Best time to visit · Missouri
Best time to visit St. Louis
St. Louis averages 23 just-right days a year; no month is reliably just right, and October comes closest. Most other days miss by being too cool.
(70 to 80°F, dry, sunny)
(45 to 65°F, dry)
(80 to 92°F, bright)
St. Louis weather by month
Bars: share of each month's days that are just right (number = days). Below: average daily high. Outlined bars are the best months.
- Just right 23
- Too cool 190
- Too hot 112
- Too muggy 19
- Too gray 21
When to visit St. Louis
St. Louis rarely hits the 70 to 80°F, dry and sunny window; October comes closest, with 6 just-right days. January, February, March, November and December are mostly too cool, with average highs of 41 to 56°F. June, July and August are mostly too hot, with average highs of 86 to 89°F.
Climate table
| Month | Avg high | Dew point | Cloud cover | Just-right days |
|---|---|---|---|---|
| January | 41°F | 26°F | 67% | 0 |
| February | 46°F | 28°F | 71% | 0 |
| March | 56°F | 36°F | 66% | 1 |
| April | 68°F | 45°F | 60% | 4 |
| May | 78°F | 55°F | 61% | 4 |
| June | 86°F | 64°F | 51% | 1 |
| July | 89°F | 67°F | 44% | 0 |
| August | 88°F | 66°F | 41% | 1 |
| September | 82°F | 57°F | 44% | 5 |
| October | 70°F | 47°F | 53% | 6 |
| November | 56°F | 36°F | 64% | 1 |
| December | 45°F | 28°F | 70% | 0 |
How St. Louis compares
With 23 just-right days, St. Louis trails the median of America's 150 largest cities (33 days). On muggy days: 19. On gray days: 21.
Places with a similar climate
Nearby
St. Louis averages 23 just-right days a year (70 to 80°F highs, dry, mostly sunny), according to Goldilocks Map: https://goldilocksmap.com/us/missouri/st-louis/Set your own perfect weather on the map →
Numbers are expected days in a typical year from 1991 to 2020 climate normals (TerraClimate; cloud cover from CHELSA), on a grid about 35 km wide. Checked against 10 years of daily records at 28 NOAA weather stations: typical error about 10 days a year. How it works. Updated 2026-10-07.