Yes

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

Why? Because there's a refreshing nip in the air!
47°F9°C & Cloudy

Wind is 5 mph8 km/h from the West, gusting to 11 mph17 km/h
May 20
12am47°F8°C5 mph8 km/h WestDrizzle
1am46°F8°C5 mph8 km/h WestDrizzle
2am45°F7°C4 mph7 km/h WestDrizzle
3am44°F7°C4 mph7 km/h WestDrizzle
4am43°F6°C4 mph7 km/h WestDrizzle
5am43°F6°C4 mph7 km/h WestDrizzle
6am42°F6°C4 mph7 km/h SouthwestDrizzle
7am42°F5°C4 mph6 km/h SouthwestCloudy
8am41°F5°C4 mph6 km/h SouthwestCloudy
9am41°F5°C4 mph6 km/h SouthwestCloudy
10am41°F5°C3 mph5 km/h SouthwestCloudy
11am42°F5°C3 mph5 km/h SouthwestCloudy
DateLowHighWindDayNight
May 1943°F6°C50°F10°C5 mph8 km/h from WestDrizzleDrizzle
May 2041°F5°C51°F11°C3 mph5 km/h from NorthwestRainMostly Cloudy
May 2140°F5°C56°F13°C6 mph10 km/h from SouthCloudyPartly Cloudy
May 2240°F5°C58°F14°C4 mph7 km/h from SouthMostly CloudyMostly Cloudy
May 2342°F6°C58°F14°C4 mph6 km/h from WestMostly CloudyMostly Cloudy
May 2444°F7°C58°F14°C4 mph7 km/h from NorthwestDrizzleMostly Cloudy
May 2544°F6°C60°F16°C5 mph7 km/h from SoutheastMostly CloudyMostly Clear

Yes

Low of 41°F5°C, High of 52°F11°C
Wind: 3 mph5 km/h
Precipitation: 32% rain

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