Yes

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

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
45°F7°C & Mostly Cloudy

Wind is 2 mph3 km/h from the Northeast, gusting to 6 mph9 km/h
September 17
1pm45°F7°C2 mph4 km/h NortheastMostly Clear
2pm48°F9°C2 mph3 km/h NorthMostly Clear
3pm50°F10°C2 mph3 km/h NorthwestMostly Clear
4pm52°F11°C3 mph4 km/h WestMostly Clear
5pm54°F12°C4 mph6 km/h SouthwestMostly Clear
6pm55°F13°C4 mph7 km/h SouthwestClear
7pm56°F14°C4 mph7 km/h SouthwestClear
8pm57°F14°C4 mph6 km/h SouthwestClear
9pm58°F14°C3 mph6 km/h SouthwestClear
10pm57°F14°C3 mph4 km/h SouthClear
11pm56°F13°C2 mph3 km/h SouthMostly Clear
September 18
12am54°F12°C2 mph3 km/h SoutheastMostly Cloudy
DateLowHighWindDayNight
September 1743°F6°C58°F14°C3 mph5 km/h from SouthwestMostly ClearDrizzle
September 1846°F8°C57°F14°C3 mph5 km/h from NorthDrizzleDrizzle
September 1947°F8°C55°F13°C5 mph8 km/h from NorthDrizzleDrizzle
September 2048°F9°C57°F14°C3 mph5 km/h from WestDrizzleMostly Cloudy
September 2148°F9°C55°F13°C3 mph5 km/h from NorthDrizzleDrizzle
September 2247°F8°C54°F12°C4 mph6 km/h from NorthDrizzleCloudy
September 2344°F7°C55°F13°C5 mph7 km/h from NorthMostly CloudyMostly Cloudy

Yes

Low of 46°F8°C, High of 56°F14°C
Wind: 3 mph5 km/h
Precipitation: 69% rain

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