Clayton Weather in September

September in Clayton typically sees daytime highs of 27°C (81°F) and nighttime lows of 16°C (61°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Clayton in September

You can expect rain on roughly 9 days based on historical data, averaging 107 mm (4.2 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Clayton in September

Daytime highs in Clayton in September reach 27°C (81°F), with nights around 16°C (61°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Clayton in September

The days are predominantly sunny, with an estimated total of around 235 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If you prefer enjoying temperate temperatures and rain-free days, October typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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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 Clayton's climate page.

Clayton Temperature in September

Min Temperature 16°C (61°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 31%  

Precipitation 107 mm (4.2 in)  

Rainy days 9 days  

Humidity 71% *  

Sunshine 235 hours *  

Percentage Sunshine 63% *  

* Data from: St. Louis, the United States of America (11 KM, 6 Miles).

What to Wear in Clayton in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Clayton in September

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

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 Clayton's climate page.

More climate data for Clayton

Temperature Rainfall Sunshine Humidity

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