St. Louis weather in May
May in St. Louis averages 77°F by day and 58°F at night, with 4.8 inches of precipitation. It is the 5th-warmest and 1st-wettest month of the year here.
- Average high
- 77°F+9° vs April
- Average low
- 58°F0 nights below freezing
- Precipitation
- 4.8 in8 days with 0.1 in. or more
- Snow
- 0.0 in2 days at 90°F+
Is May a good time to visit St. Louis?
May is pleasant by day, but it is one of the wetter months. The most comfortable months overall are June and September to October.
What to do in St. Louis in May
Mix it up: Gateway Arch, Missouri Botanical Garden, Gateway Arch National Park, Saint Louis Art Museum. All things to do in St. Louis.
On May 15 the sun rises at 5:49 am and sets at 8:06 pm, giving 14h 17m of daylight. Daylight all year.
What to pack for St. Louis in May
- Summer clothes, with a light layer for air conditioning
- An umbrella or rain jacket
Based on 30-year averages, not a forecast. Check the forecast a few days before you go.
May nearby
| City | Distance | High | Low | Precip. |
|---|---|---|---|---|
| St. Louis | 77°F | 58°F | 4.8 in | |
| O'Fallon, MO | 28 mi | 77°F | 58°F | 4.8 in |
| Springfield, IL | 84 mi | 76°F | 54°F | 4.5 in |
| Columbia, MO | 114 mi | 76°F | 56°F | 4.8 in |
| Bloomington, IL | 145 mi | 74°F | 50°F | 4.8 in |
| Champaign, IL | 148 mi | 74°F | 53°F | 4.8 in |
| Peoria, IL | 148 mi | 74°F | 53°F | 4.7 in |
Frequently asked questions
What is the weather like in St. Louis in May?
In May, St. Louis averages a high of 77°F and a low of 58°F, with 4.8 inches of precipitation (NOAA 1991-2020 normals).
Is May a good time to visit St. Louis?
May is mild by day but wetter than ideal, with 4.8 inches of rain.
Does it snow in St. Louis in May?
Rarely. The May snowfall normal is under half an inch.
Before and after: St. Louis in April and St. Louis in June. All twelve months: St. Louis weather by month.
NOAA NCEI 1991-2020 climate normals, station St Louis Lambert Intl. Airport, MO, 9.8 miles from the city center.