Yes

you do need a jacket based on the weather in Dayton, OH, USA 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
57°F14°C & Cloudy

Wind is 4 mph6 km/h from the East, gusting to 6 mph10 km/h
October 25
9pm56°F13°C4 mph7 km/h EastCloudy
10pm55°F13°C5 mph7 km/h EastCloudy
11pm51°F11°C4 mph6 km/h EastCloudy
October 26
12am49°F9°C4 mph7 km/h EastCloudy
1am47°F8°C4 mph6 km/h EastPartly Cloudy
2am45°F7°C4 mph7 km/h EastPartly Cloudy
3am43°F6°C4 mph6 km/h EastMostly Cloudy
4am42°F5°C3 mph6 km/h NortheastMostly Cloudy
5am42°F6°C4 mph7 km/h NortheastMostly Cloudy
6am41°F5°C5 mph7 km/h NortheastMostly Cloudy
7am40°F5°C5 mph7 km/h NortheastMostly Cloudy
8am40°F4°C4 mph7 km/h EastMostly Cloudy
DateLowHighWindDayNight
October 2536°F2°C57°F14°C2 mph3 km/h from EastCloudyMostly Cloudy
October 2639°F4°C60°F15°C8 mph13 km/h from EastPartly CloudyMostly Cloudy
October 2739°F4°C60°F15°C9 mph14 km/h from EastMostly CloudyMostly Cloudy
October 2843°F6°C57°F14°C9 mph14 km/h from EastCloudyDrizzle
October 2942°F6°C54°F12°C13 mph21 km/h from EastRainRain
October 3044°F7°C52°F11°C13 mph21 km/h from NorthRainRain
October 3141°F5°C52°F11°C14 mph22 km/h from WestMostly CloudyPartly Cloudy

Yes

Low of 39°F4°C, High of 60°F16°C
Wind: 8 mph13 km/h
Precipitation: None

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