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May Weather in Winona, United States

Last updated: June 24, 2025

In Winona, United States, the average temperature in May is a pleasant 23°C (74°F), making it an ideal time for outdoor activities. However, be prepared for a temperature range that can dip as low as 8°C (47°F) or soar up to 35°C (96°F). Expect about 160 mm (6.3 in) of precipitation spread over 12 days, so a light raincoat might come in handy. Additionally, the average humidity is a high 81%, contributing to the tropical feel of the season.

May Temperature in Winona

In May in Winona, the average temperature is 23°C (74°F). The maximum can reach 35°C (96°F), and the minimum can drop as low as 8°C (47°F). This variety in temperatures makes Winona a suitable destination for travelers seeking both warm days and cooler evenings.

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 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec485060657481848479685752
Data source: Temperature data for Winona 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.

May Precipitation in Winona

In Winona in May, the precipitation amount is 160 mm (6.3 in) over a span of 12 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 160 mm (6.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec11015012914516010986769810469120
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Winona

In Winona in May, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

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 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
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 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
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.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)110 mm (4.3 inches)80%moderate
February Weather10°C (50°F)150 mm (5.9 inches)79%high
March Weather16°C (61°F)129 mm (5.1 inches)78%very high
April Weather18°C (65°F)145 mm (5.7 inches)78%very high
May Weather23°C (74°F)160 mm (6.3 inches)81%extreme
June Weather27°C (81°F)109 mm (4.3 inches)78%extreme
July Weather29°C (84°F)86 mm (3.4 inches)73%extreme
August Weather29°C (84°F)75 mm (3.0 inches)66%extreme
September Weather26°C (79°F)98 mm (3.9 inches)65%very high
October Weather20°C (69°F)104 mm (4.1 inches)72%very high
November Weather14°C (57°F)69 mm (2.7 inches)82%high
December Weather11°C (53°F)120 mm (4.7 inches)87%moderate

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