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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 1°C (35°F). However, temperatures can range dramatically, dipping as low as -21°C (-5°F) and peaking at 22°C (73°F). Expect some moisture in the air with an average precipitation of 43 mm (1.7 in) spread over 5 days, and a notably high humidity level of 84%. Prepare accordingly for this diverse weather!

December Temperature in Hamilton

In December in Hamilton, the average temperature is 1°C (35°F). The maximum can reach 22°C (73°F) and the minimum can be as low as -21°C (-5°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 1°C (35°F), with highs reaching up to 22°C (73°F) and lows dropping to around -21°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec272942516475787570564134
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 43 mm (1.7 in) over the course of 5 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 43 mm (1.7 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec5760101971671218384981125243
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 84%. With an average temperature of 1°C (35°F), this humidity feels like a cold, damp chill that seeps into your bones, making it feel much colder than the thermometer suggests, which can be quite uncomfortable for traveling.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098642
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-3°C (27°F)57 mm (2.2 inches)81%moderate
February Weather-2°C (29°F)60 mm (2.4 inches)81%moderate
March Weather6°C (43°F)101 mm (4.0 inches)81%high
April Weather11°C (52°F)97 mm (3.8 inches)82%very high
May Weather18°C (65°F)166 mm (6.6 inches)78%very high
June Weather24°C (76°F)121 mm (4.8 inches)81%extreme
July Weather26°C (79°F)83 mm (3.3 inches)79%very high
August Weather24°C (75°F)84 mm (3.3 inches)77%very high
September Weather21°C (70°F)98 mm (3.9 inches)78%very high
October Weather13°C (56°F)112 mm (4.4 inches)78%high
November Weather5°C (41°F)52 mm (2.0 inches)87%moderate
December Weather1°C (35°F)43 mm (1.7 inches)84%low

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