Normal weather for Onalaska in August
It's warm in August in Onalaska with an average temperature of 29°C. Temperatures this month range from a low of 27°C to a high of 30°C. At night, you can expect temperatures between 16°C and 19°C.
In August, there is an average of 111 mm of precipitation, spread over 13 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Onalaska in August |
London | ||
|---|---|---|---|
 Average Temperature |
29°C | 22°C | |
 High Temp |
30°C | 24°C | |
| Low Temp |
27°C | 19°C | |
 Total Precipitation |
111 mm | 60 mm | |
| Rainy Days |
13 days | 10 days | |
Start of August
The month of August starts in Onalaska with hot temperatures, averaging around 30°C during the day and nights close to 19°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. In the evening and morning, a T-shirt, light trousers or skirt, and a light jacket are recommended.
Mid-August
By mid-August, the average daytime temperature drops to around 29°C, with nights close to 19°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. In the evening and morning, a T-shirt, light trousers or skirt, and a light jacket are recommended.
End of August
By the end of August, the average daytime temperature in Onalaska will be around 28°C, with nights close to 18°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
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UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is August a good time to visit Onalaska?
After some sun? Then August isn’t the best time to be in Onalaska. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Onalaska in August
With 40°C, Onalaska hit the highest temperature in the last 10 years in August 2023. The lowest daytime temperature in this month was 17°C in 2015. The extreme night temperatures ranged from a low of 10°C to a high of 27°C.
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Daily Temperature in August in Onalaska
This chart shows the average daily temperatures, both day and night, for each day in August in Onalaska, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in Onalaska
The chart below shows the average daily precipitation in August for Onalaska, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 13 days of rain in Onalaska.
Daily UV Index in August in Onalaska
This chart shows the average daily UV index in August in Onalaska, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Onalaska Over the Years
This chart shows the average temperature in August in Onalaska, measured in degrees Celsius, over the past years.
Total Precipitation in August in Onalaska Over the Years
This chart shows the average precipitation in August in Onalaska, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for Onalaska
Click on a specific day in August for detailed info on the typical weather on that day in Onalaska. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Onalaska
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Average Weather in Onalaska by Month
Click on a month below to see detailed weather info for Onalaska. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
