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December Weather in Wilton, United States

Last updated: June 24, 2025

In December, the average temperature in Wilton, United States hovers around 10°C (51°F), with a minimum dip to -5°C (23°F) and a potential high of 25°C (78°F). This month sees about 140 mm (5.5 in) of precipitation spread over 12 days, contributing to a notably high average humidity of 88%. Prepare for a mix of chilly and mild days, perfect for cozy indoor activities or enjoying the fresh, crisp air!

December Temperature in Wilton

In December in Wilton, the average temperature is 10°C (51°F). Maximums can reach 25°C (78°F), while minimums can dip as low as -5°C (23°F). It’s a season of varied temperatures, so travelers should be prepared for both warm days and chilly nights.

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

The chart illustrates December temperature patterns in Wilton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wilton, December typically has an average temperature of 10°C (51°F), with highs reaching up to 25°C (78°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec485459647378818077685451
Data source: Temperature data for Wilton 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 Wilton

In Wilton in December, the total precipitation amount is 140 mm (5.5 in) over the course of 12 days.

December Precipitation Trends in Wilton

The chart displays monthly precipitation patterns in Wilton, 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 Wilton, December typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1071571331441091551111278112986140
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Wilton

In Wilton in December, humidity is 88%. With an average temperature of 10°C (51°F), this humidity feels like a thick blanket of moisture enveloping you, making every step feel heavier and leaving you yearning for a refreshing breeze as you navigate the streets.

December Average Humidity in Wilton

This chart illustrates the average monthly humidity levels in Wilton, 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 Wilton is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%81%77%77%72%73%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Wilton

In Wilton 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 Wilton for better planning.

Maximum UV Index Levels in Wilton for December

The chart shows the monthly maximum UV Index (UVI) for Wilton 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 Wilton typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Wilton 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 Wilton Compares to Other Months

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

This table compares monthly weather conditions in Wilton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)107 mm (4.2 inches)85%moderate
February Weather12°C (54°F)157 mm (6.2 inches)84%high
March Weather15°C (60°F)133 mm (5.2 inches)82%very high
April Weather18°C (64°F)144 mm (5.7 inches)82%very high
May Weather23°C (73°F)109 mm (4.3 inches)81%extreme
June Weather26°C (78°F)155 mm (6.1 inches)77%extreme
July Weather27°C (81°F)111 mm (4.4 inches)77%extreme
August Weather27°C (81°F)127 mm (5.0 inches)72%extreme
September Weather25°C (78°F)81 mm (3.2 inches)73%very high
October Weather20°C (69°F)129 mm (5.1 inches)73%very high
November Weather12°C (54°F)85 mm (3.4 inches)85%high
December Weather10°C (51°F)140 mm (5.5 inches)88%moderate

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