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January Weather in Lancaster, United States

Last updated: June 24, 2025

In January, the average temperature in Lancaster, United States hovers around -9°C (16°F), with temperatures dipping as low as -31°C (-24°F) and peaking at a mild 12°C (53°F). This chilly month also brings about 86 mm (3.4 in) of precipitation spread over 12 days, resulting in an average humidity level of 91%. Bundle up and prepare for a frosty experience!

January Temperature in Lancaster

In January in Lancaster, the average temperature is -9°C (16°F). The maximum can reach 12°C (53°F), and the minimum can drop as low as -31°C (-24°F). It's essential to prepare for extreme cold and fluctuating temperatures while traveling during this time.

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 -9°C (16°F), with highs reaching up to 12°C (53°F) and lows dropping to around -31°C (-24°F).
JanFebMarAprMayJunJulAugSepOctNovDec161926395261666558463121
Data source: Temperature data for Lancaster generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Lancaster

In Lancaster in January, the precipitation amount is 86 mm (3.4 in) over a span of 12 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 86 mm (3.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec87857512099100107926413011297
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Lancaster

In Lancaster in January humidity is 91%. With an average temperature of -9°C (16°F), this humidity feels like a heavy veil wrapping around you, making outdoor exploration quite challenging as you navigate through the chilly air that seems to cling to your skin.

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 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
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 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 Lancaster, you can visit Hourly UV Index in Lancaster.

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 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2468910997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)86 mm (3.4 inches)91%low
February Weather-7°C (19°F)85 mm (3.4 inches)89%moderate
March Weather-3°C (27°F)75 mm (2.9 inches)85%high
April Weather4°C (40°F)120 mm (4.7 inches)84%very high
May Weather11°C (53°F)99 mm (3.9 inches)78%very high
June Weather16°C (62°F)100 mm (3.9 inches)72%very high
July Weather19°C (67°F)107 mm (4.2 inches)75%very high
August Weather18°C (65°F)92 mm (3.6 inches)74%very high
September Weather14°C (58°F)64 mm (2.5 inches)77%high
October Weather8°C (46°F)130 mm (5.1 inches)85%moderate
November Weather0°C (32°F)112 mm (4.4 inches)86%moderate
December Weather-6°C (22°F)97 mm (3.8 inches)85%low

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