Onalaska Weather in September

Onalaska in September averages 23°C (73°F) during the day and 12°C (54°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Onalaska in September

You can expect rain on around 10 days based on historical patterns, with 97 mm (3.8 in) average for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Onalaska in September

September is a good time to be in Onalaska. Days are perfect, reaching 23°C (73°F), with nights around 12°C (54°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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• January
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• October
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For a detailed overview over the year and the best time to visit the United States of America, check out our Onalaska's climate page.

Onalaska Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 33%  

Precipitation 97 mm (3.8 in)  

Rainy days 10 days  

Humidity 76% *  

* Data from: La Crosse, the United States of America (9 KM, 5 Miles).

What to Wear in Onalaska in September

For Onalaska in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.

What To Do in Onalaska in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Onalaska's climate page.

More climate data for Onalaska

Temperature Rainfall Humidity

See the full Onalaska climate overview or explore weather in the United States of America.