Yes
you do need a jacket based on the weather in Waukesha, WI, USA 1 second ago
Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
40°F4°C & Mostly Cloudy
Wind is 1 mph2 km/h from the Northeast, gusting to 4 mph6 km/h
| May 9 | ||||
| 9am | 44°F7°C | 1 mph2 km/h East | Clear | |
| 10am | 49°F10°C | 1 mph2 km/h Southeast | Clear | |
| 11am | 54°F12°C | 2 mph3 km/h North | Mostly Clear | |
| 12pm | 59°F15°C | 3 mph5 km/h North | Mostly Clear | |
| 1pm | 63°F17°C | 2 mph3 km/h North | Clear | |
| 2pm | 65°F19°C | 2 mph4 km/h Northwest | Clear | |
| 3pm | 67°F19°C | 2 mph3 km/h Northwest | Clear | |
| 4pm | 68°F20°C | 2 mph4 km/h West | Clear | |
| 5pm | 69°F21°C | 3 mph5 km/h West | Clear | |
| 6pm | 69°F21°C | 3 mph5 km/h West | Clear | |
| 7pm | 69°F20°C | 4 mph7 km/h West | Clear | |
| 8pm | 67°F19°C | 5 mph7 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 9 | 34°F1°C | 69°F21°C | 3 mph4 km/h from Northwest | Clear | Clear |
| May 10 | 44°F7°C | 67°F19°C | 12 mph19 km/h from Northeast | Clear | Clear |
| May 11 | 41°F5°C | 72°F22°C | 9 mph14 km/h from Southeast | Clear | Mostly Clear |
| May 12 | 50°F10°C | 75°F24°C | 8 mph13 km/h from Southeast | Partly Cloudy | Mostly Cloudy |
| May 13 | 55°F13°C | 72°F22°C | 8 mph13 km/h from Southeast | Drizzle | Mostly Cloudy |
| May 14 | 56°F13°C | 75°F24°C | 7 mph12 km/h from Southeast | Partly Cloudy | Partly Cloudy |
| May 15 | 54°F12°C | 80°F27°C | 11 mph18 km/h from South | Partly Cloudy | Partly Cloudy |
Yes
Low of 45°F7°C, High of 67°F20°CWind: 12 mph19 km/h
Precipitation: None