No
you don't need a jacket based on the weather in Boulder (Downtown), Colorado, United States 30 seconds ago
72°F22°C & Partly Cloudy
Wind is 7 mph12 km/h from the Northeast, gusting to 11 mph17 km/h
| September 16 | ||||
| 2pm | 73°F23°C | 7 mph11 km/h Northeast | Mostly Cloudy | |
| 3pm | 74°F23°C | 7 mph11 km/h Northeast | Mostly Cloudy | |
| 4pm | 74°F24°C | 7 mph12 km/h East | Mostly Cloudy | |
| 5pm | 73°F23°C | 6 mph9 km/h Northeast | Cloudy | |
| 6pm | 71°F22°C | 13 mph21 km/h Southwest | Thunderstorms | |
| 7pm | 71°F22°C | 5 mph8 km/h Northeast | Partly Cloudy | |
| 8pm | 70°F21°C | 5 mph9 km/h Southeast | Cloudy | |
| 9pm | 63°F17°C | 9 mph15 km/h Southwest | Drizzle | |
| 10pm | 61°F16°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| 11pm | 59°F15°C | 5 mph8 km/h Southwest | Mostly Cloudy | |
| September 17 | ||||
| 12am | 58°F15°C | 4 mph6 km/h West | Mostly Cloudy | |
| 1am | 56°F14°C | 2 mph3 km/h Northwest | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 16 | 54°F12°C | 74°F24°C | 6 mph9 km/h from East | Partly Cloudy | Drizzle |
| September 17 | 49°F9°C | 68°F20°C | 5 mph8 km/h from East | Partly Cloudy | Partly Cloudy |
| September 18 | 47°F8°C | 68°F20°C | 5 mph7 km/h from East | Partly Cloudy | Mostly Clear |
| September 19 | 48°F9°C | 75°F24°C | 5 mph8 km/h from East | Mostly Clear | Partly Cloudy |
| September 20 | 54°F12°C | 79°F26°C | 4 mph7 km/h from West | Partly Cloudy | Mostly Clear |
| September 21 | 59°F15°C | 78°F26°C | 6 mph10 km/h from West | Partly Cloudy | Mostly Clear |
| September 22 | 59°F15°C | 78°F26°C | 6 mph10 km/h from Northwest | Mostly Clear | Clear |
Yes
Low of 49°F10°C, High of 68°F20°CWind: 5 mph8 km/h
Precipitation: 20% rain