Yes

you do need a jacket based on the weather in Redlands, CA 92373, USA 1 second ago

Why? Because it's pretty chilly!
51°F11°C & Cloudy

Wind is 6 mph10 km/h from the South, gusting to 9 mph15 km/h
May 4
1pm51°F11°C7 mph11 km/h SouthCloudy
2pm52°F11°C6 mph9 km/h SouthCloudy
3pm54°F12°C4 mph7 km/h SouthwestCloudy
4pm55°F13°C3 mph5 km/h WestCloudy
5pm56°F13°C5 mph9 km/h NorthwestCloudy
6pm56°F14°C4 mph7 km/h WestCloudy
7pm57°F14°C5 mph8 km/h WestCloudy
8pm57°F14°C5 mph8 km/h WestCloudy
9pm56°F13°C4 mph6 km/h WestCloudy
10pm55°F13°C3 mph5 km/h NorthwestCloudy
11pm54°F12°C3 mph4 km/h SouthCloudy
May 5
12am54°F12°C3 mph4 km/h SouthDrizzle
DateLowHighWindDayNight
May 450°F10°C57°F14°C5 mph8 km/h from SouthwestThunderstormsDrizzle
May 551°F10°C62°F17°C4 mph6 km/h from SouthwestCloudyMostly Cloudy
May 651°F11°C69°F21°C4 mph7 km/h from WestPartly CloudyPartly Cloudy
May 753°F12°C75°F24°C4 mph7 km/h from WestMostly ClearClear
May 855°F13°C84°F29°C4 mph7 km/h from WestMostly ClearMostly Clear
May 961°F16°C88°F31°C5 mph8 km/h from WestMostly ClearClear
May 1062°F17°C91°F33°C5 mph8 km/h from WestMostly ClearMostly Clear

Yes

Low of 51°F11°C, High of 63°F17°C
Wind: 4 mph6 km/h
Precipitation: None

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