January Weather in Lewiston, United States

Last updated: June 24, 2025

In January, the average temperature in Lewiston, United States hovers around -5°C (23°F), with extremes reaching as low as -24°C (-10°F) and peaking at 7°C (46°F). Visitors should be prepared for a chilly climate, as the average humidity stands at a brisk 91%, contributing to a more intense cold. During this month, expect about 68 mm (2.7 in) of precipitation spread over approximately 10 days.

January Temperature in Lewiston

In January in Lewiston, the average temperature is -5°C (23°F). The maximum can reach 7°C (46°F) and the minimum can be as low as -24°C (-10°F). When traveling to Lewiston during this month, be prepared for chilly conditions and pack accordingly.

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 -5°C (23°F), with highs reaching up to 7°C (46°F) and lows dropping to around -24°C (-10°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 precipitation amount is 68 mm (2.7 in) over a span of 10 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 68 mm (2.7 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Lewiston

In Lewiston in January, humidity is 91%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and pushing you to seek warmth at every opportunity.

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 91%, 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	-5°C (23°F)	68 mm (2.7 inches)	91%	moderate
February Weather	-4°C (25°F)	89 mm (3.5 inches)	92%	moderate
March Weather	1°C (34°F)	63 mm (2.5 inches)	84%	very high
April Weather	4°C (40°F)	78 mm (3.1 inches)	74%	very high
May Weather	9°C (49°F)	66 mm (2.6 inches)	62%	extreme
June Weather	17°C (62°F)	31 mm (1.2 inches)	56%	extreme
July Weather	22°C (71°F)	17 mm (0.7 inches)	44%	extreme
August Weather	20°C (69°F)	23 mm (0.9 inches)	37%	extreme
September Weather	15°C (59°F)	36 mm (1.4 inches)	46%	very high
October Weather	6°C (43°F)	49 mm (1.9 inches)	67%	high
November Weather	0°C (33°F)	56 mm (2.2 inches)	84%	moderate
December Weather	-5°C (23°F)	59 mm (2.3 inches)	88%	moderate