January Weather in Lewiston, United States

Last updated: June 24, 2025

In Lewiston, United States, the average temperature in January hovers around 4°C (40°F), with a minimum dip to -9°C (16°F) and a maximum rise to 17°C (63°F). Expect about 163 mm (6.4 in) of precipitation spread over 13 days, contributing to an average humidity of 86%. Stay prepared for a cool and damp month!

January Temperature in Lewiston

In January in Lewiston, the average temperature is 4°C (40°F). The maximum can reach 17°C (63°F), while the minimum can drop as low as -9°C (16°F). Travelers should prepare for a chilly climate and dress in layers to ensure comfort throughout the varying temperatures.

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

The chart illustrates January temperature patterns in Lewiston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lewiston, January typically has an average temperature of 4°C (40°F), with highs reaching up to 17°C (63°F) and lows dropping to around -9°C (16°F).

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

January Precipitation in Lewiston

In Lewiston in January, the total precipitation amount is 163 mm (6.4 in), occurring over the course of 13 days.

January Precipitation Trends in Lewiston

The chart displays monthly precipitation patterns in Lewiston, 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 Lewiston, January typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 13 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 Lewiston

In Lewiston in January humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

January Average Humidity in Lewiston

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

In Lewiston 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 Lewiston, you can check the information here.

Maximum UV Index Levels in Lewiston for January

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

Data source: Lewiston 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 Lewiston Compares to Other Months

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

This table compares monthly weather conditions in Lewiston, 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)	163 mm (6.4 inches)	86%	moderate
February Weather	5°C (41°F)	156 mm (6.1 inches)	85%	moderate
March Weather	7°C (44°F)	137 mm (5.4 inches)	85%	high
April Weather	11°C (51°F)	82 mm (3.2 inches)	82%	very high
May Weather	15°C (59°F)	62 mm (2.4 inches)	81%	extreme
June Weather	20°C (69°F)	15 mm (0.6 inches)	79%	extreme
July Weather	25°C (77°F)	2 mm (0.1 inches)	70%	extreme
August Weather	24°C (76°F)	4 mm (0.1 inches)	60%	very high
September Weather	20°C (68°F)	12 mm (0.5 inches)	62%	very high
October Weather	13°C (56°F)	52 mm (2.0 inches)	72%	high
November Weather	8°C (46°F)	97 mm (3.8 inches)	87%	moderate
December Weather	4°C (39°F)	118 mm (4.6 inches)	86%	moderate