January Weather in Williamson, United States

Last updated: June 24, 2025

In January, the average temperature in Williamson, United States hovers around 4°C (40°F), with a minimum reaching as low as -15°C (6°F) and a pleasant maximum of 19°C (66°F). Expect 36 mm (1.4 in) of precipitation over approximately 5 days, alongside an average humidity of 77%. Embrace the crisp air and occasional showers while exploring this lovely location!

January Temperature in Williamson

In January in Williamson, the average temperature is 4°C (40°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -15°C (6°F). It’s advisable to prepare for a wide range of temperatures when planning your travel to Williamson during this time.

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

The chart illustrates January temperature patterns in Williamson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williamson, January typically has an average temperature of 4°C (40°F), with highs reaching up to 19°C (66°F) and lows dropping to around -15°C (6°F).

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

January Precipitation in Williamson

In Williamson in January, the precipitation amount is 36 mm (1.4 in) over the course of 5 days.

January Precipitation Trends in Williamson

The chart displays monthly precipitation patterns in Williamson, 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 Williamson, January typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 5 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 Williamson

In Williamson in January humidity is 77%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor exploration less enjoyable and prompting travelers to seek shelter or warm indoor activities instead.

January Average Humidity in Williamson

This chart illustrates the average monthly humidity levels in Williamson, 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 Williamson is approximately 77%, 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 Williamson

In Williamson in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Williamson for better planning.

Maximum UV Index Levels in Williamson for January

The chart shows the monthly maximum UV Index (UVI) for Williamson 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 Williamson typically reaches 4, which falls under the moderate exposure category.

Data source: Williamson 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 Williamson Compares to Other Months

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

This table compares monthly weather conditions in Williamson, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	36 mm (1.4 inches)	77%	moderate
February Weather	5°C (42°F)	38 mm (1.5 inches)	80%	high
March Weather	9°C (48°F)	46 mm (1.8 inches)	68%	very high
April Weather	14°C (58°F)	9 mm (0.4 inches)	58%	extreme
May Weather	18°C (66°F)	14 mm (0.6 inches)	45%	extreme
June Weather	25°C (77°F)	4 mm (0.2 inches)	31%	extreme
July Weather	26°C (80°F)	68 mm (2.7 inches)	27%	extreme
August Weather	26°C (78°F)	39 mm (1.5 inches)	30%	extreme
September Weather	23°C (73°F)	23 mm (0.9 inches)	48%	very high
October Weather	15°C (60°F)	25 mm (1.0 inches)	59%	very high
November Weather	10°C (50°F)	21 mm (0.8 inches)	70%	high
December Weather	5°C (41°F)	24 mm (1.0 inches)	77%	moderate