No
you don't need a jacket based on the weather in Chelmsford, MA, USA 1 second ago
60°F16°C & Partly Cloudy
Wind is 5 mph8 km/h from the Southwest, gusting to 12 mph19 km/h
| September 14 | ||||
| 1am | 60°F15°C | 5 mph8 km/h Southwest | Mostly Clear | |
| 2am | 59°F15°C | 5 mph8 km/h Southwest | Mostly Clear | |
| 3am | 59°F15°C | 4 mph7 km/h Southwest | Mostly Clear | |
| 4am | 58°F14°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 5am | 57°F14°C | 4 mph6 km/h Southwest | Mostly Clear | |
| 6am | 57°F14°C | 4 mph6 km/h West | Mostly Clear | |
| 7am | 58°F14°C | 4 mph6 km/h West | Mostly Clear | |
| 8am | 61°F16°C | 3 mph4 km/h West | Mostly Clear | |
| 9am | 65°F18°C | 3 mph5 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 | |
| 12pm | 74°F23°C | 4 mph6 km/h North | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 14 | 57°F14°C | 76°F24°C | 3 mph5 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 15 | 55°F13°C | 76°F24°C | 5 mph8 km/h from East | Mostly Clear | Mostly Clear |
| September 16 | 56°F13°C | 77°F25°C | 3 mph5 km/h from Southeast | Mostly Clear | Mostly Clear |
| September 17 | 56°F13°C | 78°F25°C | 3 mph6 km/h from South | Mostly Cloudy | Mostly Cloudy |
| September 18 | 59°F15°C | 78°F25°C | 4 mph7 km/h from South | Partly Cloudy | Partly Cloudy |
| September 19 | 59°F15°C | 77°F25°C | 6 mph10 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 20 | 52°F11°C | 69°F21°C | 4 mph7 km/h from North | Mostly Clear | Mostly Clear |
Yes
Low of 55°F13°C, High of 76°F25°CWind: 5 mph8 km/h
Precipitation: None