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December Weather in Hamilton, United States

Last updated: June 24, 2025

In December, the average temperature in Hamilton, United States hovers around -7°C (20°F), making it a chilly destination. Expect minimums plummeting to -24°C (-11°F) and highs reaching up to 10°C (51°F). With 88 mm (3.5 in) of precipitation spread over 17 days, it's wise to prepare for wet weather, while an average humidity of 95% ensures that the air feels crisp and cool.

December Temperature in Hamilton

In December in Hamilton, the average temperature is -7°C (20°F). Maximums can reach 10°C (51°F) and minimums can dip as low as -24°C (-11°F). Be prepared for a range of temperatures during your travels, and pack accordingly for both chilly days and milder conditions.

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

The chart illustrates December temperature patterns in Hamilton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hamilton, December typically has an average temperature of -7°C (20°F), with highs reaching up to 10°C (51°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec212130344354646252362720
Data source: Temperature data for Hamilton 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 Hamilton

In Hamilton in December, the precipitation amount is 88 mm (3.5 in) spread over 17 days.

December Precipitation Trends in Hamilton

The chart displays monthly precipitation patterns in Hamilton, 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 Hamilton, December typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec6513882887694263245858188
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hamilton

In Hamilton in December, humidity is 95%. With an average temperature of -7°C (20°F), this humidity feels like stepping into a freezer filled with damp air, making it uncomfortably chilling for traveling and causing your skin to feel clammy even in such frigid conditions.

December Average Humidity in Hamilton

This chart illustrates the average monthly humidity levels in Hamilton, 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 Hamilton is approximately 95%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%89%85%80%78%77%66%67%77%89%95%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hamilton

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

Maximum UV Index Levels in Hamilton for December

The chart shows the monthly maximum UV Index (UVI) for Hamilton 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 Hamilton typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246810101098532
Data source: Hamilton 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 Hamilton Compares to Other Months

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

This table compares monthly weather conditions in Hamilton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)65 mm (2.6 inches)93%low
February Weather-6°C (21°F)138 mm (5.4 inches)92%moderate
March Weather-1°C (30°F)82 mm (3.2 inches)89%high
April Weather1°C (34°F)88 mm (3.4 inches)85%very high
May Weather6°C (43°F)76 mm (3.0 inches)80%very high
June Weather12°C (54°F)94 mm (3.7 inches)78%very high
July Weather18°C (64°F)26 mm (1.0 inches)77%very high
August Weather17°C (62°F)32 mm (1.2 inches)66%very high
September Weather11°C (53°F)45 mm (1.8 inches)67%very high
October Weather2°C (37°F)85 mm (3.4 inches)77%moderate
November Weather-3°C (27°F)81 mm (3.2 inches)89%moderate
December Weather-7°C (20°F)88 mm (3.5 inches)95%low

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