Yes

you do need a jacket based on the weather in Cortland, NY 13045, USA 1 second ago

Why? Because rain's coming down and just cool enough for a jacket, but not warm enough to ditch it and it's fairly windy outside!
55°F13°C & Rain

Wind is 11 mph17 km/h from the Northeast, gusting to 25 mph40 km/h
October 13
7pm55°F13°C10 mph17 km/h NortheastDrizzle
8pm54°F12°C9 mph15 km/h NortheastDrizzle
9pm54°F12°C8 mph13 km/h NortheastDrizzle
10pm53°F12°C8 mph12 km/h NortheastDrizzle
11pm52°F11°C8 mph12 km/h NortheastDrizzle
October 14
12am52°F11°C8 mph12 km/h NortheastDrizzle
1am52°F11°C7 mph11 km/h NortheastCloudy
2am51°F11°C6 mph10 km/h NortheastCloudy
3am51°F11°C5 mph8 km/h NortheastCloudy
4am51°F10°C5 mph8 km/h NortheastDrizzle
5am51°F10°C5 mph8 km/h NortheastCloudy
6am50°F10°C4 mph7 km/h NortheastCloudy
DateLowHighWindDayNight
October 1349°F10°C55°F13°C8 mph13 km/h from NortheastRainDrizzle
October 1448°F9°C62°F17°C7 mph11 km/h from NorthMostly CloudyPartly Cloudy
October 1541°F5°C53°F11°C11 mph18 km/h from NorthMostly CloudyMostly Clear
October 1636°F2°C51°F10°C10 mph17 km/h from NorthwestMostly ClearMostly Clear
October 1735°F2°C54°F12°C5 mph7 km/h from NorthwestMostly ClearMostly Cloudy
October 1845°F7°C64°F18°C6 mph10 km/h from SouthPartly CloudyMostly Clear
October 1954°F12°C69°F20°C11 mph17 km/h from SouthRainRain

Yes

Low of 48°F9°C, High of 62°F17°C
Wind: 7 mph11 km/h
Precipitation: None

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