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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 -2°C (29°F). However, be prepared for a range of temperatures, as it can drop to a chilly -21°C (-5°F) or rise to a comfortable 16°C (61°F). This month also brings 103 mm (4.1 in) of precipitation over 16 days, contributing to the average humidity level of 86%.

December Temperature in Hamilton

In December in Hamilton, the average temperature is -2°C (29°F). The maximum can reach 16°C (61°F) and the minimum can be as low as -21°C (-5°F). It's advisable to dress warmly and be prepared for a wide range of temperatures if you're traveling during this time.

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 -2°C (29°F), with highs reaching up to 16°C (61°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec232632445665706861513729
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 103 mm (4.1 in) spread over 16 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 103 mm (4.1 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec921019312113411916713796169108104
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 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec34691010998642
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-5°C (24°F)92 mm (3.6 inches)90%moderate
February Weather-3°C (27°F)101 mm (4.0 inches)90%moderate
March Weather0°C (33°F)93 mm (3.7 inches)87%high
April Weather7°C (44°F)121 mm (4.7 inches)88%very high
May Weather14°C (57°F)134 mm (5.3 inches)82%very high
June Weather18°C (65°F)119 mm (4.7 inches)79%very high
July Weather21°C (70°F)167 mm (6.6 inches)78%very high
August Weather20°C (68°F)137 mm (5.4 inches)76%very high
September Weather16°C (62°F)96 mm (3.8 inches)78%very high
October Weather11°C (52°F)168 mm (6.6 inches)84%high
November Weather3°C (37°F)108 mm (4.3 inches)89%moderate
December Weather-2°C (29°F)103 mm (4.1 inches)86%low

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