Yes

you do need a jacket based on the weather in San Bernardino, CA 92410, USA 1 second ago

Why? Because sorry, it's too cool for just a hoodie!
59°F15°C & Mostly Clear

Wind is 2 mph3 km/h from the Southwest, gusting to 6 mph10 km/h
June 25
7am58°F15°C2 mph4 km/h SouthwestPartly Cloudy
8am59°F15°C2 mph3 km/h SouthMostly Cloudy
9am59°F15°C2 mph3 km/h SouthMostly Cloudy
10am60°F15°C2 mph3 km/h SouthPartly Cloudy
11am62°F17°C2 mph3 km/h SouthPartly Cloudy
12pm65°F18°C2 mph3 km/h SouthwestMostly Clear
1pm70°F21°C2 mph4 km/h SouthwestClear
2pm76°F24°C4 mph6 km/h SouthwestClear
3pm81°F27°C4 mph7 km/h SouthwestClear
4pm85°F30°C6 mph9 km/h SouthwestClear
5pm88°F31°C7 mph11 km/h SouthwestClear
6pm89°F32°C8 mph13 km/h SouthwestClear
DateLowHighWindDayNight
June 2558°F15°C89°F32°C5 mph9 km/h from SouthwestClearClear
June 2661°F16°C91°F33°C5 mph9 km/h from SouthwestClearClear
June 2764°F18°C93°F34°C6 mph9 km/h from SouthwestClearClear
June 2864°F18°C92°F33°C5 mph9 km/h from SouthwestClearClear
June 2965°F18°C92°F33°C6 mph9 km/h from SouthwestClearClear
June 3065°F18°C91°F33°C5 mph9 km/h from SouthwestClearClear
July 164°F18°C89°F32°C5 mph9 km/h from SouthwestClearClear

No

Low of 61°F16°C, High of 91°F33°C
Wind: 5 mph9 km/h
Precipitation: None

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