Yes

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

Why? Because it's really really huffing out there!
77°F25°C & Windy

Wind is 19 mph30 km/h from the West, gusting to 34 mph55 km/h
July 17
2pm77°F25°C17 mph28 km/h WestWindy
3pm78°F26°C16 mph25 km/h WestWindy
4pm79°F26°C16 mph26 km/h WestWindy
5pm78°F26°C14 mph23 km/h WestMostly Cloudy
6pm77°F25°C12 mph19 km/h WestMostly Cloudy
7pm75°F24°C12 mph19 km/h NorthwestMostly Cloudy
8pm73°F23°C11 mph18 km/h NorthwestPartly Cloudy
9pm71°F22°C10 mph16 km/h NorthwestPartly Cloudy
10pm69°F20°C9 mph14 km/h NorthwestMostly Cloudy
11pm67°F19°C8 mph13 km/h NorthwestMostly Cloudy
July 18
12am66°F19°C8 mph12 km/h NorthwestMostly Cloudy
1am64°F18°C7 mph11 km/h NorthwestMostly Cloudy
DateLowHighWindDayNight
July 1766°F19°C79°F26°C15 mph24 km/h from WestMostly CloudyPartly Cloudy
July 1859°F15°C78°F25°C4 mph7 km/h from NortheastClearMostly Clear
July 1959°F15°C80°F27°C5 mph8 km/h from SouthwestPartly CloudyRain
July 2066°F19°C79°F26°C7 mph11 km/h from NorthwestPartly CloudyMostly Clear
July 2161°F16°C75°F24°C7 mph11 km/h from NorthMostly ClearClear
July 2256°F13°C79°F26°C4 mph6 km/h from SoutheastMostly ClearMostly Clear
July 2364°F18°C83°F29°C7 mph11 km/h from SouthwestMostly ClearPartly Cloudy

No

Low of 59°F15°C, High of 78°F26°C
Wind: 4 mph7 km/h
Precipitation: None

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