No
you don't need a jacket based on the weather in Boulder, CO, USA 1 second ago
66°F19°C & Partly Cloudy
Wind is 4 mph6 km/h from the West, gusting to 5 mph8 km/h
| September 12 | ||||
| 2am | 65°F18°C | 4 mph6 km/h West | Mostly Clear | |
| 3am | 64°F18°C | 6 mph9 km/h West | Mostly Clear | |
| 4am | 63°F17°C | 4 mph7 km/h Southwest | Clear | |
| 5am | 62°F17°C | 6 mph10 km/h Southwest | Mostly Clear | |
| 6am | 61°F16°C | 6 mph10 km/h West | Mostly Cloudy | |
| 7am | 63°F17°C | 8 mph13 km/h West | Mostly Cloudy | |
| 8am | 63°F17°C | 5 mph8 km/h West | Mostly Cloudy | |
| 9am | 62°F17°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| 10am | 66°F19°C | 4 mph6 km/h Southwest | Cloudy | |
| 11am | 70°F21°C | 2 mph4 km/h Southwest | Mostly Cloudy | |
| 12pm | 73°F23°C | 3 mph5 km/h Northwest | Mostly Cloudy | |
| 1pm | 75°F24°C | 4 mph7 km/h Northeast | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 11 | 62°F17°C | 86°F30°C | 3 mph6 km/h from East | Partly Cloudy | Partly Cloudy |
| September 12 | 61°F16°C | 76°F24°C | 5 mph7 km/h from West | Cloudy | Partly Cloudy |
| September 13 | 56°F13°C | 71°F22°C | 5 mph9 km/h from Southwest | Mostly Cloudy | Drizzle |
| September 14 | 52°F11°C | 76°F24°C | 5 mph7 km/h from West | Partly Cloudy | Clear |
| September 15 | 56°F13°C | 79°F26°C | 5 mph9 km/h from Southeast | Mostly Clear | Mostly Clear |
| September 16 | 57°F14°C | 72°F22°C | 4 mph7 km/h from North | Partly Cloudy | Mostly Clear |
| September 17 | 51°F10°C | 69°F21°C | 5 mph7 km/h from East | Mostly Clear | Clear |
No
Low of 61°F16°C, High of 76°F25°CWind: 5 mph7 km/h
Precipitation: 17% rain