May Weather in Winona, United States

Last updated: June 24, 2025

In May, the average temperature in Winona, United States hovers around 19°C (67°F). Expect a temperature range between a minimum of 2°C (37°F) and a maximum of 32°C (91°F). During this month, precipitation levels reach 180 mm (7.1 in), spread over approximately 15 days, coupled with an average humidity of 83%.

May Temperature in Winona

In May in Winona, the average temperature is 19°C (67°F). Maximum temperatures can reach 32°C (91°F), while minimum temperatures can drop as low as 2°C (37°F). It's advisable to pack for a variety of weather conditions, ensuring comfort as you explore the diverse climate.

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

The chart illustrates May 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, May typically has an average temperature of 19°C (67°F), with highs reaching up to 32°C (91°F) and lows dropping to around 2°C (37°F).

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

May Precipitation in Winona

In Winona in May, the total precipitation amount is 180 mm (7.1 in) spread over 15 days.

May Precipitation Trends in Winona

The chart displays monthly precipitation patterns in Winona, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Winona, May typically receives around 180 mm (7.1 inches) of precipitation spread over approximately 15 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Winona

In Winona in May humidity is 83%. With an average temperature of 19°C (67°F), this humidity feels like a warm, tropical blanket wrapping around you, making traveling feel a bit sluggish and sticky, yet still inviting as long as you stay hydrated and take breaks in the shade.

May Average Humidity in Winona

This chart illustrates the average monthly humidity levels in Winona, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Winona is approximately 83%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Winona

In Winona in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Winona.

Maximum UV Index Levels in Winona for May

The chart shows the monthly maximum UV Index (UVI) for Winona in May, 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 May, the maximum UV index in Winona typically reaches 10, which falls under the very high exposure category.

Data source: Winona May 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 May 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 May’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 May’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