Yes

you do need a jacket based on the weather in Littleton, CO 80120, USA 1 second ago

Why? Because sorry, it's too cool for just a hoodie!
53°F12°C & Partly Cloudy

Wind is 1 mph2 km/h from the South, gusting to 2 mph4 km/h
September 20
7am53°F11°C3 mph4 km/h SouthMostly Cloudy
8am52°F11°C5 mph8 km/h SouthMostly Cloudy
9am52°F11°C5 mph8 km/h SouthMostly Cloudy
10am55°F13°C4 mph6 km/h SouthMostly Cloudy
11am62°F17°C4 mph7 km/h SouthMostly Clear
12pm69°F20°C4 mph6 km/h SouthMostly Clear
1pm73°F23°C2 mph3 km/h WestMostly Clear
2pm75°F24°C4 mph6 km/h NortheastMostly Clear
3pm77°F25°C5 mph8 km/h NortheastMostly Clear
4pm78°F25°C4 mph7 km/h NortheastPartly Cloudy
5pm78°F26°C3 mph4 km/h NortheastPartly Cloudy
6pm78°F26°C4 mph6 km/h SouthPartly Cloudy
DateLowHighWindDayNight
September 2051°F11°C78°F26°C4 mph7 km/h from SouthwestPartly CloudyPartly Cloudy
September 2153°F12°C77°F25°C4 mph6 km/h from WestMostly ClearPartly Cloudy
September 2254°F12°C73°F23°C5 mph8 km/h from NortheastMostly CloudyDrizzle
September 2349°F9°C62°F17°C9 mph15 km/h from NorthMostly CloudyMostly Cloudy
September 2448°F9°C69°F21°C4 mph6 km/h from NortheastMostly ClearClear
September 2546°F8°C75°F24°C4 mph7 km/h from EastClearClear
September 2648°F9°C76°F24°C5 mph9 km/h from EastClearPartly Cloudy

Yes

Low of 53°F12°C, High of 77°F25°C
Wind: 4 mph6 km/h
Precipitation: None

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