No
you don't need a jacket based on the weather in Rockville, MD, USA 21 seconds ago
65°F18°C & Cloudy
Wind is 4 mph6 km/h from the North, gusting to 11 mph17 km/h
| September 18 | ||||
| 12am | 65°F18°C | 4 mph6 km/h North | Cloudy | |
| 1am | 64°F18°C | 4 mph6 km/h North | Mostly Cloudy | |
| 2am | 64°F18°C | 4 mph6 km/h North | Mostly Cloudy | |
| 3am | 63°F17°C | 5 mph8 km/h North | Mostly Cloudy | |
| 4am | 63°F17°C | 4 mph7 km/h Northwest | Mostly Cloudy | |
| 5am | 62°F17°C | 4 mph6 km/h Northwest | Mostly Cloudy | |
| 6am | 62°F17°C | 4 mph6 km/h Northwest | Partly Cloudy | |
| 7am | 61°F16°C | 3 mph5 km/h Northwest | Mostly Clear | |
| 8am | 63°F17°C | 3 mph5 km/h Northwest | Mostly Clear | |
| 9am | 66°F19°C | 3 mph6 km/h Northwest | Mostly Clear | |
| 10am | 69°F21°C | 4 mph6 km/h Northwest | Mostly Clear | |
| 11am | 72°F22°C | 4 mph6 km/h Northwest | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 59°F15°C | 67°F19°C | 3 mph5 km/h from North | Rain | Drizzle |
| September 18 | 61°F16°C | 80°F27°C | 4 mph6 km/h from Northwest | Clear | Clear |
| September 19 | 60°F16°C | 84°F29°C | 4 mph7 km/h from Northwest | Clear | Mostly Clear |
| September 20 | 61°F16°C | 76°F24°C | 7 mph11 km/h from East | Mostly Clear | Mostly Cloudy |
| September 21 | 62°F17°C | 74°F23°C | 6 mph10 km/h from East | Mostly Cloudy | Partly Cloudy |
| September 22 | 62°F17°C | 78°F25°C | 6 mph9 km/h from South | Partly Cloudy | Mostly Clear |
| September 23 | 63°F17°C | 80°F27°C | 6 mph9 km/h from South | Partly Cloudy | Partly Cloudy |
No
Low of 62°F17°C, High of 81°F27°CWind: 4 mph6 km/h
Precipitation: None