Yes
you do need a jacket based on the weather in Boulder, CO 80303, USA 1 second ago
Why? Because it's quite chilly!
48°F9°C & Clear
Wind is 4 mph6 km/h from the Southwest, gusting to 7 mph11 km/h
| September 18 | ||||
| 5am | 46°F8°C | 4 mph6 km/h Southwest | Partly Cloudy | |
| 6am | 46°F8°C | 4 mph7 km/h Southwest | Partly Cloudy | |
| 7am | 46°F8°C | 4 mph7 km/h Southwest | Mostly Clear | |
| 8am | 46°F8°C | 4 mph6 km/h Southwest | Partly Cloudy | |
| 9am | 46°F8°C | 3 mph5 km/h West | Clear | |
| 10am | 50°F10°C | 3 mph5 km/h Northwest | Clear | |
| 11am | 56°F13°C | 2 mph3 km/h North | Clear | |
| 12pm | 60°F15°C | 4 mph6 km/h East | Clear | |
| 1pm | 63°F17°C | 4 mph7 km/h East | Clear | |
| 2pm | 66°F19°C | 5 mph8 km/h East | Clear | |
| 3pm | 68°F20°C | 6 mph10 km/h East | Clear | |
| 4pm | 69°F21°C | 6 mph10 km/h East | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 46°F8°C | 71°F21°C | 5 mph7 km/h from East | Clear | Mostly Clear |
| September 19 | 49°F9°C | 77°F25°C | 5 mph8 km/h from East | Partly Cloudy | Mostly Cloudy |
| September 20 | 54°F12°C | 78°F26°C | 5 mph8 km/h from Northwest | Mostly Cloudy | Mostly Clear |
| September 21 | 57°F14°C | 79°F26°C | 6 mph10 km/h from West | Mostly Clear | Partly Cloudy |
| September 22 | 51°F11°C | 72°F22°C | 7 mph12 km/h from Northwest | Partly Cloudy | Clear |
| September 23 | 46°F8°C | 72°F22°C | 5 mph8 km/h from Northeast | Clear | Clear |
| September 24 | 46°F8°C | 73°F23°C | 5 mph8 km/h from East | Clear | Clear |
Yes
Low of 49°F10°C, High of 77°F25°CWind: 5 mph8 km/h
Precipitation: None