Yes

you do need a jacket based on the weather in Kalamunda WA 6076, Australia 1 second ago

Why? Because rain: where every drop seems to aim directly at your glasses and the wind could blow a wig clean off your head!
62°F16°C & Rain

Wind is 10 mph16 km/h from the North, gusting to 22 mph36 km/h
August 8
10pm62°F17°C11 mph17 km/h NorthRain
11pm63°F17°C10 mph17 km/h NorthRain
August 9
12am63°F17°C11 mph18 km/h NorthwestRain
1am65°F18°C11 mph18 km/h NorthwestRain
2am65°F18°C12 mph19 km/h NorthwestRain
3am65°F18°C11 mph18 km/h NorthwestDrizzle
4am64°F18°C10 mph15 km/h NorthwestDrizzle
5am63°F17°C9 mph15 km/h NorthwestDrizzle
6am61°F16°C8 mph12 km/h NorthwestMostly Cloudy
7am60°F16°C7 mph11 km/h NorthwestMostly Cloudy
8am59°F15°C7 mph11 km/h NorthwestPartly Cloudy
9am58°F15°C7 mph11 km/h NorthwestMostly Clear
DateLowHighWindDayNight
August 856°F13°C65°F18°C10 mph15 km/h from NorthwestRainRain
August 948°F9°C61°F16°C5 mph9 km/h from SouthwestDrizzleMostly Clear
August 1047°F8°C63°F17°C5 mph8 km/h from NorthwestPartly CloudyMostly Clear
August 1147°F8°C70°F21°C6 mph10 km/h from NortheastClearClear
August 1255°F13°C71°F22°C12 mph20 km/h from NorthwestMostly ClearThunderstorms
August 1346°F8°C58°F15°C11 mph17 km/h from SouthwestRainMostly Clear
August 1443°F6°C58°F15°C5 mph8 km/h from EastMostly ClearClear

Yes

Low of 48°F9°C, High of 62°F17°C
Wind: 5 mph9 km/h
Precipitation: 56% rain

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