Yes

you do need a jacket based on the weather in Burnie TAS 7320, Australia 1 second ago

Why? Because it's pretty chilly!
51°F10°C & Cloudy

Wind is 7 mph11 km/h from the Southeast, gusting to 12 mph19 km/h
July 26
7am51°F10°C7 mph12 km/h SoutheastDrizzle
8am50°F10°C8 mph13 km/h SoutheastDrizzle
9am50°F10°C8 mph13 km/h SoutheastCloudy
10am50°F10°C8 mph13 km/h SoutheastDrizzle
11am50°F10°C8 mph13 km/h SoutheastDrizzle
12pm50°F10°C8 mph13 km/h SoutheastDrizzle
1pm50°F10°C8 mph14 km/h EastDrizzle
2pm49°F10°C8 mph14 km/h SoutheastDrizzle
3pm49°F9°C9 mph14 km/h SoutheastDrizzle
4pm49°F9°C9 mph15 km/h SoutheastDrizzle
5pm49°F10°C9 mph15 km/h SoutheastDrizzle
6pm49°F10°C9 mph15 km/h SoutheastDrizzle
DateLowHighWindDayNight
July 2550°F10°C54°F12°C8 mph13 km/h from NortheastRainDrizzle
July 2647°F9°C53°F11°C7 mph11 km/h from SoutheastDrizzleDrizzle
July 2745°F7°C55°F13°C11 mph18 km/h from SouthwestDrizzlePartly Cloudy
July 2844°F7°C54°F12°C9 mph14 km/h from SouthwestPartly CloudyMostly Clear
July 2940°F5°C52°F11°C5 mph9 km/h from SoutheastMostly ClearMostly Clear
July 3039°F4°C53°F11°C4 mph6 km/h from SouthwestMostly ClearMostly Clear
July 3141°F5°C53°F12°C4 mph7 km/h from WestPartly CloudyMostly Clear

Yes

Low of 47°F9°C, High of 53°F12°C
Wind: 7 mph11 km/h
Precipitation: 89% rain

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