monthly humidity levels in Seymour, 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 Seymour is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Seymour

In Seymour in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Seymour, you can visit Hourly UV Index in Seymour.

Maximum UV Index Levels in Seymour for December

The chart shows the monthly maximum UV Index (UVI) for Seymour 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 Seymour typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Seymour 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 Seymour Compares to Other Months

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

This table compares monthly weather conditions in Seymour, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)69 mm (2.7 inches)84%moderate
February Weather1°C (34°F)93 mm (3.7 inches)82%moderate
March Weather4°C (39°F)91 mm (3.6 inches)81%high
April Weather9°C (49°F)130 mm (5.1 inches)78%very high
May Weather15°C (60°F)110 mm (4.3 inches)69%very high
June Weather20°C (69°F)99 mm (3.9 inches)69%very high
July Weather24°C (75°F)143 mm (5.6 inches)62%very high
August Weather23°C (74°F)94 mm (3.7 inches)65%very high
September Weather19°C (67°F)105 mm (4.1 inches)68%very high
October Weather14°C (57°F)138 mm (5.4 inches)74%high
November Weather6°C (44°F)93 mm (3.7 inches)82%moderate
December Weather2°C (36°F)124 mm (4.9 inches)80%low

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