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January Weather in Williamsville, United States

Last updated: June 24, 2025

In January, the average temperature in Williamsville, United States hovers around -2°C (29°F). However, temperatures can vary dramatically, with a minimum reaching as low as -27°C (-16°F) and a maximum soaring to 17°C (63°F). Expect about 69 mm (2.7 in) of precipitation spread over 8 days, coupled with an average humidity of 84%, creating a chilly yet intriguing climate.

January Temperature in Williamsville

In January in Williamsville, the average temperature is -2°C (29°F), with maximums reaching 17°C (63°F) and minimums plummeting to as low as -27°C (-16°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Williamsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williamsville, January typically has an average temperature of -2°C (29°F), with highs reaching up to 17°C (63°F) and lows dropping to around -27°C (-16°F).
JanFebMarAprMayJunJulAugSepOctNovDec293143526575777471574236
Data source: Temperature data for Williamsville 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 Williamsville

In Williamsville in January, the precipitation amount is 69 mm (2.7 in) that falls over a period of 8 days.

January Precipitation Trends in Williamsville

The chart displays monthly precipitation patterns in Williamsville, 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 Williamsville, January typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec696913012814312411687641116852
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Williamsville

In Williamsville in January, humidity is 84%. With an average temperature of -2°C (29°F), this humidity feels like an icy blanket that clings to your skin, making it difficult to stay warm and comfortable while traveling.

January Average Humidity in Williamsville

This chart illustrates the average monthly humidity levels in Williamsville, 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 Williamsville is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Williamsville

In Williamsville 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 Williamsville, you can check the information here.

Maximum UV Index Levels in Williamsville for January

The chart shows the monthly maximum UV Index (UVI) for Williamsville 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 Williamsville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111198643
Data source: Williamsville 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 Williamsville Compares to Other Months

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

This table compares monthly weather conditions in Williamsville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)69 mm (2.7 inches)84%moderate
February Weather0°C (32°F)69 mm (2.7 inches)82%moderate
March Weather6°C (44°F)129 mm (5.1 inches)84%high
April Weather11°C (53°F)128 mm (5.1 inches)83%very high
May Weather18°C (66°F)143 mm (5.6 inches)80%very high
June Weather24°C (75°F)124 mm (4.9 inches)83%extreme
July Weather25°C (77°F)116 mm (4.6 inches)82%extreme
August Weather23°C (74°F)87 mm (3.4 inches)82%very high
September Weather22°C (71°F)64 mm (2.5 inches)79%very high
October Weather14°C (58°F)111 mm (4.4 inches)79%high
November Weather5°C (42°F)68 mm (2.7 inches)88%moderate
December Weather2°C (36°F)52 mm (2.1 inches)87%moderate

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