Yes

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

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
54°F12°C & Partly Cloudy

Wind is 8 mph13 km/h from the Northwest, gusting to 17 mph27 km/h
October 20
5pm54°F12°C8 mph13 km/h NorthwestPartly Cloudy
6pm53°F12°C9 mph14 km/h NorthwestPartly Cloudy
7pm53°F11°C9 mph14 km/h NorthwestMostly Cloudy
8pm52°F11°C9 mph15 km/h NorthwestMostly Cloudy
9pm52°F11°C8 mph14 km/h NorthwestMostly Cloudy
10pm53°F12°C8 mph13 km/h NorthwestCloudy
11pm55°F13°C8 mph13 km/h NorthwestCloudy
October 21
12am57°F14°C9 mph14 km/h NorthwestCloudy
1am59°F15°C9 mph14 km/h NorthwestCloudy
2am60°F16°C9 mph15 km/h NorthwestCloudy
3am61°F16°C9 mph15 km/h NorthwestCloudy
4am61°F16°C9 mph14 km/h NorthwestCloudy
DateLowHighWindDayNight
October 2052°F11°C61°F16°C8 mph13 km/h from NorthwestCloudyCloudy
October 2152°F11°C63°F17°C5 mph8 km/h from NorthwestCloudyCloudy
October 2251°F10°C67°F20°C3 mph5 km/h from NorthwestPartly CloudyMostly Clear
October 2349°F10°C70°F21°C3 mph5 km/h from NorthwestMostly ClearPartly Cloudy
October 2452°F11°C69°F20°C4 mph6 km/h from EastRainRain
October 2558°F14°C68°F20°C5 mph8 km/h from NorthwestDrizzleRain
October 2649°F9°C64°F18°C12 mph20 km/h from NorthwestPartly CloudyDrizzle

Yes

Low of 52°F11°C, High of 63°F17°C
Wind: 5 mph8 km/h
Precipitation: None

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