Yes

you do need a jacket based on the weather in Graz, Austria 1 second ago

Why? Because it's cool. Pleasantly cool, but cool!
50°F10°C & Mostly Cloudy

Wind is 3 mph5 km/h from the South, gusting to 11 mph18 km/h
October 27
11am51°F11°C4 mph7 km/h SouthMostly Cloudy
12pm53°F11°C5 mph8 km/h SouthMostly Cloudy
1pm53°F12°C4 mph7 km/h SouthMostly Cloudy
2pm53°F12°C3 mph5 km/h SouthPartly Cloudy
3pm52°F11°C2 mph3 km/h SouthPartly Cloudy
4pm50°F10°C2 mph3 km/h WestPartly Cloudy
5pm48°F9°C3 mph4 km/h NorthwestPartly Cloudy
6pm46°F8°C3 mph5 km/h NorthwestMostly Cloudy
7pm45°F7°C4 mph6 km/h NorthwestPartly Cloudy
8pm43°F6°C3 mph6 km/h NorthwestPartly Cloudy
9pm43°F6°C4 mph6 km/h NorthwestMostly Clear
10pm42°F5°C3 mph5 km/h NorthwestMostly Clear
DateLowHighWindDayNight
October 2636°F2°C53°F12°C2 mph4 km/h from SouthMostly CloudyMostly Clear
October 2738°F3°C57°F14°C3 mph4 km/h from SouthPartly CloudyPartly Cloudy
October 2836°F2°C59°F15°C3 mph4 km/h from SouthPartly CloudyMostly Cloudy
October 2945°F7°C64°F18°C2 mph3 km/h from NortheastPartly CloudyMostly Clear
October 3043°F6°C65°F18°C2 mph4 km/h from SoutheastMostly ClearPartly Cloudy
October 3144°F7°C65°F18°C2 mph4 km/h from SoutheastPartly CloudyMostly Cloudy
November 147°F8°C65°F18°C3 mph5 km/h from SouthMostly CloudyRain

Yes

Low of 37°F3°C, High of 57°F14°C
Wind: 3 mph4 km/h
Precipitation: None

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