No
you don't need a jacket based on the weather in St Peters, MO, USA 1 second ago
73°F23°C & Mostly Clear
Wind is 4 mph6 km/h from the West, gusting to 10 mph16 km/h
| September 14 | ||||
| 5am | 72°F22°C | 4 mph6 km/h West | Partly Cloudy | |
| 6am | 72°F22°C | 4 mph6 km/h West | Mostly Cloudy | |
| 7am | 71°F22°C | 3 mph5 km/h West | Partly Cloudy | |
| 8am | 70°F21°C | 2 mph3 km/h West | Partly Cloudy | |
| 9am | 73°F23°C | 2 mph3 km/h West | Partly Cloudy | |
| 10am | 79°F26°C | 3 mph4 km/h Northwest | Partly Cloudy | |
| 11am | 83°F28°C | 4 mph6 km/h Northwest | Mostly Cloudy | |
| 12pm | 87°F31°C | 4 mph7 km/h Northwest | Mostly Cloudy | |
| 1pm | 90°F32°C | 4 mph7 km/h North | Mostly Cloudy | |
| 2pm | 92°F33°C | 4 mph6 km/h North | Mostly Cloudy | |
| 3pm | 93°F34°C | 3 mph5 km/h North | Mostly Cloudy | |
| 4pm | 94°F34°C | 3 mph5 km/h North | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 14 | 70°F21°C | 94°F34°C | 3 mph5 km/h from North | Mostly Cloudy | Mostly Cloudy |
| September 15 | 71°F22°C | 89°F32°C | 5 mph9 km/h from East | Mostly Cloudy | Mostly Clear |
| September 16 | 66°F19°C | 89°F32°C | 4 mph6 km/h from East | Mostly Clear | Partly Cloudy |
| September 17 | 66°F19°C | 88°F31°C | 4 mph6 km/h from East | Partly Cloudy | Partly Cloudy |
| September 18 | 67°F19°C | 85°F29°C | 6 mph9 km/h from Southwest | Mostly Cloudy | Rain |
| September 19 | 67°F19°C | 80°F27°C | 5 mph9 km/h from Southwest | Drizzle | Thunderstorms |
| September 20 | 63°F17°C | 78°F25°C | 6 mph9 km/h from West | Drizzle | Partly Cloudy |
No
Low of 72°F22°C, High of 90°F32°CWind: 5 mph9 km/h
Precipitation: None