Yes

you do need a jacket based on the weather in Rzeszów, Poland 1 second ago

Why? Because it's so windy, your hat will probably launch into orbit!
64°F18°C & Partly Cloudy

Wind is 14 mph23 km/h from the West, gusting to 27 mph43 km/h
August 24
10am64°F18°C14 mph23 km/h WestPartly Cloudy
11am64°F18°C14 mph22 km/h WestMostly Clear
12pm63°F17°C11 mph18 km/h WestMostly Clear
1pm60°F16°C8 mph12 km/h WestClear
2pm57°F14°C6 mph9 km/h WestClear
3pm55°F13°C6 mph9 km/h SouthwestMostly Clear
4pm54°F12°C6 mph9 km/h SouthwestMostly Clear
5pm52°F11°C6 mph10 km/h SouthwestMostly Clear
6pm52°F11°C6 mph10 km/h SouthwestPartly Cloudy
7pm51°F11°C6 mph10 km/h SouthwestMostly Cloudy
8pm51°F11°C6 mph10 km/h SouthwestMostly Cloudy
9pm51°F11°C6 mph10 km/h SouthwestPartly Cloudy
DateLowHighWindDayNight
August 2348°F9°C64°F18°C14 mph22 km/h from WestPartly CloudyPartly Cloudy
August 2450°F10°C65°F18°C12 mph19 km/h from WestPartly CloudyMostly Cloudy
August 2552°F11°C69°F20°C8 mph13 km/h from WestPartly CloudyMostly Cloudy
August 2653°F12°C73°F23°C3 mph5 km/h from SouthPartly CloudyMostly Clear
August 2757°F14°C81°F27°C12 mph20 km/h from SouthMostly ClearPartly Cloudy
August 2871°F21°C84°F29°C16 mph26 km/h from SouthWindyMostly Cloudy
August 2963°F17°C77°F25°C13 mph22 km/h from SouthMostly CloudyDrizzle

Yes

Low of 50°F10°C, High of 65°F19°C
Wind: 12 mph19 km/h
Precipitation: 10% rain

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