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December Weather in Oakville, United States

Last updated: June 24, 2025

In December, the average temperature in Oakville, United States hovers around 4°C (40°F), with lows dipping down to -6°C (21°F) and highs reaching up to 13°C (55°F). Expect 210 mm (8.3 in) of precipitation spread across 19 days, contributing to an average humidity of a chilly 87%. Prepare for a damp and crisp atmosphere as you explore!

December Temperature in Oakville

In December in Oakville, the average temperature is 4°C (40°F). Maximums can reach 13°C (55°F), while minimums can drop as low as -6°C (21°F). Travelers should pack accordingly to enjoy their stay comfortably amidst the chilly weather.

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

The chart illustrates December temperature patterns in Oakville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oakville, December typically has an average temperature of 4°C (40°F), with highs reaching up to 13°C (55°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec413944485459636459504440
Data source: Temperature data for Oakville 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 Oakville

In Oakville in December, the total precipitation amount is 210 mm (8.3 in) over a span of 19 days.

December Precipitation Trends in Oakville

The chart displays monthly precipitation patterns in Oakville, 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 Oakville, December typically receives around 210 mm (8.3 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec2051711421227557111390137198210
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Oakville

In Oakville in December humidity is 87%. With an average temperature of 4°C (40°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it essential to dress warmly and prepare for damp conditions, which can dampen your spirits while traveling.

December Average Humidity in Oakville

This chart illustrates the average monthly humidity levels in Oakville, 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 Oakville is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%85%83%84%84%82%73%74%83%86%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Oakville

In Oakville 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 Oakville, you can visit Hourly UV Index in Oakville.

Maximum UV Index Levels in Oakville for December

The chart shows the monthly maximum UV Index (UVI) for Oakville 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 Oakville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235699987532
Data source: Oakville 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 Oakville Compares to Other Months

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

This table compares monthly weather conditions in Oakville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)205 mm (8.1 inches)86%low
February Weather4°C (40°F)171 mm (6.7 inches)84%moderate
March Weather6°C (44°F)142 mm (5.6 inches)85%moderate
April Weather9°C (49°F)122 mm (4.8 inches)83%high
May Weather12°C (55°F)75 mm (2.9 inches)84%very high
June Weather15°C (59°F)57 mm (2.2 inches)84%very high
July Weather17°C (63°F)11 mm (0.4 inches)82%very high
August Weather18°C (64°F)13 mm (0.5 inches)73%very high
September Weather15°C (60°F)90 mm (3.5 inches)74%high
October Weather10°C (50°F)137 mm (5.4 inches)83%moderate
November Weather7°C (45°F)198 mm (7.8 inches)86%moderate
December Weather4°C (40°F)210 mm (8.3 inches)87%low

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