Saint Louis Weather in July

The climate in Saint Louis during July can be summarized as hot and a little damp.

July is in the summer in Saint Louis and is typically the warmest month of the year. Daytime maximum temperatures average around a warm 32°C (89°F), whilst at night 21°C (69°F) is normal.

On average July is the 3rd wettest month of the year in Saint Louis with around 95mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.8 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Saint Louis in July 2025.