January Weather in Mason, United States

Last updated: June 24, 2025

In Mason, United States, the average temperature in January hovers around 5°C (42°F), with lows dipping to -18°C (0°F) and highs reaching up to 23°C (74°F). Expect 102 mm (4.0 in) of precipitation spread over 9 days, and enjoy an average humidity level of 86% for that characteristic chill in the air.

January Temperature in Mason

In January in Mason, the average temperature is 5°C (42°F), with maximums reaching 23°C (74°F) and minimums dropping as low as -18°C (0°F). It's essential to be prepared for a wide range of temperatures when planning your travels during this time.

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

The chart illustrates January temperature patterns in Mason, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mason, January typically has an average temperature of 5°C (42°F), with highs reaching up to 23°C (74°F) and lows dropping to around -18°C (0°F).

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

January Precipitation in Mason

In Mason in January, the total precipitation amount is 102 mm (4.0 in) over a span of 9 days.

January Precipitation Trends in Mason

The chart displays monthly precipitation patterns in Mason, 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 Mason, January typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 9 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 Mason

In Mason in January, humidity is 86%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that penetrates your layers, making outdoor activities quite uncomfortable and prompting you to seek warmth indoors more often.

January Average Humidity in Mason

This chart illustrates the average monthly humidity levels in Mason, 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 Mason 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 Mason

In Mason 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 Mason, you can check the information here.

Maximum UV Index Levels in Mason for January

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

Data source: Mason 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 Mason Compares to Other Months

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

This table compares monthly weather conditions in Mason, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	102 mm (4.0 inches)	86%	moderate
February Weather	7°C (45°F)	172 mm (6.8 inches)	85%	high
March Weather	12°C (55°F)	169 mm (6.6 inches)	84%	high
April Weather	16°C (61°F)	139 mm (5.5 inches)	81%	very high
May Weather	22°C (72°F)	108 mm (4.2 inches)	83%	very high
June Weather	26°C (78°F)	106 mm (4.2 inches)	83%	extreme
July Weather	27°C (82°F)	120 mm (4.7 inches)	80%	extreme
August Weather	26°C (79°F)	113 mm (4.5 inches)	73%	very high
September Weather	24°C (76°F)	102 mm (4.0 inches)	70%	very high
October Weather	18°C (64°F)	114 mm (4.5 inches)	73%	high
November Weather	10°C (50°F)	80 mm (3.1 inches)	85%	moderate
December Weather	8°C (46°F)	145 mm (5.7 inches)	88%	moderate