January Weather in Hamilton, United States

Last updated: June 24, 2025

In January, the average temperature in Hamilton, United States hovers around 2°C (36°F), but expect fluctuations with minimums dipping to -17°C (2°F) and maximums reaching 21°C (69°F). You'll also encounter about 59 mm (2.3 in) of precipitation over 8 days, contributing to the average humidity level of a cozy 86%.

January Temperature in Hamilton

In January in Hamilton, the average temperature is 2°C (36°F). Maximum temperatures can reach 21°C (69°F), while minimum temperatures can drop to as low as -17°C (2°F). It's advisable to pack layers to prepare for this wide range of temperatures while exploring the beauty of Hamilton.

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

The chart illustrates January 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, January typically has an average temperature of 2°C (36°F), with highs reaching up to 21°C (69°F) and lows dropping to around -17°C (2°F).

Data source: Temperature data for Hamilton generated using information from the Copernicus Climate Change Service.

January Precipitation in Hamilton

In Hamilton in January, the total precipitation amount is 59 mm (2.3 in) spread over 8 days.

January Precipitation Trends in Hamilton

The chart displays monthly precipitation patterns in Hamilton, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Hamilton, January typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Hamilton

In Hamilton in January, 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.

January Average Humidity in Hamilton

This chart illustrates the average monthly humidity levels in Hamilton, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Hamilton is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Hamilton

In Hamilton in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Hamilton in January, 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 January, the maximum UV index in Hamilton typically reaches 3, which falls under the moderate exposure category.

Data source: Hamilton January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	59 mm (2.3 inches)	86%	moderate
February Weather	4°C (40°F)	94 mm (3.7 inches)	86%	moderate
March Weather	7°C (45°F)	85 mm (3.4 inches)	86%	high
April Weather	13°C (55°F)	100 mm (4.0 inches)	84%	very high
May Weather	18°C (65°F)	138 mm (5.4 inches)	78%	very high
June Weather	23°C (74°F)	108 mm (4.2 inches)	79%	very high
July Weather	26°C (79°F)	124 mm (4.9 inches)	70%	very high
August Weather	25°C (77°F)	110 mm (4.3 inches)	59%	very high
September Weather	21°C (71°F)	103 mm (4.1 inches)	68%	very high
October Weather	16°C (61°F)	100 mm (3.9 inches)	80%	high
November Weather	8°C (46°F)	83 mm (3.3 inches)	86%	moderate
December Weather	4°C (39°F)	93 mm (3.6 inches)	85%	moderate