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December Weather in Richmond Hill, United States

Last updated: June 24, 2025

In December, the average temperature in Richmond Hill, United States hovers around 13°C (55°F). However, be prepared for fluctuations, as temperatures can dip to a chilly -4°C (24°F) or soar to a pleasant 27°C (81°F). During this month, expect about 114 mm (4.5 in) of precipitation spread over 8 days, contributing to an average humidity of 85%. Stay ready for a mix of weather conditions!

December Temperature in Richmond Hill

In December in Richmond Hill, the average temperature is 13°C (55°F), with maximums that can reach 27°C (81°F) and minimums that can drop as low as -4°C (24°F). Pack layers and be prepared for a wide range of temperatures during your travels!

December Weather in Richmond Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Richmond Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Richmond Hill, December typically has an average temperature of 13°C (55°F), with highs reaching up to 27°C (81°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec525861677579828178725955
Data source: Temperature data for Richmond Hill 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 Richmond Hill

In Richmond Hill in December, the total precipitation amount is 114 mm (4.5 in) spread over a duration of 8 days.

December Precipitation Trends in Richmond Hill

The chart displays monthly precipitation patterns in Richmond Hill, 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 Richmond Hill, December typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec577863741011501681771218085114
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Richmond Hill

In Richmond Hill in December, humidity is 85%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making even short walks feel exhausting and urging travelers to seek shade and refreshment frequently.

December Average Humidity in Richmond Hill

This chart illustrates the average monthly humidity levels in Richmond Hill, 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 Richmond Hill is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%79%78%73%72%74%82%82%83%79%82%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Richmond Hill

In Richmond Hill 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 Richmond Hill for better planning.

Maximum UV Index Levels in Richmond Hill for December

The chart shows the monthly maximum UV Index (UVI) for Richmond Hill 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 Richmond Hill typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479101111111110864
Data source: Richmond Hill 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 Richmond Hill Compares to Other Months

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

This table compares monthly weather conditions in Richmond Hill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)57 mm (2.2 inches)84%moderate
February Weather14°C (58°F)78 mm (3.1 inches)79%high
March Weather16°C (62°F)63 mm (2.5 inches)78%very high
April Weather19°C (67°F)74 mm (2.9 inches)72%very high
May Weather24°C (75°F)101 mm (4.0 inches)72%extreme
June Weather26°C (79°F)150 mm (5.9 inches)74%extreme
July Weather28°C (82°F)168 mm (6.6 inches)82%extreme
August Weather27°C (81°F)177 mm (7.0 inches)82%extreme
September Weather26°C (78°F)121 mm (4.7 inches)83%very high
October Weather22°C (72°F)80 mm (3.2 inches)79%very high
November Weather15°C (59°F)85 mm (3.3 inches)82%high
December Weather13°C (55°F)114 mm (4.5 inches)85%moderate

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