Yes

you do need a jacket based on the weather in Colorado, USA 1 second ago

Why? Because it's cool. Pleasantly cool, but cool!
56°F13°C & Clear

Wind is 8 mph13 km/h from the Northwest, gusting to 15 mph24 km/h
June 28
11am56°F13°C8 mph13 km/h NorthwestClear
12pm59°F15°C8 mph14 km/h NorthwestClear
1pm61°F16°C8 mph13 km/h NorthwestMostly Clear
2pm63°F17°C8 mph13 km/h WestMostly Clear
3pm64°F18°C6 mph9 km/h WestPartly Cloudy
4pm64°F18°C7 mph10 km/h NorthwestPartly Cloudy
5pm63°F17°C7 mph11 km/h NorthwestCloudy
6pm62°F17°C3 mph5 km/h WestMostly Cloudy
7pm61°F16°C6 mph9 km/h SouthMostly Cloudy
8pm60°F15°C4 mph7 km/h SouthMostly Cloudy
9pm57°F14°C5 mph8 km/h EastMostly Cloudy
10pm54°F12°C3 mph5 km/h SoutheastMostly Cloudy
DateLowHighWindDayNight
June 2844°F7°C64°F18°C7 mph11 km/h from WestPartly CloudyMostly Clear
June 2941°F5°C62°F17°C4 mph6 km/h from WestPartly CloudyMostly Clear
June 3040°F5°C60°F15°C4 mph7 km/h from SoutheastPartly CloudyMostly Cloudy
July 141°F5°C62°F17°C3 mph5 km/h from NorthMostly CloudyPartly Cloudy
July 242°F5°C64°F18°C4 mph7 km/h from EastPartly CloudyMostly Cloudy
July 342°F6°C63°F17°C4 mph6 km/h from SouthMostly CloudyMostly Cloudy
July 443°F6°C60°F15°C6 mph10 km/h from NorthwestMostly CloudyPartly Cloudy

Yes

Low of 41°F5°C, High of 63°F17°C
Wind: 4 mph6 km/h
Precipitation: 7% rain

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