January Weather in Winona, United States

Last updated: June 24, 2025

In Winona, United States, the average temperature in January hovers around -8°C (18°F). However, be prepared for extremes, as it can plunge to a chilly -33°C (-27°F) or occasionally rise to a mild 9°C (49°F). During this month, expect about 36 mm (1.4 in) of precipitation spread over 6 days, with an average humidity level of 84%.

January Temperature in Winona

In January in Winona, the average temperature is -8°C (18°F), with maximums reaching 9°C (49°F) and minimums dropping as low as -33°C (-27°F). Travelers should be prepared for chilly conditions, with a significant range in temperatures, so dressing in layers is essential.

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

The chart illustrates January temperature patterns in Winona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Winona, January typically has an average temperature of -8°C (18°F), with highs reaching up to 9°C (49°F) and lows dropping to around -33°C (-27°F).

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

January Precipitation in Winona

In Winona in January, the total precipitation amount is 36 mm (1.4 in), which falls over the course of 6 days.

January Precipitation Trends in Winona

The chart displays monthly precipitation patterns in Winona, 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 Winona, January typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 6 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 Winona

In Winona in January humidity is 84%. With an average temperature of -8°C (18°F), this humidity feels like a biting chill that seeps into your bones, making outdoor exploration challenging and requiring extra layers for comfort.

January Average Humidity in Winona

This chart illustrates the average monthly humidity levels in Winona, 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 Winona 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 Winona

In Winona 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 Winona, you can visit Hourly UV Index in Winona.

Maximum UV Index Levels in Winona for January

The chart shows the monthly maximum UV Index (UVI) for Winona 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 Winona typically reaches 2, which falls under the low exposure category.

Data source: Winona 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 Winona Compares to Other Months

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

This table compares monthly weather conditions in Winona, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	36 mm (1.4 inches)	84%	low
February Weather	-7°C (20°F)	49 mm (1.9 inches)	85%	moderate
March Weather	1°C (35°F)	57 mm (2.2 inches)	84%	moderate
April Weather	7°C (44°F)	86 mm (3.4 inches)	83%	very high
May Weather	15°C (59°F)	153 mm (6.0 inches)	75%	very high
June Weather	21°C (71°F)	157 mm (6.2 inches)	79%	very high
July Weather	23°C (74°F)	106 mm (4.2 inches)	75%	very high
August Weather	21°C (70°F)	129 mm (5.1 inches)	69%	very high
September Weather	18°C (64°F)	115 mm (4.5 inches)	74%	very high
October Weather	9°C (49°F)	121 mm (4.8 inches)	79%	moderate
November Weather	1°C (34°F)	53 mm (2.1 inches)	88%	moderate
December Weather	-4°C (26°F)	43 mm (1.7 inches)	82%	low