August Weather in Winona, United States

Last updated: June 24, 2025

In August, the average temperature in Winona, United States hovers around 21°C (70°F), offering a pleasant climate for outdoor activities. Expect temperatures to range from a cool 10°C (51°F) at night to a warm 34°C (94°F) during the day. With 129 mm (5.1 in) of precipitation spread over about 11 days, it’s wise to carry an umbrella. Additionally, the average humidity sits around 69%, adding a bit of moisture to the air.

August Temperature in Winona

In August in Winona, the average temperature is 21°C (70°F). Maximums can reach 34°C (94°F) and minimums can be as low as 10°C (51°F). This makes it an ideal time to enjoy outdoor activities and explore the beautiful surroundings.

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 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 10°C (51°F).

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

August Precipitation in Winona

In Winona in August, the precipitation amount is 129 mm (5.1 in) spread over 11 days, indicating a wet period for the area.

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 129 mm (5.1 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Winona

In Winona in August humidity is 69%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making outdoor activities enjoyable but requiring occasional breaks for hydration and shade during your travels.

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 69%, offering insight into how humid the weather typically is during this month.

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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, 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 9, which falls under the very high exposure category.

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.
	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