Yes

you do need a jacket based on the weather in Nagoya, Aichi Prefecture, Japan 1 second ago

Why? Because the cold's there, but it's just a reminder, not an invasion!
43°F6°C & Clear

Wind is 2 mph4 km/h from the Northeast, gusting to 5 mph8 km/h
October 29
9pm42°F6°C3 mph5 km/h NortheastClear
10pm44°F7°C3 mph5 km/h NortheastClear
11pm49°F9°C3 mph5 km/h NortheastClear
October 30
12am54°F12°C2 mph4 km/h NorthClear
1am59°F15°C2 mph4 km/h NorthClear
2am64°F18°C3 mph5 km/h NorthwestClear
3am67°F19°C4 mph6 km/h WestClear
4am68°F20°C4 mph6 km/h SouthwestMostly Clear
5am69°F21°C4 mph7 km/h SouthwestMostly Clear
6am69°F20°C5 mph7 km/h SouthwestMostly Clear
7am67°F20°C4 mph6 km/h SouthwestMostly Clear
8am64°F18°C3 mph4 km/h SouthwestMostly Clear
DateLowHighWindDayNight
October 2942°F6°C69°F21°C3 mph5 km/h from SouthwestMostly ClearCloudy
October 3052°F11°C65°F18°C5 mph8 km/h from NorthRainRain
October 3153°F12°C69°F20°C8 mph12 km/h from NorthwestPartly CloudyMostly Clear
November 152°F11°C68°F20°C6 mph9 km/h from WestPartly CloudyMostly Clear
November 246°F8°C62°F17°C13 mph21 km/h from NorthwestClearMostly Clear
November 341°F5°C63°F17°C3 mph5 km/h from NorthwestPartly CloudyMostly Cloudy
November 449°F10°C65°F18°C3 mph5 km/h from NorthCloudyCloudy

Yes

Low of 52°F11°C, High of 64°F18°C
Wind: 5 mph8 km/h
Precipitation: 86% rain

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