Weather in St Louis in May 2025
Average weather
Average temperature in St Louis in May
Going from a maximum of +91°F during the day to a minimum of +45°F during the night, the temperature in May averages around +81°F.
The average maximum temperature goes up 54% by the end of the month, compared with the beginning of the month, from +63°F to +88°F.
Is St Louis warm or cold in May?
St Louis is typically warm in May.
Maximum temperatures go up compared to the previous month from +68°F to +77°F. The minimum temperature also goes up from +48°F to +59°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how May is compared to other months in St Louis:
Climate in St Louis in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +68°F | +77°F | +86°F | ||||
| Min. temperature | ||||||
| +23°F | +37°F | +48°F | ||||
| Max. temperature | ||||||
| +91°F | +93°F | +106°F | ||||
| Rainfall | ||||||
| 113 mm | 130 mm | 108 mm | ||||
| Wind | ||||||
| 3 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 64% | 68% | 69% | ||||
| Air pressure | ||||||
| 1014 HPa | 1013 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 8 | 7 | 8 | ||||
| Cloudy days | ||||||
| 6 | 6 | 5 | ||||
| Rainy days | ||||||
| 15 | 17 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
May weather is still as good as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +68°F to +77°F during the day. Prepare for more rain. Average rainfall goes from 113 mm to 130 mm. Humidity rises from 64% to 68%. Winds are calmer in comparison to April, going down from 3 m/s to 2 m/s on average. The days becoming less sunny, going from 8 sunny days in April to 7 in May.
June brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in St Louis is gradually decreasing during May, going from 7 m/s to 1 m/s over the course of the month.
Rain
How was the weather last May in St Louis?
Climate Change Over the Years
The climate in St Louis in May has not changed that much over the last 43 years.
The average temperature was the lowest in 1979 (+64°F) and the highest in 2012 (+71°F). The driest year was 2007 with only 666 mm of rainfall, and the wettest year was 2020 with 1575 mm.
FAQ
Is May a good time to visit St Louis?
Can you sunbathe in St Louis in May?
Is St Louis rainy in May?
Is it sunny in St Louis in May?
Other cities in USA
Monthly weather in St Louis
Source of the data
For this page, we’ve looked at the typical weather in St Louis, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.