O'Fallon Weather in October

Thinking of visiting O'Fallon in October? Expect pleasant temperatures reaching 21°C (70°F) during the day, dropping to 8°C (46°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in O'Fallon in October

Climate statistics over the past 30 years suggest around 9 days of rain, with 86 mm (3.4 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in O'Fallon in October

Weather in O'Fallon is at its perfect in October. Highs reach 21°C (70°F), while nights settle around 8°C (46°F). Conditions are often most pleasant around the middle of the day. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in O'Fallon in October

The month enjoys around 206 hours of sunshine, creating mostly sunny days with good weather conditions.

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

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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 8°C (46°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 30%  

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 (25 KM, 15 Miles).

What to Wear in O'Fallon in October

For O'Fallon in October, 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

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.