January Weather in Mercer, United States

Last updated: June 24, 2025

In Mercer, United States, the average temperature in January hovers around -2°C (28°F), with extremes ranging from a chilly -23°C (-10°F) to a surprisingly warm 20°C (68°F). Expect 101 mm (4.0 in) of precipitation over about 14 days, contributing to a high average humidity of 88%. Be prepared for a mix of frosty and mild days as winter unfolds!

January Temperature in Mercer

In January in Mercer, the average temperature is -2°C (28°F). Maximum temperatures can reach 20°C (68°F), while minimums can drop as low as -23°C (-10°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates January temperature patterns in Mercer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercer, January typically has an average temperature of -2°C (28°F), with highs reaching up to 20°C (68°F) and lows dropping to around -23°C (-10°F).

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

January Precipitation in Mercer

In Mercer in January, the precipitation amount is 101 mm (4.0 in) over the course of 14 days.

January Precipitation Trends in Mercer

The chart displays monthly precipitation patterns in Mercer, 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 Mercer, January typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 14 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 Mercer

In Mercer in January humidity is 88%. With an average temperature of -2°C (28°F), this humidity feels like an icy cling to your skin, making every breath feel brisk and sharp, while the dampness cuts through layers of clothing, leaving travelers yearning for warmth and comfort.

January Average Humidity in Mercer

This chart illustrates the average monthly humidity levels in Mercer, 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 Mercer is approximately 88%, 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 Mercer

In Mercer 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 Mercer, you can check the information here.

Maximum UV Index Levels in Mercer for January

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

Data source: Mercer 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 Mercer Compares to Other Months

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

This table compares monthly weather conditions in Mercer, 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 (28°F)	101 mm (4.0 inches)	88%	moderate
February Weather	0°C (32°F)	110 mm (4.3 inches)	88%	moderate
March Weather	4°C (39°F)	115 mm (4.5 inches)	87%	high
April Weather	9°C (49°F)	144 mm (5.7 inches)	87%	very high
May Weather	16°C (60°F)	149 mm (5.9 inches)	81%	very high
June Weather	20°C (68°F)	140 mm (5.5 inches)	83%	very high
July Weather	23°C (73°F)	146 mm (5.8 inches)	82%	very high
August Weather	21°C (71°F)	105 mm (4.1 inches)	76%	very high
September Weather	19°C (66°F)	113 mm (4.4 inches)	77%	very high
October Weather	13°C (55°F)	127 mm (5.0 inches)	82%	high
November Weather	4°C (40°F)	109 mm (4.3 inches)	89%	moderate
December Weather	1°C (34°F)	106 mm (4.2 inches)	86%	low