No
you don't need a jacket based on the weather in St Peters, MO, USA 1 second ago
67°F19°C & Mostly Clear
Wind is 4 mph6 km/h from the North, gusting to 6 mph9 km/h
| September 16 | ||||
| 6am | 66°F19°C | 4 mph6 km/h North | Mostly Clear | |
| 7am | 66°F19°C | 4 mph6 km/h North | Clear | |
| 8am | 65°F19°C | 3 mph5 km/h North | Clear | |
| 9am | 69°F20°C | 3 mph4 km/h Northeast | Clear | |
| 10am | 74°F24°C | 3 mph5 km/h Northeast | Clear | |
| 11am | 80°F26°C | 3 mph5 km/h Northeast | Clear | |
| 12pm | 84°F29°C | 3 mph5 km/h East | Clear | |
| 1pm | 87°F31°C | 4 mph7 km/h Northeast | Clear | |
| 2pm | 89°F32°C | 5 mph8 km/h Northeast | Clear | |
| 3pm | 90°F32°C | 6 mph9 km/h Northeast | Mostly Clear | |
| 4pm | 90°F32°C | 6 mph10 km/h Northeast | Mostly Clear | |
| 5pm | 90°F32°C | 7 mph11 km/h Northeast | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 16 | 65°F18°C | 90°F32°C | 5 mph7 km/h from Northeast | Clear | Mostly Clear |
| September 17 | 64°F18°C | 88°F31°C | 4 mph7 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 18 | 63°F17°C | 90°F32°C | 3 mph5 km/h from Southeast | Mostly Clear | Partly Cloudy |
| September 19 | 67°F19°C | 84°F29°C | 4 mph6 km/h from South | Mostly Cloudy | Partly Cloudy |
| September 20 | 65°F18°C | 86°F30°C | 4 mph7 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| September 21 | 66°F19°C | 84°F29°C | 7 mph12 km/h from South | Partly Cloudy | Mostly Cloudy |
| September 22 | 67°F20°C | 80°F27°C | 8 mph13 km/h from South | Thunderstorms | Thunderstorms |
No
Low of 64°F18°C, High of 88°F31°CWind: 4 mph7 km/h
Precipitation: None