Yes

you do need a jacket based on the weather in 100 Nicolls Rd, Stony Brook, NY 11794, USA 1 second ago

Why? Because it's so gusty, you’re basically doing accidental parkour!
64°F18°C & Clear

Wind is 8 mph13 km/h from the Northeast, gusting to 21 mph33 km/h
September 20
2am64°F18°C10 mph15 km/h NortheastClear
3am62°F17°C9 mph15 km/h NortheastMostly Clear
4am61°F16°C10 mph15 km/h NortheastClear
5am59°F15°C8 mph14 km/h NortheastClear
6am58°F15°C10 mph15 km/h NortheastClear
7am58°F14°C10 mph15 km/h NortheastClear
8am59°F15°C11 mph18 km/h NortheastPartly Cloudy
9am62°F17°C12 mph19 km/h NortheastMostly Clear
10am64°F18°C11 mph18 km/h NortheastMostly Clear
11am67°F19°C11 mph17 km/h NortheastClear
12pm69°F20°C10 mph16 km/h NortheastClear
1pm70°F21°C9 mph14 km/h NortheastClear
DateLowHighWindDayNight
September 2058°F14°C72°F22°C9 mph15 km/h from NortheastClearPartly Cloudy
September 2155°F13°C69°F21°C8 mph13 km/h from EastMostly CloudyMostly Clear
September 2255°F13°C72°F22°C4 mph7 km/h from SoutheastMostly ClearPartly Cloudy
September 2364°F18°C79°F26°C9 mph14 km/h from SouthwestPartly CloudyDrizzle
September 2464°F18°C77°F25°C5 mph8 km/h from NorthPartly CloudyMostly Cloudy
September 2561°F16°C71°F22°C9 mph14 km/h from NortheastMostly CloudyDrizzle
September 2660°F16°C73°F23°C7 mph11 km/h from SouthDrizzleRain

Yes

Low of 55°F13°C, High of 69°F21°C
Wind: 8 mph13 km/h
Precipitation: None

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