January Weather in Lancaster, United States

Last updated: June 24, 2025

In January, the average temperature in Lancaster, United States hovers around -6°C (21°F). While the minimum can plummet to an astonishing -33°C (-27°F), the maximum can reach a mild 10°C (50°F). Expect about 46 mm (1.8 in) of precipitation over approximately 8 days, coupled with an average humidity of 84%, creating a truly wintry atmosphere.

January Temperature in Lancaster

In January, in Lancaster, the average temperature is -6°C (21°F). The maximum can reach 10°C (50°F) and the minimum can be as low as -33°C (-27°F). Travelers should prepare for cold weather conditions and pack accordingly for their visit.

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

The chart illustrates January temperature patterns in Lancaster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lancaster, January typically has an average temperature of -6°C (21°F), with highs reaching up to 10°C (50°F) and lows dropping to around -33°C (-27°F).

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

January Precipitation in Lancaster

In Lancaster in January, the precipitation amount is 46 mm (1.8 in) over the course of 8 days.

January Precipitation Trends in Lancaster

The chart displays monthly precipitation patterns in Lancaster, 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 Lancaster, January typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 8 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 Lancaster

In Lancaster in January humidity is 84%. With an average temperature of -6°C (21°F), this humidity feels like an icy blanket enveloping you, making travel uncomfortable as the cold dampness seeps into your bones and slows your movements, turning each step into a shivering struggle.

January Average Humidity in Lancaster

This chart illustrates the average monthly humidity levels in Lancaster, 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 Lancaster is approximately 84%, 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 Lancaster

In Lancaster 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 Lancaster, you can check the information here.

Maximum UV Index Levels in Lancaster for January

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

Data source: Lancaster 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 Lancaster Compares to Other Months

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

This table compares monthly weather conditions in Lancaster, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	46 mm (1.8 inches)	84%	moderate
February Weather	-5°C (23°F)	59 mm (2.3 inches)	85%	moderate
March Weather	3°C (37°F)	61 mm (2.4 inches)	84%	moderate
April Weather	8°C (47°F)	85 mm (3.4 inches)	83%	very high
May Weather	16°C (61°F)	143 mm (5.6 inches)	75%	very high
June Weather	22°C (72°F)	135 mm (5.3 inches)	79%	very high
July Weather	24°C (76°F)	103 mm (4.0 inches)	75%	very high
August Weather	22°C (72°F)	87 mm (3.4 inches)	69%	very high
September Weather	19°C (66°F)	116 mm (4.6 inches)	74%	very high
October Weather	11°C (52°F)	124 mm (4.9 inches)	79%	moderate
November Weather	3°C (37°F)	47 mm (1.8 inches)	88%	moderate
December Weather	-1°C (30°F)	41 mm (1.6 inches)	82%	low