Yes

you do need a jacket based on the weather in Cascade-Chipita Park (Cascade), Colorado, United States 1 second ago

Why? Because it's cool. Pleasantly cool, but cool!
57°F14°C & Cloudy

Wind is 8 mph13 km/h from the Northwest, gusting to 15 mph24 km/h
September 13
11am58°F15°C9 mph14 km/h NorthwestPartly Cloudy
12pm60°F16°C9 mph14 km/h NorthwestMostly Cloudy
1pm62°F17°C6 mph9 km/h NorthwestCloudy
2pm63°F17°C3 mph4 km/h SoutheastCloudy
3pm62°F17°C7 mph12 km/h EastCloudy
4pm61°F16°C3 mph5 km/h SoutheastThunderstorms
5pm62°F16°C8 mph12 km/h SoutheastCloudy
6pm63°F17°C7 mph12 km/h SoutheastCloudy
7pm61°F16°C7 mph12 km/h SoutheastMostly Cloudy
8pm59°F15°C4 mph6 km/h SouthMostly Cloudy
9pm56°F13°C4 mph6 km/h SouthwestMostly Cloudy
10pm52°F11°C7 mph12 km/h WestDrizzle
DateLowHighWindDayNight
September 1347°F8°C63°F17°C6 mph10 km/h from EastMostly CloudyPartly Cloudy
September 1443°F6°C62°F17°C6 mph9 km/h from NorthwestPartly CloudyClear
September 1546°F8°C69°F21°C4 mph7 km/h from SouthwestMostly ClearMostly Clear
September 1649°F10°C67°F19°C5 mph8 km/h from WestPartly CloudyMostly Clear
September 1744°F7°C60°F16°C3 mph5 km/h from EastPartly CloudyMostly Clear
September 1842°F6°C63°F17°C3 mph5 km/h from EastClearMostly Clear
September 1944°F7°C65°F18°C4 mph6 km/h from SoutheastPartly CloudyMostly Cloudy

Yes

Low of 43°F6°C, High of 63°F17°C
Wind: 6 mph9 km/h
Precipitation: 10% rain

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