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August Weather in Winona, United States

Last updated: June 24, 2025

In August, the average temperature in Winona, United States hovers around 29°C (84°F), providing a warm and inviting climate. Expect minimums of 18°C (65°F) and maximums reaching 39°C (103°F), perfect for both lounging and exploring. With an average humidity of 66%, the air carries a pleasant warmth, while 75 mm (3.0 in) of precipitation over 9 days ensures the landscape remains lush and vibrant. Embrace the beauty of Winona this August!

August Temperature in Winona

In August in Winona, the average temperature is 29°C (84°F). Maximums can reach 39°C (103°F) and minimums can be as low as 18°C (65°F). Be prepared for warm days and mild evenings, making it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates August 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, August typically has an average temperature of 29°C (84°F), with highs reaching up to 39°C (103°F) and lows dropping to around 18°C (65°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.

August Precipitation in Winona

In Winona in August, the precipitation amount is 75 mm (3.0 in) distributed over 9 days.

August Precipitation Trends in Winona

The chart displays monthly precipitation patterns in Winona, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Winona, August typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec11015012914516010986769810469120
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Winona

In Winona in August, humidity is 66%. With an average temperature of 29°C (84°F), this humidity feels like a warm and sticky embrace that can make outdoor activities quite uncomfortable, often prompting travelers to seek shade or relief in air-conditioned spaces.

August Average Humidity in Winona

This chart illustrates the average monthly humidity levels in Winona, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Winona is approximately 66%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Winona

In Winona in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Winona in August, 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 August, the maximum UV index in Winona typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Winona August 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 August 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 August’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 August’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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