St. Louis (MO)
May
Weather in St. Louis, Missouri for May 2027
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 20.1 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 24.5 °C by the end of May.
The climate of St. Louis in May is notably wet, with an average of 14 rainy days, and a total of 210.5 mm of precipitation.
Is May a good time to visit St. Louis? check out the best time to travel to St. Louis page.
✨ Is May a good time to visit St. Louis? – Ask the AI Weatherman
Temperatures
Rain 🌧️
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17
Dry days
14
Rainy days
0
Snow days
23°/14°
Temperatures
18 km/h
Avg max wind
75 %
Avg humidity
St. Louis Weather May
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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
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Light rain | 21° /12° | 6.5 mm | 6 | |
| May 2 | Light rain | 19° /12° | 4.5 mm | 5 | |
| May 3 |  Moderate rain | 21° /11° | 17.7 mm | 6 | |
| May 4 |  Moderate or heavy rain shower | 20° /11° | 9.4 mm | 5 | |
| May 5 | Moderate rain | 18° /10° | 16.4 mm | 4 | |
| May 6 | Light rain | 19° /11° | 2.5 mm | 5 | |
| May 7 | Light rain | 23° /12° | 3.4 mm | 7 | |
| May 8 | Light rain | 22° /12° | 5.1 mm | 6 | |
| May 9 | Light rain | 23° /12° | 3.4 mm | 6 | |
| May 10 |  Overcast | 22° /12° | 0.3 mm | 6 | |
| May 11 |  Patchy rain possible | 23° /13° | 0.8 mm | 6 | |
| May 12 | Light rain | 24° /14° | 5 mm | 7 | |
| May 13 | Light rain | 23° /15° | 3 mm | 6 | |
| May 14 | Light rain | 24° /14° | 3.6 mm | 6 | |
| May 15 |  Heavy rain at times | 23° /15° | 5.8 mm | 6 | |
| May 16 | Moderate rain | 23° /16° | 13.2 mm | 6 | |
| May 17 | Light rain | 25° /15° | 7.6 mm | 6 | |
| May 18 | Moderate rain | 25° /17° | 17.5 mm | 6 | |
| May 19 | Moderate or heavy rain shower | 26° /16° | 9 mm | 6 | |
| May 20 | Moderate rain | 25° /16° | 24.9 mm | 6 | |
| May 21 | Light rain | 25° /15° | 4.6 mm | 7 | |
| May 22 | Light rain | 22° /14° | 2.7 mm | 5 | |
| May 23 |  Partly cloudy | 24° /14° | 0.2 mm | 6 | |
| May 24 | Moderate or heavy rain shower | 25° /16° | 9.5 mm | 6 | |
| May 25 | Light rain | 24° /16° | 2.8 mm | 7 | |
| May 26 | Moderate rain | 24° /15° | 14.2 mm | 6 | |
| May 27 | Moderate rain | 24° /15° | 11.5 mm | 6 | |
| May 28 | Patchy rain possible | 24° /14° | 1.7 mm | 7 | |
| May 29 | Patchy rain possible | 23° /14° | 1.9 mm | 7 | |
| May 30 |  Sunny | 26° /15° | 0.1 mm | 7 | |
| May 31 | Patchy rain possible | 27° /17° | 1.7 mm | 7 | |
| 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 23° 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 210.5 mm is expected in St. Louis during May, occurring over more than 14 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 18 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 💧
Typically, St. Louis has 14 rainy days in May with a total of 210.5 mm of rainfall.
UV exposure in St. Louis during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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