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Missouri United States

Weather in Saint Louis County for May 2025

Your guide to Saint Louis County weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Saint Louis County at the beginning of May is 25 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.3 °F by the end of May.

  • Rain 🌧️

  • Saint Louis County in May brings notable rainfall, with an average of 20 rainy days and a total precipitation of 148.3 mm.

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Average dry days
11
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/14°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
77 %
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 day by day

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Date Weather Temperatures Rain UV More
May 1 Thundery outbreaks possible
Thundery outbreaks possible
29° /14° 5.9 mm 6
May 2 Patchy rain possible
Patchy rain possible
27° /16° 10.4 mm 6
May 3 Patchy rain possible
Patchy rain possible
22° /16° 1.3 mm 5
May 4 Patchy light rain with thunder
Patchy light rain with thunder
25° /14° 7 mm 6
May 5 Patchy rain possible
Patchy rain possible
21° /13° 4.1 mm 5
May 6 Light rain shower
Light rain shower
23° /15° 3 mm 5
May 7 Light rain shower
Light rain shower
28° /16° 17.8 mm 6
May 8 Patchy light rain with thunder
Patchy light rain with thunder
29° /12° 3.8 mm 6
May 9 Patchy rain possible
Patchy rain possible
21° /12° 0.1 mm 5
May 10 Patchy rain possible
Patchy rain possible
19° /9° 0.3 mm 4
May 11 Partly cloudy
Partly cloudy
22° /10° 0 mm 6
May 12 Partly cloudy
Partly cloudy
26° /11° 0 mm 7
May 13 Light rain shower
Light rain shower
18° /15° 18.3 mm 4
May 14 Light rain shower
Light rain shower
20° /11° 0.4 mm 5
May 15 Patchy rain possible
Patchy rain possible
21° /13° 0.2 mm 5
May 16 Light rain shower
Light rain shower
23° /14° 10.9 mm 5
May 17 Moderate rain
Moderate rain
18° /15° 27.9 mm 4
May 18 Fog
Fog
27° /14° 0.1 mm 6
May 19 Sunny
Sunny
29° /17° 0 mm 7
May 20 Thundery outbreaks possible
Thundery outbreaks possible
29° /18° 0.3 mm 6
May 21 Sunny
Sunny
32° /18° 0.8 mm 8
May 22 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
23° /18° 9.4 mm 5
May 23 Thundery outbreaks possible
Thundery outbreaks possible
24° /15° 0.6 mm 5
May 24 Patchy light rain with thunder
Patchy light rain with thunder
30° /17° 1.9 mm 7
May 25 Partly cloudy
Partly cloudy
26° /14° 0 mm 7
May 26 Patchy light drizzle
Patchy light drizzle
32° /19° 1.2 mm 7
May 27 Patchy rain possible
Patchy rain possible
25° /17° 0.3 mm 6
May 28 Sunny
Sunny
23° /13° 0 mm 6
May 29 Partly cloudy
Partly cloudy
22° /12° 0 mm 6
May 30 Sunny
Sunny
23° /11° 0 mm 6
May 31 Light rain
Light rain
19° /14° 22.3 mm 4
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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.

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 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 Saint Louis County during May?
Significant rainfall exceeding 148.3 mm is expected in Saint Louis County during May, occurring over more than 20 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 💧

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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Location coordinates 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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