Yes

you do need a jacket based on the weather in Key West, FL 33040, USA 1 minute ago

Why? Because there are strong winds blowing out there!
81°F27°C & Windy

Wind is 25 mph41 km/h from the Northeast, gusting to 30 mph49 km/h
October 25
5am81°F27°C26 mph42 km/h NortheastWindy
6am80°F27°C25 mph41 km/h NortheastWindy
7am80°F27°C25 mph40 km/h NortheastWindy
8am80°F27°C25 mph40 km/h NortheastWindy
9am80°F27°C25 mph39 km/h NortheastWindy
10am80°F26°C24 mph38 km/h NortheastWindy
11am80°F27°C25 mph40 km/h NortheastWindy
12pm80°F27°C25 mph40 km/h NortheastWindy
1pm80°F27°C24 mph39 km/h NortheastWindy
2pm81°F27°C24 mph39 km/h NortheastWindy
3pm81°F27°C24 mph39 km/h NortheastWindy
4pm82°F28°C24 mph39 km/h NortheastWindy
DateLowHighWindDayNight
October 2580°F26°C82°F28°C25 mph39 km/h from NortheastWindyWindy
October 2681°F27°C82°F28°C21 mph35 km/h from EastWindyDrizzle
October 2781°F27°C82°F28°C12 mph19 km/h from EastMostly ClearMostly Clear
October 2880°F27°C81°F27°C13 mph21 km/h from NorthMostly ClearWindy
October 2978°F26°C80°F27°C14 mph23 km/h from NorthMostly ClearWindy
October 3075°F24°C80°F26°C19 mph31 km/h from NorthwestWindyWindy
October 3174°F23°C75°F24°C16 mph25 km/h from NorthwestWindyMostly Clear

No

Low of 81°F27°C, High of 82°F28°C
Wind: 21 mph35 km/h
Precipitation: None

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