Yes

you do need a jacket based on the weather in Dianella WA 6059, Australia 1 second ago

Why? Because it's fairly windy outside!
61°F16°C & Mostly Cloudy

Wind is 11 mph18 km/h from the North, gusting to 24 mph38 km/h
July 23
3am61°F16°C12 mph19 km/h NorthRain
4am60°F15°C12 mph19 km/h NorthDrizzle
5am58°F14°C11 mph18 km/h NorthwestRain
6am57°F14°C9 mph15 km/h NorthwestRain
7am56°F13°C12 mph19 km/h NorthwestRain
8am56°F13°C9 mph15 km/h NorthwestRain
9am55°F13°C9 mph14 km/h WestRain
10am53°F12°C9 mph15 km/h SouthwestRain
11am50°F10°C15 mph24 km/h SouthRain
12pm49°F10°C11 mph18 km/h SouthRain
1pm48°F9°C8 mph13 km/h SouthRain
2pm48°F9°C5 mph9 km/h SouthRain
DateLowHighWindDayNight
July 2249°F10°C62°F16°C9 mph15 km/h from NorthRainRain
July 2343°F6°C55°F13°C11 mph18 km/h from SouthDrizzleClear
July 2438°F3°C57°F14°C4 mph6 km/h from SouthPartly CloudyPartly Cloudy
July 2541°F5°C59°F15°C7 mph11 km/h from NorthPartly CloudyDrizzle
July 2646°F8°C54°F12°C11 mph18 km/h from WestRainDrizzle
July 2743°F6°C56°F14°C11 mph17 km/h from SouthwestDrizzleClear
July 2842°F6°C61°F16°C4 mph7 km/h from SouthMostly ClearMostly Clear

Yes

Low of 43°F6°C, High of 55°F13°C
Wind: 11 mph18 km/h
Precipitation: 53% rain

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