Yes

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

Why? Because looks like it's raining!
68°F20°C & Rain

Wind is 2 mph4 km/h from the South, gusting to 7 mph11 km/h
October 27
9am68°F20°C3 mph4 km/h SouthThunderstorms
10am67°F20°C5 mph8 km/h EastThunderstorms
11am67°F20°C4 mph7 km/h EastThunderstorms
12pm67°F20°C4 mph7 km/h NortheastRain
1pm68°F20°C5 mph8 km/h NortheastRain
2pm70°F21°C4 mph7 km/h NortheastDrizzle
3pm72°F22°C4 mph7 km/h NortheastPartly Cloudy
4pm75°F24°C3 mph5 km/h NorthPartly Cloudy
5pm77°F25°C4 mph6 km/h NorthwestPartly Cloudy
6pm78°F26°C4 mph7 km/h NorthwestPartly Cloudy
7pm79°F26°C5 mph8 km/h NorthwestPartly Cloudy
8pm79°F26°C5 mph8 km/h NorthwestMostly Clear
DateLowHighWindDayNight
October 2764°F18°C79°F26°C5 mph8 km/h from NorthwestRainPartly Cloudy
October 2859°F15°C73°F23°C8 mph13 km/h from NorthPartly CloudyDrizzle
October 2954°F12°C70°F21°C14 mph22 km/h from WestDrizzleMostly Clear
October 3050°F10°C64°F18°C12 mph19 km/h from NorthwestPartly CloudyMostly Clear
October 3145°F7°C67°F20°C5 mph8 km/h from NorthwestClearClear
November 146°F8°C69°F21°C5 mph9 km/h from SouthwestClearPartly Cloudy
November 250°F10°C69°F21°C7 mph12 km/h from NorthwestMostly ClearMostly Clear

No

Low of 59°F15°C, High of 73°F23°C
Wind: 8 mph13 km/h
Precipitation: None

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