Port Washington, WI Weather & Growing Conditions
This Afternoon
63°F
Scattered Showers And Thunderstorms
Scattered showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Cloudy, with a high near 63. East wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Scattered Showers And Thunderstorms | 10 mph E | 25% |
| Tonight | 60°F | Chance Showers And Thunderstorms | 5 to 15 mph NE | 59% |
| Sunday | 64°F | Isolated Rain Showers then Mostly Cloudy | 15 to 20 mph NE | 18% |
| Sunday Night | 54°F | Mostly Cloudy | 10 to 20 mph NE | 2% |
| Monday | 63°F | Mostly Cloudy | 10 to 15 mph NE | 3% |
| Monday Night | 50°F | Mostly Cloudy | 10 to 15 mph NE | 6% |
| Tuesday | 63°F | Mostly Cloudy | 10 to 15 mph NE | 7% |
| Tuesday Night | 50°F | Mostly Cloudy | 10 to 15 mph NE | 8% |
| Wednesday | 64°F | Partly Sunny | 10 to 15 mph NE | 13% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 5% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Thursday Night | 53°F | Mostly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 68°F | Partly Sunny | 0 to 5 mph NE | 6% |
| Friday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Port Washington, WI
Last spring frost
Apr 27
First fall frost
Oct 22
Growing season
176 days
Hardiness zone
5b
Explore more for Port Washington, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Port Washington, Wi (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.