Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
St. Charles Weather in August
St. Charles in August averages 31°C (88°F) during the day and 20°C (68°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in St. Charles in August
Records from the past 30 years suggest around 9 days of rain, with 92 mm (3.6 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 St. Charles in August
St. Charles in August gets highs of 31°C (88°F) during the day and drops to 20°C (68°F) at night. It's usually most comfortable outside during the morning and later in the day. With overnight lows of 20°C (68°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in St. Charles in August
Enjoy a sunny month with about 268 hours of sunshine, the clear skies make St. Charles even more beautiful.Our weather planner can help you find worldwide destinations with pleasant weather during this period. September and October typically offer the best weather for St. Charles.
St. Charles Temperature in August
Min Temperature
20°C (68°F)
Max Temperature
31°C (88°F)
Chance of Rain
28%
Precipitation
92 mm (3.6 in)
Rainy days
9 days
Humidity
70% *
Sunshine
268 hours *
Percentage Sunshine
64% *
* Data from: St. Louis, the United States of America (30 KM, 18 Miles).
St. Charles Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in St. Charles - and find the best time to visit.
Best Places in the United States of America in August
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in St. Charles 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 St. Charles in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
St. Charles 3-Day Forecast
More climate data for St. Charles
Temperature Rainfall Sunshine Humidity
See the full St. Charles climate overview or explore weather in the United States of America.
Popular in August
Where to go in August - average daytime high across popular destinations.
Kissimmee
33°C (91°F) Orlando33°C (91°F) Miami Beach32°C (90°F) Destin32°C (90°F) New York City
29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.