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The temperatures in St. Louis in April are quite cold with temperatures between 5°C and 14°C, warm clothes are a must.
You can expect rain for roughly half of the month of April in St. Louis. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in St. Louis during April. It’s important to get out your snow boots and warm mittens to stay warm while you explore St. Louis.
Our weather forecast can give you a great sense of what weather to expect in St. Louis in April 2026.
If you’re planning to visit St. Louis in the near future, we highly recommend that you review the 14 day weather forecast for St. Louis before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -7° | 6 | 8 | 17 | 104 mm | Awful | St. Louis in January |
| February | 1° / -6° | 6 | 7 | 15 | 104 mm | Awful | St. Louis in February |
| March | 8° / 0° | 9 | 13 | 9 | 131 mm | Awful | St. Louis in March |
| April | 14° / 5° | 10 | 17 | 3 | 161 mm | Bad | St. Louis in April |
| May | 21° / 12° | 10 | 21 | 0 | 179 mm | Ok | St. Louis in May |
| June | 25° / 16° | 9 | 21 | 0 | 184 mm | Good | St. Louis in June |
| July | 27° / 17° | 9 | 22 | 0 | 165 mm | Good | St. Louis in July |
| August | 26° / 16° | 7 | 24 | 0 | 138 mm | Good | St. Louis in August |
| September | 23° / 13° | 6 | 24 | 0 | 109 mm | Perfect | St. Louis in September |
| October | 17° / 8° | 6 | 24 | 1 | 120 mm | Good | St. Louis in October |
| November | 9° / 2° | 7 | 18 | 5 | 107 mm | Awful | St. Louis in November |
| December | 3° / -2° | 8 | 11 | 12 | 102 mm | Awful | St. Louis in December |