Yes

you do need a jacket based on the weather in Tucson, AZ, USA 1 second ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
35°F2°C & Mostly Clear

Wind is 5 mph8 km/h from the Southeast, gusting to 6 mph9 km/h
January 23
5am34°F1°C5 mph8 km/h SoutheastMostly Clear
6am34°F1°C4 mph6 km/h SoutheastClear
7am33°F1°C5 mph8 km/h EastClear
8am33°F1°C4 mph6 km/h SoutheastClear
9am32°F-0°C5 mph8 km/h SoutheastClear
10am32°F-0°C4 mph7 km/h SoutheastClear
11am39°F4°C4 mph6 km/h SouthClear
12pm47°F8°C5 mph7 km/h SoutheastClear
1pm53°F12°C5 mph8 km/h SoutheastClear
2pm57°F14°C4 mph7 km/h SoutheastClear
3pm60°F16°C4 mph6 km/h EastClear
4pm62°F17°C6 mph10 km/h EastClear
DateLowHighWindDayNight
January 2331°F-0°C63°F17°C6 mph10 km/h from EastClearClear
January 2437°F3°C69°F20°C8 mph13 km/h from SoutheastPartly CloudyMostly Cloudy
January 2547°F8°C69°F21°C8 mph13 km/h from SouthMostly CloudyMostly Clear
January 2645°F7°C69°F21°C10 mph16 km/h from SouthClearClear
January 2740°F5°C66°F19°C7 mph12 km/h from SouthwestClearPartly Cloudy
January 2841°F5°C53°F12°C6 mph9 km/h from WestPartly CloudyPartly Cloudy
January 2938°F3°C56°F13°C4 mph7 km/h from NorthwestClearClear

Yes

Low of 37°F3°C, High of 69°F21°C
Wind: 8 mph13 km/h
Precipitation: None

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