St. Louis Weather in August

August in St. Louis averages 31°C (88°F) during the day and 20°C (68°F) at night. Quite a bit of rainfall is typical this month, with around 81 mm (3.2 in) on average. An umbrella is a good idea.

Rainfall in St. Louis in August

Looking at the last 30 years, the data shows about 8 days with rain, averaging 81 mm (3.2 in) 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. Louis in August

August in St. Louis sees highs of 31°C (88°F) and lows of 20°C (68°F) overnight. Mornings and evenings are often more comfortable than the peak afternoon hours. Nights are mild at around 20°C (68°F), which is comfortable for most people.

Sunshine in St. Louis in August

Expect sunny days throughout the month, with an estimated 268 hours of sunshine. This makes it a pleasant time to visit St. Louis.

If you prefer dry days with pleasant temperatures, 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.