St. Louis weather in July
Temperature, rain and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Fair
Best time to visit: April – May, September – October
What is the weather like in St. Louis in July?
In July, St. Louis is hot: daytime highs average 31 °C, and even at night it stays warm at around 22 °C. The sun shines for around 9 hours a day. Rain is frequent, with about 10 rainy days and 91 mm in total. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in St. Louis.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 38 min05:48 – 20:25
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 22 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 50 %on averageAll months
- Hot days
- 20 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−5America/Chicago
How the score comes together
- Temperatureweight 50 %49 %
- Sunshineweight 20 %93 %
- Few rainy daysweight 30 %54 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
St. Louis in July: quick answers
Is St. Louis hot in July?
Yes. In July, St. Louis is hot: daytime highs average 31 °C and nights stay around 22 °C. On about 20 days the thermometer climbs to 30 °C or more.
Does it rain much in St. Louis in July?
Rain is frequent, with about 10 rainy days and 91 mm in total.
St. Louis month by month
The whole year in St. LouisAll destinations: USAWhere to go in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences