St. Louis, MO Hourly Forecast
St. Louis temperature trend - Next 24 hours
The next 24 hours at a glance
- Warmest hour: 4 PM - around 96°
- Coolest hour: 8 AM - around 75°
- Highest rain chance: 1 AM (72%) - pack accordingly
- UV peak: 1 PM at index 7 - sun protection recommended
- Windiest: 7 PM at 6 mph
St. Louis hourly weather - Tuesday, September 15
In St. Louis, expect a high near 91°F (33°C) around 7 PM and a low of 80°F (27°C) near 11 PM; precipitation risk peaks at 46% around 11 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 7 PM | Patchy light rain | 91° | 94° | 36% | 6 mph S | 45% | 0 | |
| 8 PM | Patchy rain nearby | 86° | 91° | 10% | 6 mph WSW | 58% | 0 | |
| 9 PM | Light rain shower | 87° | 91° | 17% | 1 mph SW | 58% | 0 | |
| 10 PM | Patchy rain nearby | 83° | 88° | 27% | 6 mph ENE | 64% | 0 | |
| 11 PM | Light rain shower | 80° | 83° | 46% | 4 mph E | 70% | 0 |
St. Louis hourly weather - Wednesday, September 16
In St. Louis, expect a high near 96°F (35°C) around 4 PM and a low of 75°F (24°C) near 8 AM; precipitation risk peaks at 72% around 1 AM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Light rain shower | 80° | 83° | 34% | 6 mph SE | 68% | 0 | |
| 1 AM | Patchy rain nearby | 79° | 84° | 72% | 5 mph SSE | 84% | 0 | |
| 2 AM | Patchy rain nearby | 77° | 86° | 68% | 1 mph WNW | 88% | 0 | |
| 3 AM | Light rain shower | 78° | 84° | 61% | 3 mph E | 87% | 0 | |
| 4 AM | Overcast | 76° | 84° | 28% | 1 mph ESE | 88% | 0 | |
| 5 AM | Light rain shower | 76° | 84° | 61% | 2 mph SE | 88% | 0 | |
| 6 AM | Light rain shower | 76° | 84° | 60% | 3 mph E | 88% | 0 | |
| 7 AM | Light rain shower | 76° | 84° | 65% | 1 mph SE | 88% | 0 | |
| 8 AM | Light rain shower | 75° | 83° | 72% | 1 mph S | 86% | 0 | |
| 9 AM | Overcast | 78° | 84° | 21% | 1 mph SSE | 78% | 1 | |
| 10 AM | Patchy rain nearby | 81° | 85° | 39% | 5 mph NW | 70% | 3 | |
| 11 AM | Sunny | 86° | 91° | 3% | 2 mph NNW | 60% | 5 | |
| 12 PM | Patchy rain nearby | 89° | 94° | 23% | 4 mph NW | 53% | 6 | |
| 1 PM | Patchy rain nearby | 92° | 96° | 17% | 3 mph NW | 47% | 7 | |
| 2 PM | Sunny | 94° | 99° | 1% | 2 mph WSW | 43% | 6 | |
| 3 PM | Sunny | 95° | 99° | 1% | 4 mph SSW | 40% | 5 | |
| 4 PM | Sunny | 96° | 99° | 1% | 4 mph SSW | 38% | 3 | |
| 5 PM | Sunny | 95° | 99° | 1% | 4 mph SSW | 38% | 1 | |
| 6 PM | Sunny | 94° | 98° | 1% | 3 mph SE | 40% | 0 | |
| 7 PM | Sunny | 92° | 96° | 1% | 4 mph ESE | 45% | 0 | |
| 8 PM | Overcast | 88° | 91° | 12% | 8 mph SW | 52% | 0 | |
| 9 PM | Overcast | 84° | 89° | 15% | 3 mph W | 63% | 0 | |
| 10 PM | Patchy rain nearby | 85° | 91° | 19% | 3 mph ESE | 62% | 0 | |
| 11 PM | Cloudy | 85° | 89° | 9% | 5 mph SSE | 61% | 0 |
St. Louis hourly weather - Thursday, September 17
In St. Louis, expect a high near 99°F (37°C) around 4 PM and a low of 79°F (26°C) near 7 AM; precipitation risk peaks at 40% around 8 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Overcast | 85° | 89° | 15% | 4 mph SSE | 62% | 0 | |
| 1 AM | Partly Cloudy | 83° | 87° | 7% | 4 mph S | 63% | 0 | |
| 2 AM | Cloudy | 82° | 86° | 9% | 3 mph WSW | 64% | 0 | |
| 3 AM | Partly Cloudy | 82° | 86° | 5% | 2 mph WSW | 63% | 0 | |
| 4 AM | Clear | 82° | 86° | 4% | 3 mph SSW | 64% | 0 | |
| 5 AM | Clear | 82° | 86° | 4% | 4 mph SSW | 65% | 0 | |
| 6 AM | Clear | 81° | 84° | 5% | 5 mph WNW | 66% | 0 | |
| 7 AM | Sunny | 79° | 83° | 6% | 3 mph WNW | 70% | 0 | |
| 8 AM | Sunny | 79° | 82° | 4% | 4 mph W | 64% | 0 | |
| 9 AM | Sunny | 83° | 85° | 3% | 4 mph WNW | 56% | 1 | |
| 10 AM | Sunny | 88° | 90° | 2% | 5 mph W | 49% | 3 | |
| 11 AM | Sunny | 91° | 94° | 1% | 7 mph WNW | 42% | 5 | |
| 12 PM | Sunny | 94° | 95° | 1% | 6 mph WNW | 39% | 6 | |
| 1 PM | Sunny | 96° | 98° | 1% | 5 mph WNW | 36% | 7 | |
| 2 PM | Sunny | 98° | 100° | 1% | 4 mph W | 33% | 6 | |
| 3 PM | Sunny | 99° | 101° | 1% | 4 mph W | 31% | 5 | |
| 4 PM | Cloudy | 99° | 102° | 6% | 2 mph W | 30% | 3 | |
| 5 PM | Overcast | 97° | 101° | 8% | 2 mph W | 33% | 1 | |
| 6 PM | Patchy rain nearby | 94° | 100° | 11% | 2 mph WSW | 44% | 0 | |
| 7 PM | Patchy rain nearby | 93° | 98° | 17% | 5 mph ESE | 45% | 0 | |
| 8 PM | Patchy rain nearby | 85° | 92° | 40% | 6 mph ESE | 67% | 0 | |
| 9 PM | Patchy rain nearby | 84° | 90° | 14% | 7 mph W | 68% | 0 | |
| 10 PM | Patchy rain nearby | 83° | 87° | 36% | 7 mph WNW | 68% | 0 | |
| 11 PM | Overcast | 81° | 85° | 19% | 6 mph NW | 73% | 0 |
Quick answers for the hours ahead
What is the warmest hour in St. Louis today?
Will it rain in St. Louis tonight?
When is the UV index highest in St. Louis today?
St. Louis hour-by-hour: what to expect
Over the next 24 hours in St. Louis, temperatures range from 75°F (24°C) around 8 AM up to 96°F (35°C) near 4 PM - about 14°F (8°C) above the typical September high of 82°F (28°C).
Precipitation is a real possibility: the chance of rain peaks at 72% around 1 AM. UV reaches 7 (1 PM) - sun protection recommended through midday.
The “feels like” column blends humidity and wind into an apparent temperature - see how it works in our feels-like temperature guide. Planning further ahead? Check the St. Louis 14-day forecast or the monthly climate averages.