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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 (36°F). However, be prepared for a wide range, as temperatures can drop to a chilly -21°C (-5°F) or peak at a comfortable 23°C (74°F). Rain is likely, with an average precipitation of 33 mm (1.3 in) spread over about 4 days, while the air remains quite humid, boasting an average humidity of 86%.

December Temperature in Hamilton

In December in Hamilton, the average temperature is 2°C (36°F). Maximum temperatures can reach 23°C (74°F), while minimums can drop to as low as -21°C (-5°F). Be prepared for a wide range of weather conditions if you plan to travel 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 (36°F), with highs reaching up to 23°C (74°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec283145536576797671564236
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 33 mm (1.3 in) over a span of 4 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 33 mm (1.3 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec5440988420013311098931345033
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 (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.

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.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%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 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Hamilton, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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-2°C (29°F)54 mm (2.1 inches)80%moderate
February Weather-1°C (31°F)40 mm (1.6 inches)78%moderate
March Weather7°C (45°F)98 mm (3.8 inches)75%high
April Weather12°C (53°F)84 mm (3.3 inches)77%very high
May Weather18°C (65°F)200 mm (7.9 inches)82%very high
June Weather25°C (76°F)133 mm (5.2 inches)83%extreme
July Weather26°C (79°F)110 mm (4.3 inches)81%extreme
August Weather24°C (76°F)98 mm (3.9 inches)78%very high
September Weather21°C (71°F)93 mm (3.6 inches)72%very high
October Weather13°C (56°F)134 mm (5.3 inches)72%high
November Weather6°C (43°F)50 mm (2.0 inches)84%moderate
December Weather2°C (36°F)33 mm (1.3 inches)86%moderate

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