No
you don't need a jacket based on the weather in Boulder, CO 80301, USA 1 second ago
70°F21°C & Cloudy
Wind is 3 mph5 km/h from the East, gusting to 11 mph18 km/h
| September 14 | ||||
| 5pm | 71°F22°C | 5 mph7 km/h East | Partly Cloudy | |
| 6pm | 73°F23°C | 7 mph11 km/h East | Mostly Clear | |
| 7pm | 73°F23°C | 5 mph8 km/h East | Clear | |
| 8pm | 73°F23°C | 3 mph6 km/h Southeast | Clear | |
| 9pm | 69°F20°C | 4 mph7 km/h Southeast | Clear | |
| 10pm | 65°F18°C | 5 mph8 km/h Southeast | Clear | |
| 11pm | 61°F16°C | 4 mph6 km/h Southwest | Clear | |
| September 15 | ||||
| 12am | 59°F15°C | 5 mph9 km/h West | Clear | |
| 1am | 58°F14°C | 6 mph10 km/h West | Partly Cloudy | |
| 2am | 57°F14°C | 7 mph11 km/h West | Partly Cloudy | |
| 3am | 57°F14°C | 6 mph10 km/h West | Partly Cloudy | |
| 4am | 56°F13°C | 6 mph10 km/h Southwest | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 14 | 50°F10°C | 73°F23°C | 3 mph5 km/h from East | Drizzle | Mostly Clear |
| September 15 | 54°F12°C | 80°F26°C | 6 mph9 km/h from South | Mostly Clear | Mostly Clear |
| September 16 | 54°F12°C | 71°F22°C | 4 mph7 km/h from North | Mostly Cloudy | Drizzle |
| September 17 | 49°F10°C | 63°F17°C | 5 mph7 km/h from North | Drizzle | Drizzle |
| September 18 | 48°F9°C | 69°F20°C | 4 mph6 km/h from East | Partly Cloudy | Mostly Clear |
| September 19 | 49°F9°C | 72°F22°C | 4 mph6 km/h from East | Mostly Clear | Partly Cloudy |
| September 20 | 51°F10°C | 74°F24°C | 4 mph6 km/h from East | Partly Cloudy | Mostly Clear |
Yes
Low of 54°F12°C, High of 80°F27°CWind: 6 mph9 km/h
Precipitation: None