St. Louis
May
Weather in St. Louis for May 2025
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 23.4 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 25.6 °F by the end of May.
St. Louis sees moderate rainfall in May, averaging 7 rainy days.
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24
Dry days
7
Rainy days
0
Snow days
27°/13°
Temperatures
17 km/h
Avg max wind
72 %
Avg humidity
St. Louis in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  22° | 2  22° | 3 22° | 4 24° | |||
| 5  20° | 6 24° | 7 30° | 8  29° | 9 24° | 10 22° | 11 22° |
| 12 25° | 13  24° | 14 26° | 15 21° | 16 21° | 17  23° | 18  26° |
| 19 27° | 20 25° | 21 27° | 22 26° | 23 26° | 24 29° | 25 25° |
| 26 28° | 27 25° | 28 24° | 29 25° | 30 27° | 31 25° |
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Temperatures trend during May in St. Louis
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Partly cloudy | 22° /11° | 2.8 mm | 6 | |
| May 2 | Sunny | 22° /12° | 3.1 mm | 6 | |
| May 3 | Sunny | 22° /11° | 0.6 mm | 6 | |
| May 4 | Partly cloudy | 24° /11° | 3 mm | 6 | |
| May 5 | Moderate or heavy rain shower | 20° /12° | 22.8 mm | 5 | |
| May 6 | Moderate or heavy rain shower | 24° /14° | 2.5 mm | 6 | |
| May 7 | Moderate or heavy rain shower | 30° /18° | 10.2 mm | 7 | |
| May 8 | Patchy rain possible | 29° /15° | 8.6 mm | 6 | |
| May 9 | Sunny | 24° /13° | 0 mm | 6 | |
| May 10 | Sunny | 22° /12° | 0.2 mm | 6 | |
| May 11 | Patchy rain possible | 22° /13° | 2 mm | 6 | |
| May 12 | Patchy rain possible | 25° /15° | 3 mm | 7 | |
| May 13 | Heavy rain at times | 24° /17° | 8.9 mm | 5 | |
| May 14 | Moderate or heavy rain shower | 26° /15° | 10 mm | 6 | |
| May 15 | Moderate or heavy rain shower | 21° /14° | 6.3 mm | 5 | |
| May 16 | Moderate or heavy rain shower | 21° /14° | 23.5 mm | 5 | |
| May 17 | Cloudy | 23° /14° | 10.5 mm | 6 | |
| May 18 | Overcast | 26° /15° | 0 mm | 6 | |
| May 19 | Moderate or heavy rain shower | 27° /16° | 3.6 mm | 7 | |
| May 20 | Sunny | 25° /15° | 0.9 mm | 6 | |
| May 21 | Partly cloudy | 27° /15° | 1 mm | 7 | |
| May 22 | Sunny | 26° /15° | 7 mm | 6 | |
| May 23 | Partly cloudy | 26° /14° | 0.2 mm | 6 | |
| May 24 | Patchy rain possible | 29° /17° | 3.2 mm | 6 | |
| May 25 | Partly cloudy | 25° /15° | 0 mm | 7 | |
| May 26 | Sunny | 28° /15° | 1 mm | 7 | |
| May 27 | Sunny | 25° /15° | 0.2 mm | 6 | |
| May 28 | Partly cloudy | 24° /13° | 0 mm | 7 | |
| May 29 | Partly cloudy | 25° /14° | 0 mm | 7 | |
| May 30 | Partly cloudy | 27° /14° | 0 mm | 7 | |
| May 31 | Partly cloudy | 25° /16° | 3.9 mm | 6 | |
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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.
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 27° and cooler nights around 13°. 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 267.3 mm is expected in St. Louis during May, occurring over more than 7 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 17 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 ☀️
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