Weather by month
St. Louis
Missouri
A river-valley city with genuinely heavy summers and winters that mostly threaten rather than deliver.
The best time to come
October is the easy answer — warm afternoons, cool nights, and Forest Park at its absolute best — with April a close second if you can live with a storm or two. September works beautifully as well, once the worst of the humidity has packed up and gone.
The year at a glance
| Month | Highs / lows | Temperature range | Wet days | Snow |
|---|---|---|---|---|
| January | 40° / 24° | 5 | 5.7 in | |
| February | 46° / 28° | 4 | 4.3 in | |
| March | 57° / 37° | 2 | 2.3 in | |
| April ● | 68° / 47° | 8 | — | |
| May | 77° / 58° | 8 | — | |
| June | 86° / 67° | 7 | — | |
| July | 90° / 71° | 6 | — | |
| August | 88° / 69° | 5 | — | |
| September ● | 81° / 61° | 5 | — | |
| October ● | 69° / 49° | 6 | — | |
| November | 56° / 37° | 5 | 0.9 in | |
| December | 45° / 29° | 3 | 3.2 in |
St. Louis facts
- Sits at about 530 ft above sea level.
- 41.7 in of rain and melted snow in a typical year, with May the wettest month.
- 16.6 in of snow in a typical winter.
- July runs hottest (90° afternoons); January nights are the coldest (24°).