Weather in City of Saint Louis, Missouri for May 2026
Flood Warning - See hour by hour.
Until now, May 2026 in City of Saint Louis has been significantly cooler than historical averages by -2 °F, with average temperature of 19.5 °F.
The forecast for the upcoming days in City of Saint Louis predicts a temperature of 25.8 °F, which is slightly above the historical average.
In general, the average temperature in City of Saint Louis at the beginning of May is 20.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25.1 °F by the end of May.
City of Saint Louis experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 221.7 mm.
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City of Saint Louis Weather May
Temperatures trend during May in City of Saint Louis
May weather in City of Saint Louis day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Sunny | 21° /11° | 6.5 mm | 6 | |
| May 2 |  Moderate rain at times | 19° /11° | 4.5 mm | 5 | |
| May 3 | Sunny | 21° /11° | 17.7 mm | 6 | |
| May 4 | Moderate or heavy rain shower | 20° /10° | 9.4 mm | 5 | |
| May 5 | Moderate or heavy rain shower | 19° /10° | 16.4 mm | 4 | |
| May 6 | Moderate rain at times | 19° /10° | 2.5 mm | 5 | |
| May 7 |  Overcast | 24° /12° | 3.4 mm | 7 | |
| May 8 |  Patchy rain possible | 22° /11° | 5.1 mm | 6 | |
| May 9 | Sunny | 24° /12° | 3.4 mm | 6 | |
| May 10 | Overcast | 23° /11° | 0.3 mm | 6 | |
| May 11 | Patchy rain possible | 24° /12° | 0.8 mm | 6 | |
| May 12 |  Partly cloudy | 24° /14° | 5 mm | 7 | |
| May 13 | Sunny | 26° /14° | 0 mm | 7.9 | |
| May 14 | Sunny | 21° /9° | 0 mm | 8.4 | |
| May 15 | Patchy rain possible | 32° /13° | 2.4 mm | 0.3 | |
| May 16 |  Moderate rain | 24° /20° | 9.1 mm | 5 | |
| May 17 | Sunny | 31° /18° | 0 mm | 6 | |
| May 18 | Moderate rain | 28° /21° | 7.6 mm | 5 | |
| May 19 | Moderate rain | 27° /20° | 6.8 mm | 5 | |
| May 20 | Patchy rain possible | 26° /15° | 1 mm | 5 | |
| May 21 | Sunny | 27° /16° | 0 mm | 6 | |
| May 22 | Patchy rain possible | 26° /16° | 4.1 mm | 5 | |
| May 23 | Sunny | 20° /12° | 0 mm | 5 | |
| May 24 | Sunny | 21° /9° | 0 mm | 4 | |
| May 25 | Sunny | 25° /12° | 0 mm | 5 | |
| May 26 | Patchy rain possible | 27° /14° | 0.2 mm | 5 | |
| May 27 | Moderate or heavy rain shower | 24° /14° | 12.5 mm | 5 | |
| May 28 | Overcast | 24° /13° | 2 mm | 6 | |
| May 29 | Partly cloudy | 23° /13° | 2.3 mm | 6 | |
| May 30 | Sunny | 26° /14° | 0 mm | 7 | |
| May 31 | Partly cloudy | 27° /16° | 1.6 mm | 6 | |
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City of Saint Louis in May - FAQ
What are the expected maximum and minimum temperatures in City of Saint Louis during May?
How much rainfall should be expected in City of Saint Louis during May?
What are the typical wind conditions in City of Saint Louis during May?
May rainfall patterns in City of Saint Louis
UV exposure in City of Saint Louis during May
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