Yes

you do need a jacket based on the weather in Mount Annan NSW 2567, Australia 1 second ago

Why? Because it's so windy, your hat is now someone else's problem, two cities away!
85°F30°C & Clear

Wind is 12 mph19 km/h from the East, gusting to 27 mph43 km/h
December 26
2am85°F29°C12 mph19 km/h EastClear
3am82°F28°C10 mph16 km/h NortheastClear
4am78°F26°C8 mph13 km/h NortheastClear
5am75°F24°C6 mph10 km/h NortheastClear
6am73°F23°C5 mph8 km/h EastClear
7am72°F22°C4 mph6 km/h EastClear
8am70°F21°C4 mph6 km/h EastClear
9am70°F21°C3 mph5 km/h NortheastMostly Clear
10am69°F21°C3 mph5 km/h EastMostly Clear
11am68°F20°C3 mph5 km/h EastMostly Clear
12pm68°F20°C3 mph6 km/h EastMostly Clear
1pm67°F19°C4 mph6 km/h NortheastPartly Cloudy
DateLowHighWindDayNight
December 2558°F14°C92°F34°C8 mph14 km/h from NortheastClearMostly Clear
December 2666°F19°C98°F37°C8 mph13 km/h from NorthwestPartly CloudyMostly Clear
December 2761°F16°C83°F28°C5 mph9 km/h from EastPartly CloudyClear
December 2857°F14°C87°F31°C7 mph11 km/h from EastClearMostly Clear
December 2962°F17°C80°F27°C8 mph12 km/h from EastPartly CloudyDrizzle
December 3064°F18°C85°F29°C5 mph9 km/h from SoutheastDrizzleMostly Cloudy
December 3166°F19°C86°F30°C6 mph10 km/h from EastPartly CloudyDrizzle

No

Low of 66°F19°C, High of 99°F37°C
Wind: 8 mph13 km/h
Precipitation: 53% rain

Support This Page