Yes

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

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet and the wind is harsh and biting!
45°F7°C & Clear

Wind is 11 mph18 km/h from the Northwest, gusting to 21 mph34 km/h
November 25
1pm46°F8°C11 mph18 km/h NorthwestClear
2pm47°F8°C11 mph17 km/h NorthwestClear
3pm46°F8°C9 mph15 km/h NorthwestClear
4pm44°F7°C7 mph11 km/h NorthwestClear
5pm42°F6°C6 mph10 km/h NorthwestClear
6pm41°F5°C6 mph9 km/h NorthClear
7pm39°F4°C6 mph10 km/h NorthClear
8pm38°F3°C5 mph9 km/h NorthClear
9pm38°F3°C6 mph9 km/h NorthMostly Clear
10pm37°F3°C5 mph8 km/h NorthPartly Cloudy
11pm36°F2°C5 mph7 km/h NorthMostly Clear
November 26
12am36°F2°C4 mph7 km/h NorthPartly Cloudy
DateLowHighWindDayNight
November 2532°F0°C47°F8°C8 mph13 km/h from NorthwestClearMostly Clear
November 2633°F1°C47°F9°C7 mph12 km/h from SoutheastRainMostly Clear
November 2735°F2°C45°F7°C11 mph18 km/h from WestMostly ClearMostly Cloudy
November 2834°F1°C44°F7°C9 mph14 km/h from EastRainRain
November 2934°F1°C44°F6°C9 mph15 km/h from WestPartly CloudyPartly Cloudy
November 3031°F-1°C40°F4°C12 mph19 km/h from WestMostly ClearMostly Clear
December 127°F-3°C37°F3°C8 mph14 km/h from WestMostly ClearPartly Cloudy

Yes

Low of 33°F1°C, High of 47°F9°C
Wind: 7 mph12 km/h
Precipitation: 70% rain

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