Yes

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

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
55°F13°C & Clear

Wind is 1 mph2 km/h from the East, gusting to 1 mph2 km/h
October 20
1pm55°F13°C1 mph2 km/h EastClear
2pm54°F12°C3 mph4 km/h SoutheastClear
3pm56°F14°C2 mph3 km/h EastClear
4pm63°F17°C2 mph3 km/h EastClear
5pm70°F21°C2 mph2 km/h EastClear
6pm75°F24°C1 mph2 km/h NorthwestClear
7pm79°F26°C2 mph4 km/h WestClear
8pm82°F28°C4 mph7 km/h WestClear
9pm84°F29°C5 mph8 km/h WestClear
10pm85°F30°C6 mph10 km/h WestClear
11pm85°F29°C7 mph12 km/h WestClear
October 21
12am83°F28°C7 mph11 km/h WestClear
DateLowHighWindDayNight
October 2054°F12°C85°F30°C4 mph6 km/h from WestClearClear
October 2156°F14°C84°F29°C5 mph8 km/h from WestMostly ClearPartly Cloudy
October 2256°F14°C73°F23°C6 mph9 km/h from SouthwestMostly ClearMostly Clear
October 2354°F12°C78°F26°C4 mph7 km/h from WestClearClear
October 2456°F13°C85°F29°C4 mph6 km/h from WestClearMostly Clear
October 2556°F13°C79°F26°C5 mph7 km/h from WestPartly CloudyMostly Cloudy
October 2655°F13°C75°F24°C4 mph6 km/h from WestPartly CloudyMostly Clear

Yes

Low of 56°F14°C, High of 84°F29°C
Wind: 5 mph8 km/h
Precipitation: None

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