Yes

you do need a jacket based on the weather in Portland, ME 04101, USA 1 second ago

Why? Because too cold for just a hoodie, too warm for a parka!
42°F5°C & Mostly Cloudy

Wind is 6 mph9 km/h from the North, gusting to 9 mph15 km/h
October 30
7am42°F5°C6 mph10 km/h NorthMostly Cloudy
8am42°F5°C6 mph10 km/h NorthMostly Cloudy
9am41°F5°C6 mph10 km/h NorthMostly Cloudy
10am41°F5°C7 mph11 km/h NorthMostly Cloudy
11am42°F5°C6 mph10 km/h NorthMostly Cloudy
12pm42°F6°C6 mph10 km/h NortheastCloudy
1pm44°F6°C8 mph13 km/h NortheastCloudy
2pm45°F7°C7 mph11 km/h NortheastCloudy
3pm47°F8°C7 mph12 km/h NortheastCloudy
4pm49°F9°C8 mph14 km/h NortheastCloudy
5pm51°F10°C10 mph17 km/h EastCloudy
6pm52°F11°C13 mph20 km/h EastCloudy
DateLowHighWindDayNight
October 3040°F5°C54°F12°C11 mph17 km/h from EastCloudyRain
October 3147°F8°C60°F16°C15 mph24 km/h from SouthwestRainWindy
November 140°F5°C52°F11°C15 mph25 km/h from WestWindyMostly Clear
November 238°F3°C49°F10°C5 mph8 km/h from WestPartly CloudyMostly Clear
November 336°F2°C54°F12°C11 mph17 km/h from SouthwestPartly CloudyDrizzle
November 442°F5°C54°F12°C14 mph22 km/h from WestMostly ClearMostly Clear
November 539°F4°C53°F11°C9 mph15 km/h from WestPartly CloudyMostly Cloudy

Yes

Low of 46°F8°C, High of 61°F16°C
Wind: 15 mph24 km/h
Precipitation: 89% rain

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