St. Louis weather in May
Temperature, rain and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Good
Best time to visit: April – May, September – October
What is the weather like in St. Louis in May?
In May, St. Louis is warm: daytime highs average 24 °C, and nights cool down to about 15 °C. The sun shines for around 7 hours a day. Rain is frequent, with about 14 rainy days and 126 mm in total. All in all, May is a good month for a holiday in St. Louis.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 14 h 15 min05:50 – 20:04
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 6 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 60 %on averageAll months
- Hot days
- 3 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 %100 %
- Sunshineweight 20 %67 %
- Few rainy daysweight 30 %31 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
St. Louis in May: quick answers
Is St. Louis hot in May?
Warm rather than hot: in May, daytime highs in St. Louis average 24 °C and nights cool to about 15 °C. On about 3 days the thermometer climbs to 30 °C or more.
Does it rain much in St. Louis in May?
Rain is frequent, with about 14 rainy days and 126 mm in total.
St. Louis month by month
The whole year in St. LouisAll destinations: USAWhere to go in May
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