Yes

you do need a jacket based on the weather in Blacktown NSW 2148, Australia 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
59°F15°C & Mostly Cloudy

Wind is 8 mph13 km/h from the Southwest, gusting to 19 mph30 km/h
June 12
11pm59°F15°C9 mph14 km/h SouthMostly Cloudy
June 13
12am60°F16°C9 mph14 km/h SouthMostly Cloudy
1am60°F15°C9 mph14 km/h SouthMostly Cloudy
2am59°F15°C7 mph12 km/h SouthMostly Cloudy
3am57°F14°C6 mph10 km/h SouthDrizzle
4am55°F13°C6 mph10 km/h SouthwestMostly Cloudy
5am53°F12°C6 mph10 km/h SouthwestPartly Cloudy
6am52°F11°C6 mph9 km/h SouthwestPartly Cloudy
7am51°F11°C6 mph9 km/h SouthwestPartly Cloudy
8am50°F10°C5 mph8 km/h SouthwestPartly Cloudy
9am49°F9°C5 mph9 km/h SouthwestPartly Cloudy
10am48°F9°C5 mph8 km/h SouthwestMostly Clear
DateLowHighWindDayNight
June 1248°F9°C60°F16°C6 mph10 km/h from SouthwestMostly CloudyMostly Clear
June 1346°F8°C63°F17°C4 mph6 km/h from SouthDrizzlePartly Cloudy
June 1441°F5°C63°F17°C3 mph6 km/h from NorthwestPartly CloudyClear
June 1540°F4°C63°F17°C2 mph4 km/h from NorthClearClear
June 1642°F5°C64°F18°C4 mph6 km/h from NorthwestPartly CloudyMostly Clear
June 1742°F5°C63°F17°C2 mph3 km/h from NorthwestClearPartly Cloudy
June 1843°F6°C63°F17°C2 mph3 km/h from NorthPartly CloudyMostly Clear

Yes

Low of 46°F8°C, High of 63°F17°C
Wind: 4 mph6 km/h
Precipitation: 32% rain

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