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January Weather in West Lafayette, United States

Last updated: June 24, 2025

In West Lafayette, United States, the average temperature in January hovers around -1°C (31°F). Temperatures can vary significantly, with a minimum of -20°C (-4°F) and a maximum of 21°C (70°F). Expect about 92 mm (3.6 in) of precipitation spread over 11 days, and don't forget to brace for high humidity levels averaging 88%. Stay prepared for a range of weather this month!

January Temperature in West Lafayette

In January in West Lafayette, the average temperature is -1°C (31°F). Maximum temperatures can reach 21°C (70°F) while minimums can drop as low as -20°C (-4°F). This wide temperature range makes it essential for travelers to pack accordingly and be prepared for both mild and frigid weather conditions.

January Weather in West Lafayette: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in West Lafayette, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In West Lafayette, January typically has an average temperature of -1°C (31°F), with highs reaching up to 21°C (70°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec313542526371757368574236
Data source: Temperature data for West Lafayette 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 West Lafayette

In West Lafayette in January, the precipitation amount is 92 mm (3.6 in) spread over 11 days.

January Precipitation Trends in West Lafayette

The chart displays monthly precipitation patterns in West Lafayette, 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 West Lafayette, January typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec921131091291311411149310710799102
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in West Lafayette

In West Lafayette in January, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.

January Average Humidity in West Lafayette

This chart illustrates the average monthly humidity levels in West Lafayette, 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 West Lafayette is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in West Lafayette

In West Lafayette 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 West Lafayette, you can check the information here.

Maximum UV Index Levels in West Lafayette for January

The chart shows the monthly maximum UV Index (UVI) for West Lafayette 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 West Lafayette typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: West Lafayette 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 West Lafayette Compares to Other Months

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

This table compares monthly weather conditions in West Lafayette, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)92 mm (3.6 inches)88%moderate
February Weather1°C (35°F)113 mm (4.5 inches)88%moderate
March Weather6°C (42°F)109 mm (4.3 inches)87%high
April Weather11°C (52°F)129 mm (5.1 inches)87%very high
May Weather17°C (63°F)131 mm (5.1 inches)81%very high
June Weather22°C (71°F)141 mm (5.5 inches)83%very high
July Weather24°C (76°F)114 mm (4.5 inches)82%very high
August Weather23°C (73°F)93 mm (3.6 inches)76%very high
September Weather20°C (69°F)107 mm (4.2 inches)77%very high
October Weather14°C (58°F)107 mm (4.2 inches)82%high
November Weather6°C (42°F)99 mm (3.9 inches)89%moderate
December Weather2°C (37°F)101 mm (4.0 inches)86%low

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