Yes

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

Why? Because it feels like an icebox out there!
26°F-4°C & Mostly Clear

Wind is 2 mph4 km/h from the Southeast, gusting to 4 mph7 km/h
January 13
7am26°F-4°C3 mph5 km/h SoutheastClear
8am26°F-3°C4 mph6 km/h SoutheastClear
9am29°F-1°C4 mph6 km/h SouthMostly Clear
10am33°F0°C4 mph7 km/h SouthMostly Clear
11am35°F2°C5 mph7 km/h SouthPartly Cloudy
12pm37°F3°C5 mph8 km/h SouthMostly Cloudy
1pm39°F4°C5 mph8 km/h SouthMostly Cloudy
2pm40°F4°C5 mph9 km/h SouthwestPartly Cloudy
3pm39°F4°C6 mph10 km/h WestMostly Cloudy
4pm38°F3°C5 mph8 km/h WestMostly Cloudy
5pm35°F2°C5 mph7 km/h WestMostly Cloudy
6pm34°F1°C6 mph10 km/h WestMostly Cloudy
DateLowHighWindDayNight
January 1326°F-4°C40°F4°C5 mph8 km/h from SouthwestPartly CloudyMostly Clear
January 1420°F-7°C28°F-2°C11 mph18 km/h from WestPartly CloudyPartly Cloudy
January 1516°F-9°C26°F-3°C11 mph18 km/h from NorthwestClearClear
January 1614°F-10°C28°F-2°C5 mph8 km/h from SouthwestMostly CloudyPartly Cloudy
January 1718°F-8°C36°F2°C6 mph9 km/h from SouthwestMostly CloudyMostly Cloudy
January 1830°F-1°C40°F4°C7 mph11 km/h from SouthwestDrizzleDrizzle
January 1928°F-2°C37°F3°C4 mph7 km/h from NorthwestMostly CloudySnow

Yes

Low of 20°F-7°C, High of 28°F-3°C
Wind: 11 mph18 km/h
Precipitation: None

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