O'Fallon Weather in October

In O'Fallon, October brings pleasant daytime temperatures around 20°C (68°F), with nights cooling to 7°C (45°F). Expect quite a bit of rainfall this month.

Rainfall in O'Fallon in October

Past climate data indicates that roughly 9 days will see rain, totalling around 86 mm (3.4 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in O'Fallon in October

Weather in O'Fallon is at its excellent in October. Highs reach 20°C (68°F), while nights settle around 7°C (45°F). Conditions are often most pleasant around the middle of the day. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in O'Fallon in October

With approximately 206 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

If you favor pleasant temperatures and minimal rainfall, October is one of the best months to visit O'Fallon.

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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 O'Fallon's climate page.

O'Fallon Temperature in October

Min Temperature 7°C (45°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 29%  

Precipitation 86 mm (3.4 in)  

Rainy days 9 days  

Humidity 68% *  

Sunshine 206 hours *  

Percentage Sunshine 60% *  

* Data from: St. Louis, the United States of America (48 KM, 29 Miles).

What to Wear in O'Fallon in October

Pleasant temperatures in October mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in O'Fallon in October

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

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

4/10

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 O'Fallon's climate page.

More climate data for O'Fallon

Temperature Rainfall Sunshine Humidity

See the full O'Fallon climate overview or explore weather in the United States of America.