No
you don't need a jacket based on the weather in Chantilly, VA, USA 1 second ago
68°F20°C & Clear
Wind is 4 mph7 km/h from the Southwest, gusting to 11 mph18 km/h
| September 19 | ||||
| 12am | 68°F20°C | 5 mph8 km/h Southwest | Clear | |
| 1am | 67°F19°C | 4 mph7 km/h Southwest | Clear | |
| 2am | 66°F19°C | 4 mph6 km/h Southwest | Clear | |
| 3am | 65°F18°C | 4 mph7 km/h Southwest | Clear | |
| 4am | 64°F18°C | 4 mph6 km/h Southwest | Clear | |
| 5am | 63°F17°C | 3 mph5 km/h Southwest | Clear | |
| 6am | 62°F17°C | 3 mph5 km/h Northwest | Clear | |
| 7am | 61°F16°C | 4 mph6 km/h Northwest | Clear | |
| 8am | 63°F17°C | 4 mph6 km/h Northwest | Clear | |
| 9am | 68°F20°C | 4 mph7 km/h Northwest | Clear | |
| 10am | 74°F23°C | 5 mph8 km/h Northwest | Clear | |
| 11am | 77°F25°C | 6 mph9 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 63°F17°C | 84°F29°C | 1 mph2 km/h from Northwest | Mostly Clear | Clear |
| September 19 | 61°F16°C | 85°F29°C | 4 mph6 km/h from Northwest | Clear | Mostly Clear |
| September 20 | 62°F17°C | 77°F25°C | 6 mph9 km/h from Northeast | Partly Cloudy | Mostly Cloudy |
| September 21 | 63°F17°C | 74°F24°C | 5 mph9 km/h from East | Mostly Cloudy | Partly Cloudy |
| September 22 | 59°F15°C | 79°F26°C | 6 mph9 km/h from South | Partly Cloudy | Partly Cloudy |
| September 23 | 64°F18°C | 83°F28°C | 4 mph7 km/h from Southwest | Drizzle | Partly Cloudy |
| September 24 | 64°F18°C | 80°F27°C | 4 mph6 km/h from North | Drizzle | Rain |
No
Low of 61°F16°C, High of 85°F30°CWind: 4 mph6 km/h
Precipitation: None