December Weather in Winona, United States

Last updated: June 24, 2025

In December, the average temperature in Winona, United States hovers around 5°C (42°F), with fluctuations that can see lows of -12°C (10°F) and highs reaching 25°C (78°F). Expect 76 mm (3.0 in) of precipitation over about 7 days, with humidity levels peaking at a notable 86%.

December Temperature in Winona

In December in Winona, the average temperature is 5°C (42°F). The maximum can reach 25°C (78°F), and the minimum can be as low as -12°C (10°F). Travelers should prepare for a wide range of temperatures, from chilly to pleasantly warm.

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

The chart illustrates December 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, December typically has an average temperature of 5°C (42°F), with highs reaching up to 25°C (78°F) and lows dropping to around -12°C (10°F).

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

December Precipitation in Winona

In Winona in December, the precipitation amount is 76 mm (3.0 in) over a period of 7 days.

December Precipitation Trends in Winona

The chart displays monthly precipitation patterns in Winona, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Winona, December typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 7 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Winona

In Winona in December, humidity is 86%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that penetrates your layers, making outdoor activities quite uncomfortable and prompting you to seek warmth indoors more often.

December Average Humidity in Winona

This chart illustrates the average monthly humidity levels in Winona, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Winona is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Winona

In Winona in December, 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 Winona, you can check the information here.

Maximum UV Index Levels in Winona for December

The chart shows the monthly maximum UV Index (UVI) for Winona in December, 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 December, the maximum UV index in Winona typically reaches 3, which falls under the moderate exposure category.

Data source: Winona December 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 December 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 December’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 December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	82 mm (3.2 inches)	83%	moderate
February Weather	4°C (39°F)	107 mm (4.2 inches)	81%	high
March Weather	10°C (50°F)	150 mm (5.9 inches)	80%	high
April Weather	13°C (56°F)	160 mm (6.3 inches)	80%	very high
May Weather	19°C (67°F)	180 mm (7.1 inches)	83%	very high
June Weather	24°C (75°F)	87 mm (3.4 inches)	83%	extreme
July Weather	26°C (80°F)	86 mm (3.4 inches)	76%	extreme
August Weather	25°C (77°F)	104 mm (4.1 inches)	69%	very high
September Weather	23°C (73°F)	58 mm (2.3 inches)	68%	very high
October Weather	15°C (60°F)	121 mm (4.8 inches)	72%	high
November Weather	8°C (46°F)	76 mm (3.0 inches)	83%	moderate
December Weather	5°C (42°F)	76 mm (3.0 inches)	86%	moderate