Yes

you do need a jacket based on the weather in Czechia 1 second ago

Why? Because too cold for just a hoodie, too warm for a parka and the wind is offering free, unsolicited face massages!
50°F10°C & Mostly Cloudy

Wind is 12 mph19 km/h from the Northwest, gusting to 24 mph39 km/h
November 3
1pm50°F10°C12 mph19 km/h NorthwestMostly Cloudy
2pm50°F10°C11 mph18 km/h WestPartly Cloudy
3pm49°F9°C9 mph15 km/h WestPartly Cloudy
4pm46°F8°C7 mph12 km/h WestMostly Clear
5pm44°F7°C6 mph10 km/h WestClear
6pm43°F6°C6 mph9 km/h WestMostly Clear
7pm42°F6°C6 mph9 km/h SouthwestMostly Clear
8pm42°F5°C5 mph9 km/h SouthwestMostly Clear
9pm41°F5°C5 mph8 km/h SouthwestClear
10pm40°F5°C5 mph8 km/h SouthwestClear
11pm41°F5°C5 mph8 km/h SouthwestPartly Cloudy
November 4
12am41°F5°C5 mph7 km/h SouthwestPartly Cloudy
DateLowHighWindDayNight
November 240°F5°C50°F10°C11 mph18 km/h from WestRainMostly Clear
November 339°F4°C54°F12°C3 mph5 km/h from SouthwestMostly ClearMostly Clear
November 440°F5°C54°F12°C7 mph12 km/h from SoutheastPartly CloudyMostly Cloudy
November 541°F5°C55°F13°C8 mph14 km/h from SoutheastPartly CloudyPartly Cloudy
November 643°F6°C52°F11°C8 mph13 km/h from SouthPartly CloudyPartly Cloudy
November 740°F4°C51°F10°C5 mph8 km/h from SoutheastPartly CloudyMostly Cloudy
November 840°F4°C48°F9°C4 mph6 km/h from SouthMostly CloudyMostly Cloudy

Yes

Low of 39°F4°C, High of 54°F12°C
Wind: 3 mph5 km/h
Precipitation: None

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