Saint Louis County (Eureka)
May
Weather in Saint Louis County, Missouri for May 2027
Your guide to Saint Louis County weather in May - trends and predictions
In general, the average temperature in Saint Louis County at the beginning of May is 20.2 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 24.3 °C by the end of May.
The climate of Saint Louis County in May is notably wet, with an average of 13 rainy days, and a total of 272.1 mm of precipitation.
Is May a good time to visit Saint Louis County? check out the best time to travel to Saint Louis County page.
✨ Is May a good time to visit Saint Louis County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
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18
Dry days
13
Rainy days
0
Snow days
23°/14°
Temperatures
16 km/h
Avg max wind
75 %
Avg humidity
Saint Louis County Weather May
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Temperatures trend during May in Saint Louis County
See the weather trend as well as the moving average line
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 |  Light rain | 20° /12° | 3.5 mm | 7 | |
| May 3 |  Heavy rain | 20° /10° | 34.4 mm | 6 | |
| May 4 |  Patchy light rain with thunder | 21° /12° | 9.8 mm | 5 | |
| May 5 | Light rain | 18° /11° | 6.8 mm | 4 | |
| May 6 |  Light rain shower | 19° /10° | 1.7 mm | 4 | |
| May 7 | Light rain | 22° /11° | 5.9 mm | 7 | |
| May 8 | Patchy light rain with thunder | 22° /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 | 23° /11° | 0 mm | 7 | |
| May 12 | Light rain | 24° /13° | 3.7 mm | 7 | |
| May 13 | Light rain | 21° /14° | 6.1 mm | 7 | |
| May 14 | Light rain shower | 23° /12° | 0.1 mm | 7 | |
| May 15 | Patchy rain possible | 26° /15° | 0.4 mm | 7 | |
| May 16 |  Moderate rain | 25° /18° | 12.9 mm | 6 | |
| May 17 | Moderate rain | 24° /16° | 9.3 mm | 7 | |
| May 18 | Moderate rain | 24° /16° | 19.9 mm | 6 | |
| May 19 | Light rain | 25° /16° | 5.5 mm | 6 | |
| May 20 | Thundery outbreaks possible | 23° /16° | 38.1 mm | 4 | |
| May 21 |  Sunny | 28° /15° | 0.4 mm | 7 | |
| May 22 |  Moderate or heavy rain with thunder | 20° /15° | 7.5 mm | 4 | |
| May 23 | Thundery outbreaks possible | 22° /13° | 1.2 mm | 5 | |
| May 24 | Patchy light rain with thunder | 24° /15° | 23.4 mm | 6 | |
| May 25 |  Overcast | 23° /14° | 0 mm | 7 | |
| May 26 | Heavy rain | 24° /14° | 37.3 mm | 7 | |
| May 27 | Light rain | 24° /16° | 7.9 mm | 6 | |
| May 28 | Sunny | 25° /15° | 0 mm | 7 | |
| May 29 | Light rain | 22° /14° | 7.1 mm | 7 | |
| May 30 | Sunny | 26° /14° | 0.2 mm | 7 | |
| May 31 | Light rain | 27° /16° | 9.2 mm | 7 | |
| Next | |||||
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 272.1 mm is expected in Saint Louis County during May, occurring over more than 13 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 16 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 13 rainy days in May with a total of 272.1 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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