Yes

you do need a jacket based on the weather in Crawley WA 6009, Australia 1 second ago

Why? Because it's pretty chilly!
58°F14°C & Mostly Clear

Wind is 5 mph8 km/h from the North, gusting to 12 mph19 km/h
September 4
10am57°F14°C6 mph10 km/h NorthPartly Cloudy
11am56°F14°C7 mph11 km/h NorthMostly Clear
12pm56°F13°C7 mph12 km/h NorthPartly Cloudy
1pm56°F13°C8 mph13 km/h NorthMostly Clear
2pm55°F13°C9 mph15 km/h NorthMostly Clear
3pm55°F13°C10 mph16 km/h NorthMostly Clear
4pm54°F12°C10 mph16 km/h NorthMostly Cloudy
5pm55°F13°C11 mph18 km/h NorthPartly Cloudy
6pm55°F13°C11 mph18 km/h NorthPartly Cloudy
7pm56°F13°C11 mph18 km/h NorthMostly Cloudy
8pm57°F14°C13 mph21 km/h NorthDrizzle
9pm60°F15°C15 mph24 km/h NorthDrizzle
DateLowHighWindDayNight
September 351°F11°C65°F18°C5 mph9 km/h from WestClearDrizzle
September 453°F12°C61°F16°C14 mph22 km/h from NorthwestRainRain
September 552°F11°C60°F16°C17 mph27 km/h from SouthwestDrizzleDrizzle
September 650°F10°C62°F17°C10 mph16 km/h from WestDrizzleDrizzle
September 744°F7°C60°F16°C8 mph14 km/h from SouthPartly CloudyMostly Clear
September 844°F7°C63°F17°C6 mph9 km/h from SouthMostly ClearClear
September 946°F8°C67°F19°C5 mph8 km/h from EastClearClear

Yes

Low of 54°F12°C, High of 61°F16°C
Wind: 14 mph22 km/h
Precipitation: 92% rain

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