Yes

you do need a jacket based on the weather in Perth WA, Australia 8 minutes ago

Why? Because it's so windy, your hat is now someone else's problem, two cities away!
74°F23°C & Cloudy

Wind is 12 mph19 km/h from the North, gusting to 26 mph42 km/h
September 12
1am75°F24°C12 mph20 km/h NorthCloudy
2am76°F25°C12 mph20 km/h NorthwestMostly Cloudy
3am76°F24°C12 mph20 km/h NorthwestMostly Cloudy
4am75°F24°C11 mph18 km/h NorthwestPartly Cloudy
5am73°F23°C9 mph15 km/h NorthwestClear
6am70°F21°C7 mph11 km/h NorthwestClear
7am67°F19°C5 mph8 km/h NorthClear
8am64°F18°C4 mph7 km/h NorthMostly Clear
9am62°F17°C5 mph8 km/h NortheastPartly Cloudy
10am61°F16°C6 mph9 km/h NortheastPartly Cloudy
11am61°F16°C5 mph8 km/h NorthPartly Cloudy
12pm60°F15°C6 mph9 km/h NorthPartly Cloudy
DateLowHighWindDayNight
September 1152°F11°C76°F25°C11 mph17 km/h from NorthPartly CloudyRain
September 1257°F14°C71°F22°C12 mph20 km/h from NorthwestRainDrizzle
September 1351°F11°C63°F17°C21 mph34 km/h from WestRainDrizzle
September 1449°F9°C61°F16°C11 mph18 km/h from SouthwestMostly CloudyPartly Cloudy
September 1546°F8°C63°F17°C7 mph11 km/h from NorthwestPartly CloudyMostly Cloudy
September 1652°F11°C66°F19°C12 mph19 km/h from WestDrizzlePartly Cloudy
September 1748°F9°C63°F17°C10 mph15 km/h from SouthwestPartly CloudyMostly Clear

Yes

Low of 57°F14°C, High of 71°F22°C
Wind: 12 mph20 km/h
Precipitation: 69% rain

Support This Page