Yes

you do need a jacket based on the weather in 2950 Hillside Dr, Delafield, WI 53018, USA 1 second ago

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

Wind is 4 mph6 km/h from the South, gusting to 6 mph10 km/h
April 8
9pm35°F2°C4 mph7 km/h SouthClear
10pm33°F0°C7 mph11 km/h SoutheastClear
11pm31°F-0°C8 mph13 km/h SouthMostly Clear
April 9
12am30°F-1°C8 mph13 km/h SouthMostly Clear
1am30°F-1°C8 mph14 km/h SouthPartly Cloudy
2am30°F-1°C8 mph13 km/h SouthMostly Cloudy
3am30°F-1°C8 mph13 km/h SouthPartly Cloudy
4am29°F-2°C7 mph12 km/h SouthMostly Cloudy
5am30°F-1°C7 mph12 km/h SouthMostly Cloudy
6am31°F-1°C8 mph13 km/h SouthCloudy
7am31°F-0°C8 mph13 km/h SouthCloudy
8am32°F-0°C8 mph13 km/h SouthCloudy
DateLowHighWindDayNight
April 819°F-7°C41°F5°C5 mph8 km/h from WestClearPartly Cloudy
April 929°F-2°C44°F7°C10 mph16 km/h from SoutheastRainRain
April 1033°F1°C44°F7°C8 mph13 km/h from NortheastCloudyPartly Cloudy
April 1130°F-1°C50°F10°C7 mph11 km/h from NorthMostly ClearPartly Cloudy
April 1234°F1°C56°F13°C6 mph9 km/h from SouthMostly CloudyMostly Cloudy
April 1339°F4°C61°F16°C13 mph21 km/h from SouthCloudyMostly Cloudy
April 1445°F7°C63°F17°C16 mph25 km/h from WestWindyWindy

Yes

Low of 29°F-2°C, High of 45°F7°C
Wind: 10 mph16 km/h
Precipitation: 55% rain

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