Yes

you do need a jacket based on the weather in La Porte, IN 46350, USA 1 second ago

Why? Because it's cool. Pleasantly cool, but cool!
58°F15°C & Clear

Wind is 7 mph11 km/h from the Southwest, gusting to 12 mph20 km/h
August 27
10am61°F16°C7 mph11 km/h SouthwestClear
11am66°F19°C7 mph11 km/h SouthwestClear
12pm70°F21°C7 mph11 km/h SouthwestClear
1pm72°F22°C8 mph12 km/h WestMostly Clear
2pm73°F23°C8 mph12 km/h WestMostly Clear
3pm74°F23°C8 mph13 km/h WestMostly Clear
4pm74°F23°C7 mph11 km/h NorthwestMostly Clear
5pm73°F23°C6 mph10 km/h WestMostly Cloudy
6pm72°F22°C6 mph10 km/h WestMostly Cloudy
7pm70°F21°C6 mph9 km/h SouthwestCloudy
8pm68°F20°C5 mph8 km/h SouthwestPartly Cloudy
9pm65°F18°C5 mph8 km/h SouthwestPartly Cloudy
DateLowHighWindDayNight
August 2747°F8°C74°F23°C7 mph11 km/h from WestMostly ClearRain
August 2857°F14°C72°F22°C10 mph15 km/h from NorthwestRainMostly Clear
August 2948°F9°C68°F20°C7 mph12 km/h from NorthPartly CloudyMostly Clear
August 3048°F9°C70°F21°C4 mph7 km/h from NortheastMostly ClearPartly Cloudy
August 3150°F10°C74°F23°C5 mph9 km/h from EastMostly ClearMostly Clear
September 151°F11°C75°F24°C6 mph9 km/h from EastClearMostly Clear
September 254°F12°C76°F24°C5 mph9 km/h from SouthPartly CloudyMostly Clear

Yes

Low of 57°F14°C, High of 73°F23°C
Wind: 10 mph15 km/h
Precipitation: 49% rain

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