Saint Louis County (Eureka)
May
Weather in Saint Louis County, Missouri for May 2026
Your guide to Saint Louis County weather in May - trends and predictions
Until now, May 2026 in Saint Louis County is slightly cooler than the historical average by -1.5 °F.
The forecast for the coming days of May 2026 predicts a temperature of 25.8 °F , which is warmer than usual.
In general, the average temperature in Saint Louis County at the beginning of May is 20.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25.7 °F by the end of May.
Saint Louis County experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 338.3 mm.
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Temperatures
Rain 🌧️
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10
Dry days
21
Rainy days
0
Snow days
23°/14°
Temperatures
17 km/h
Avg max wind
76 %
Avg humidity
Saint Louis County Weather May
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Temperatures trend during May in Saint Louis County
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May weather in Saint Louis County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Thundery outbreaks possible | 22° /12° | 15.5 mm | 7 | |
| May 2 |  Patchy rain possible | 20° /11° | 3.5 mm | 7 | |
| May 3 | Patchy rain possible | 20° /9° | 34.4 mm | 6 | |
| May 4 |  Patchy light rain with thunder | 21° /12° | 9.8 mm | 5 | |
| May 5 | Patchy rain possible | 18° /10° | 6.8 mm | 4 | |
| May 6 | Light rain shower | 20° /10° | 1.7 mm | 4 | |
| May 7 |  Overcast | 22° /11° | 5.9 mm | 7 | |
| May 8 | Patchy light rain with thunder | 23° /11° | 3.6 mm | 7 | |
| May 9 | Patchy rain possible | 23° /11° | 0.8 mm | 7 | |
| May 10 | Patchy rain possible | 20° /9° | 0.1 mm | 5 | |
| May 11 |  Partly cloudy | 24° /10° | 0 mm | 7 | |
| May 12 | Partly cloudy | 25° /12° | 3.7 mm | 7 | |
| May 13 | Light rain shower | 22° /13° | 6.1 mm | 7 | |
| May 14 |  Sunny | 23° /10° | 0 mm | 8.4 | |
| May 15 | Patchy rain possible | 29° /12° | 2.7 mm | 0.3 | |
| May 16 | Sunny | 31° /18° | 0 mm | 6 | |
| May 17 | Sunny | 32° /18° | 0 mm | 6 | |
| May 18 | Patchy rain possible | 27° /18° | 4.6 mm | 5 | |
| May 19 | Patchy rain possible | 23° /16° | 1.6 mm | 4 | |
| May 20 | Patchy rain possible | 18° /15° | 4.5 mm | 4 | |
| May 21 |  Moderate rain | 25° /15° | 15.1 mm | 4 | |
| May 22 | Moderate rain | 16° /13° | 7.2 mm | 3 | |
| May 23 | Sunny | 21° /11° | 0 mm | 5 | |
| May 24 | Sunny | 26° /10° | 0 mm | 5 | |
| May 25 | Partly cloudy | 26° /16° | 0 mm | 6 | |
| May 26 | Patchy rain possible | 32° /20° | 0.4 mm | 6 | |
| May 27 | Partly cloudy | 32° /20° | 0 mm | 6 | |
| May 28 | Sunny | 23° /14° | 0 mm | 6 | |
| May 29 | Partly cloudy | 20° /12° | 10.6 mm | 5 | |
| May 30 | Sunny | 23° /12° | 0 mm | 6 | |
| May 31 |  Light rain | 24° /15° | 11.1 mm | 6 | |
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Important Notice
Our weather forecast for Saint Louis County 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 Saint Louis County forecast closer to your planned date for the most up-to-date weather information.
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Saint Louis County in May - FAQ
What are the expected maximum and minimum temperatures in Saint Louis County 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 Saint Louis County during May?
Significant rainfall exceeding 338.3 mm is expected in Saint Louis County during May, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Saint Louis County during May?
The average wind speed in Saint Louis County during May is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Saint Louis County
Explore the daily rainfall trends and prepare for Saint Louis Countys May weather 💧
Typically, Saint Louis County has 21 rainy days in May with a total of 338.3 mm of rainfall.
UV exposure in Saint Louis County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Saint Louis County?Get accurate weather forecasts for Saint Louis County, located at latitude 38.503 and longitude -90.628. Stay updated with localized weather information tailored for Saint Louis County.
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