January Weather in West Lafayette, United States

Last updated: June 24, 2025

In January, the average temperature in West Lafayette, United States hovers around -2°C (29°F), with extremes that can plunge to a chilling -28°C (-17°F) and peak at a surprisingly warm 18°C (65°F). Expect 74 mm (2.9 in) of precipitation spread over 8 days, contributing to an average humidity of 85% that adds a crisp chill to the air.

January Temperature in West Lafayette

In January in West Lafayette, the average temperature is -2°C (29°F). The maximum can reach 18°C (65°F) and the minimum can be as low as -28°C (-17°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort during this unpredictable weather.

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 -2°C (29°F), with highs reaching up to 18°C (65°F) and lows dropping to around -28°C (-17°F).

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

January Precipitation in West Lafayette

In West Lafayette in January, the precipitation amount is 74 mm (2.9 in) over a period of 8 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 74 mm (2.9 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 West Lafayette

In West Lafayette in January, humidity is 85%. With an average temperature of -2°C (29°F), this humidity feels like a chilling, damp blanket that clings to your skin, making travel uncomfortable and often prompting an urgent search for warmth and shelter.

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 85%, 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 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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	74 mm (2.9 inches)	85%	moderate
February Weather	-1°C (31°F)	77 mm (3.0 inches)	85%	moderate
March Weather	5°C (42°F)	106 mm (4.2 inches)	86%	high
April Weather	11°C (52°F)	97 mm (3.8 inches)	87%	very high
May Weather	18°C (64°F)	152 mm (6.0 inches)	81%	very high
June Weather	23°C (74°F)	100 mm (3.9 inches)	82%	extreme
July Weather	25°C (77°F)	99 mm (3.9 inches)	81%	very high
August Weather	23°C (74°F)	101 mm (4.0 inches)	79%	very high
September Weather	21°C (70°F)	65 mm (2.6 inches)	78%	very high
October Weather	14°C (57°F)	112 mm (4.4 inches)	81%	high
November Weather	5°C (41°F)	75 mm (3.0 inches)	89%	moderate
December Weather	2°C (35°F)	62 mm (2.4 inches)	86%	low