Yes

you do need a jacket based on the weather in Idyllwild-Pine Cove, CA, USA 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
56°F14°C & Clear

Wind is 3 mph5 km/h from the Northwest, gusting to 4 mph6 km/h
November 8
5am57°F14°C4 mph6 km/h NorthwestClear
6am56°F14°C2 mph4 km/h NorthwestClear
7am55°F13°C2 mph4 km/h NortheastClear
8am55°F13°C3 mph4 km/h EastClear
9am54°F12°C3 mph4 km/h EastClear
10am54°F12°C3 mph5 km/h NortheastClear
11am54°F12°C4 mph7 km/h EastClear
12pm57°F14°C3 mph5 km/h EastClear
1pm57°F14°C3 mph6 km/h EastClear
2pm57°F14°C4 mph6 km/h EastClear
3pm58°F15°C4 mph6 km/h EastClear
4pm62°F17°C4 mph6 km/h EastClear
DateLowHighWindDayNight
November 755°F13°C69°F21°C3 mph5 km/h from WestClearClear
November 854°F12°C71°F22°C4 mph6 km/h from NortheastClearClear
November 959°F15°C72°F22°C7 mph11 km/h from NortheastClearClear
November 1059°F15°C73°F23°C4 mph6 km/h from EastClearPartly Cloudy
November 1158°F14°C70°F21°C4 mph7 km/h from WestPartly CloudyPartly Cloudy
November 1253°F12°C64°F18°C3 mph5 km/h from SouthwestPartly CloudyMostly Clear
November 1352°F11°C62°F17°C4 mph6 km/h from WestMostly ClearMostly Cloudy

Yes

Low of 54°F12°C, High of 72°F22°C
Wind: 4 mph6 km/h
Precipitation: None

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