Yes

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

Why? Because it's bitterly cold.
47°F8°C & Clear

Wind is 6 mph9 km/h from the S, gusting to 12 mph20 km/h
April 23
11pm45°F7°C6 mph9 km/h SClear
April 24
12am43°F6°C6 mph10 km/h SClear
1am42°F6°C6 mph9 km/h SClear
2am41°F5°C6 mph10 km/h SClear
3am40°F5°C7 mph11 km/h SClear
4am39°F4°C7 mph11 km/h SClear
5am38°F3°C7 mph11 km/h SClear
6am37°F3°C6 mph10 km/h SClear
7am36°F2°C6 mph10 km/h SClear
8am36°F2°C6 mph10 km/h SClear
9am37°F3°C6 mph9 km/h SClear
10am41°F5°C5 mph7 km/h SClear
DateLowHighWindDayNight
April 2336°F2°C58°F15°C7 mph11 km/h from SWMostly ClearClear
April 2436°F2°C57°F14°C8 mph12 km/h from SWClearMostly Clear
April 2530°F-1°C46°F8°C9 mph15 km/h from SWPartly CloudyMostly Cloudy
April 2627°F-3°C42°F6°C8 mph13 km/h from WMostly CloudyMostly Cloudy
April 2726°F-3°C36°F2°C5 mph8 km/h from NWSnowHaze
April 2825°F-4°C38°F3°C5 mph8 km/h from NWMostly CloudyMostly Clear
April 2922°F-6°C47°F8°C5 mph7 km/h from WMostly ClearClear

Yes

Low of 36°F2°C, High of 57°F14°C
Wind: 8 mph12 km/h
Precipitation: None

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