Arnold Weather in August

Thinking of visiting Arnold in August? Expect very high temperatures reaching 31°C (88°F) during the day, dropping to 20°C (68°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Arnold in August

Typically, about 8 days will experience rainfall, with an average of 87 mm (3.4 in) 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 Arnold in August

Daytime highs in Arnold in August reach 31°C (88°F), with nights around 20°C (68°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. Nights cool down to 20°C (68°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Arnold in August

The days are predominantly sunny, with an estimated total of around 268 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. October typically offers the best weather for Arnold.

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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 Arnold's climate page.

Arnold Temperature in August

Min Temperature 20°C (68°F)  

Max Temperature 31°C (88°F)  

Chance of Rain 27%  

Precipitation 87 mm (3.4 in)  

Rainy days 8 days  

Humidity 70% *  

Sunshine 268 hours *  

Percentage Sunshine 64% *  

* Data from: St. Louis, the United States of America (26 KM, 16 Miles).

What to Wear in Arnold in August

Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Arnold in August

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

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 Arnold's climate page.

More climate data for Arnold

Temperature Rainfall Sunshine Humidity

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