St. Louis (MO)
May
Weather in St. Louis, Missouri for May 2026
Your guide to St. Louis weather in May - trends and predictions
In general, the average temperature in St. Louis at the beginning of May is 21.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 24.4 °F by the end of May.
St. Louis experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 153.6 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
5
Dry days
26
Rainy days
0
Snow days
24°/14°
Temperatures
19 km/h
Avg max wind
74 %
Avg humidity
St. Louis Weather May
Move between months or click on a day
Temperatures trend during May in St. Louis
See the weather trend as well as the moving average line
May weather in St. Louis day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 22° /12° | 7.6 mm | 6 | |
| May 2 |  Patchy rain possible | 21° /12° | 4.8 mm | 5 | |
| May 3 | Patchy rain possible | 21° /12° | 20.5 mm | 5 | |
| May 4 |  Moderate or heavy rain shower | 20° /10° | 9.2 mm | 5 | |
| May 5 | Moderate or heavy rain shower | 19° /10° | 15.6 mm | 4 | |
| May 6 | Moderate rain at times | 20° /11° | 2.6 mm | 5 | |
| May 7 |  Partly cloudy | 25° /13° | 4.1 mm | 6 | |
| May 8 | Moderate rain at times | 22° /12° | 4.3 mm | 5 | |
| May 9 | Moderate or heavy rain shower | 23° /12° | 3.4 mm | 6 | |
| May 10 |  Overcast | 23° /11° | 0.1 mm | 6 | |
| May 11 | Patchy rain possible | 24° /13° | 0.9 mm | 5 | |
| May 12 | Partly cloudy | 24° /15° | 6 mm | 6 | |
| May 13 | Partly cloudy | 24° /15° | 3.6 mm | 6 | |
| May 14 |  Cloudy | 25° /14° | 4.3 mm | 6 | |
| May 15 |  Heavy rain at times | 23° /15° | 4.3 mm | 5 | |
| May 16 | Moderate or heavy rain shower | 24° /14° | 11.3 mm | 5 | |
| May 17 | Cloudy | 24° /14° | 9.1 mm | 6 | |
| May 18 | Moderate or heavy rain shower | 25° /15° | 13.2 mm | 6 | |
| May 19 | Moderate or heavy rain shower | 26° /16° | 10 mm | 6 | |
| May 20 | Patchy rain possible | 27° /17° | 29.7 mm | 6 | |
| May 21 | Sunny | 26° /15° | 5.5 mm | 6 | |
| May 22 | Cloudy | 23° /13° | 3.1 mm | 5 | |
| May 23 | Partly cloudy | 24° /13° | 0.1 mm | 6 | |
| May 24 | Sunny | 25° /15° | 10.3 mm | 6 | |
| May 25 | Patchy rain possible | 23° /16° | 3.3 mm | 6 | |
| May 26 | Patchy rain possible | 24° /15° | 16.4 mm | 5 | |
| May 27 | Moderate or heavy rain shower | 24° /14° | 12.5 mm | 5 | |
| May 28 | Overcast | 24° /13° | 2 mm | 6 | |
| May 29 | Partly cloudy | 23° /13° | 2.3 mm | 6 | |
| May 30 | Sunny | 26° /14° | 0 mm | 7 | |
| May 31 | Partly cloudy | 27° /16° | 1.6 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for St. Louis in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St. Louis forecast closer to your planned date for the most up-to-date weather information.
Change Month
St. Louis in May - FAQ
What are the expected maximum and minimum temperatures in St. Louis during May?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in St. Louis during May?
Significant rainfall exceeding 153.6 mm is expected in St. Louis during May, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in St. Louis during May?
The average wind speed in St. Louis during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in St. Louis
Explore the daily rainfall trends and prepare for St. Louiss May weather 💧
UV exposure in St. Louis during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Quick links
More St. Louis weather pages
You are here
Where is St. Louis?Get accurate weather forecasts for St. Louis, located at latitude 38.627 and longitude -90.198. Stay updated with localized weather information tailored for St. Louis.
Found a mistake?
We appreciate your attention to details. Tell us here.