Yes

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

Why? Because it's quite chilly.
42°F6°C & Partly Cloudy

Wind is 3 mph5 km/h from the SW, gusting to 9 mph15 km/h
March 29
8am42°F6°C4 mph6 km/h SWPartly Cloudy
9am45°F7°C3 mph5 km/h WMostly Clear
10am49°F9°C5 mph8 km/h WMostly Clear
11am52°F11°C6 mph9 km/h WPartly Cloudy
12pm56°F13°C7 mph12 km/h WMostly Cloudy
1pm60°F15°C8 mph12 km/h WMostly Cloudy
2pm63°F17°C9 mph14 km/h WPartly Cloudy
3pm66°F19°C10 mph15 km/h WPartly Cloudy
4pm67°F20°C10 mph16 km/h WMostly Clear
5pm68°F20°C10 mph16 km/h WMostly Clear
6pm67°F20°C9 mph14 km/h WMostly Clear
7pm65°F18°C6 mph9 km/h WPartly Cloudy
DateLowHighWindDayNight
March 2942°F6°C68°F20°C7 mph11 km/h from WPartly CloudyMostly Cloudy
March 3048°F9°C70°F21°C12 mph20 km/h from SWRainMostly Cloudy
March 3146°F8°C67°F20°C5 mph9 km/h from EDrizzleRain
April 160°F16°C71°F22°C9 mph14 km/h from SWRainRain
April 248°F9°C65°F19°C10 mph17 km/h from WRainDrizzle
April 336°F2°C48°F9°C13 mph21 km/h from WDrizzlePartly Cloudy
April 432°F-0°C48°F9°C12 mph20 km/h from NWPartly CloudyMostly Clear

Yes

Low of 48°F9°C, High of 70°F21°C
Wind: 12 mph20 km/h
Precipitation: 59% rain

Support This Page