No
you don't need a jacket based on the weather in Chelmsford, MA, USA 1 second ago
74°F24°C & Cloudy
Wind is 3 mph5 km/h from the Southeast, gusting to 6 mph9 km/h
| August 19 | ||||
| 5pm | 74°F23°C | 4 mph7 km/h Southeast | Partly Cloudy | |
| 6pm | 71°F22°C | 7 mph12 km/h Southeast | Mostly Cloudy | |
| 7pm | 68°F20°C | 8 mph12 km/h Southeast | Partly Cloudy | |
| 8pm | 65°F18°C | 7 mph11 km/h Southeast | Mostly Cloudy | |
| 9pm | 63°F17°C | 6 mph9 km/h Southeast | Mostly Cloudy | |
| 10pm | 62°F17°C | 5 mph8 km/h Southeast | Mostly Cloudy | |
| 11pm | 60°F16°C | 4 mph6 km/h Southeast | Mostly Cloudy | |
| August 20 | ||||
| 12am | 59°F15°C | 3 mph4 km/h Southeast | Cloudy | |
| 1am | 59°F15°C | 2 mph4 km/h South | Mostly Cloudy | |
| 2am | 58°F15°C | 2 mph4 km/h South | Cloudy | |
| 3am | 58°F14°C | 2 mph3 km/h Southeast | Cloudy | |
| 4am | 58°F14°C | 1 mph2 km/h Southeast | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| August 19 | 51°F11°C | 75°F24°C | 2 mph4 km/h from Southeast | Mostly Cloudy | Mostly Cloudy |
| August 20 | 57°F14°C | 65°F18°C | 4 mph7 km/h from Northeast | Rain | Rain |
| August 21 | 57°F14°C | 70°F21°C | 9 mph14 km/h from Northeast | Drizzle | Mostly Cloudy |
| August 22 | 56°F13°C | 75°F24°C | 9 mph15 km/h from Northeast | Partly Cloudy | Mostly Clear |
| August 23 | 58°F15°C | 80°F27°C | 6 mph10 km/h from South | Mostly Clear | Partly Cloudy |
| August 24 | 62°F17°C | 78°F26°C | 8 mph13 km/h from South | Mostly Cloudy | Drizzle |
| August 25 | 63°F17°C | 76°F24°C | 7 mph11 km/h from South | Drizzle | Thunderstorms |
Yes
Low of 57°F14°C, High of 64°F18°CWind: 4 mph7 km/h
Precipitation: 72% rain