January Weather in Lewiston, United States

Last updated: June 24, 2025

In January, the average temperature in Lewiston, United States hovers around -2°C (29°F). While you can expect chilly days, temperatures can dip as low as -18°C (0°F) or warm up to a maximum of 13°C (55°F). Additionally, be prepared for some precipitation, with an average of 78 mm (3.1 in) spread over 12 days. The air is quite humid as well, boasting an average humidity level of 91%.

January Temperature in Lewiston

In January in Lewiston, the average temperature is -2°C (29°F). Maximums can reach 13°C (55°F), and minimums can be as low as -18°C (0°F). Be prepared for a wide range of temperatures if you plan to travel during this month.

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 -2°C (29°F), with highs reaching up to 13°C (55°F) and lows dropping to around -18°C (0°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 78 mm (3.1 in), occurring over a span of 12 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 78 mm (3.1 inches) of precipitation spread over approximately 12 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 91%. With an average temperature of -2°C (29°F), this humidity feels like a chilling embrace that can quickly sap your energy, making outdoor adventures uncomfortable and dampening the joy of exploration.

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 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Lewiston, you can visit Hourly UV Index in Lewiston.

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 2, which falls under the low 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	-2°C (29°F)	78 mm (3.1 inches)	91%	low
February Weather	-1°C (30°F)	87 mm (3.4 inches)	91%	moderate
March Weather	2°C (35°F)	71 mm (2.8 inches)	88%	moderate
April Weather	6°C (43°F)	118 mm (4.6 inches)	88%	very high
May Weather	11°C (53°F)	99 mm (3.9 inches)	82%	very high
June Weather	18°C (64°F)	81 mm (3.2 inches)	79%	very high
July Weather	23°C (73°F)	115 mm (4.5 inches)	77%	very high
August Weather	22°C (73°F)	85 mm (3.3 inches)	72%	very high
September Weather	19°C (66°F)	73 mm (2.9 inches)	76%	high
October Weather	13°C (56°F)	128 mm (5.0 inches)	83%	moderate
November Weather	6°C (42°F)	89 mm (3.5 inches)	88%	moderate
December Weather	1°C (35°F)	90 mm (3.5 inches)	87%	low