Yes

you do need a jacket based on the weather in Palatine, IL, USA 1 second ago

Why? Because it's fairly windy outside!
69°F20°C & Mostly Cloudy

Wind is 10 mph16 km/h from the West, gusting to 20 mph32 km/h
August 24
1pm70°F21°C12 mph19 km/h WestMostly Clear
2pm71°F22°C13 mph20 km/h NorthwestPartly Cloudy
3pm72°F22°C12 mph20 km/h NorthwestPartly Cloudy
4pm72°F22°C12 mph20 km/h NorthwestPartly Cloudy
5pm72°F22°C13 mph20 km/h NorthwestPartly Cloudy
6pm71°F22°C13 mph21 km/h NorthwestMostly Clear
7pm69°F21°C12 mph19 km/h NorthwestMostly Clear
8pm67°F20°C10 mph17 km/h NorthwestMostly Clear
9pm65°F18°C8 mph14 km/h NorthwestMostly Clear
10pm63°F17°C8 mph12 km/h NorthwestMostly Clear
11pm61°F16°C7 mph11 km/h NorthwestMostly Clear
August 25
12am59°F15°C7 mph11 km/h NorthwestMostly Clear
DateLowHighWindDayNight
August 2457°F14°C72°F22°C10 mph16 km/h from NorthwestMostly ClearMostly Clear
August 2554°F12°C69°F21°C10 mph16 km/h from NorthwestMostly ClearMostly Clear
August 2652°F11°C70°F21°C8 mph13 km/h from NorthwestPartly CloudyClear
August 2752°F11°C75°F24°C6 mph10 km/h from WestPartly CloudyPartly Cloudy
August 2859°F15°C75°F24°C6 mph9 km/h from WestDrizzlePartly Cloudy
August 2962°F17°C74°F23°C7 mph12 km/h from NortheastPartly CloudyMostly Clear
August 3059°F15°C73°F23°C6 mph10 km/h from SoutheastPartly CloudyMostly Cloudy

Yes

Low of 54°F12°C, High of 69°F21°C
Wind: 10 mph16 km/h
Precipitation: 4% rain

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