Port Washington, WI Weather & Growing Conditions
Overnight
55°F
Light Rain
Rain. Cloudy, with a low around 55. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Light Rain | 10 mph S | 78% |
| Wednesday | 62°F | Chance Light Rain | 15 mph S | 49% |
| Wednesday Night | 46°F | Cloudy then Chance Light Rain | 15 mph SW | 47% |
| Thursday | 55°F | Light Rain Likely | 15 mph W | 66% |
| Thursday Night | 36°F | Chance Light Rain then Cloudy | 10 to 15 mph N | 45% |
| Friday | 48°F | Chance Light Rain | 15 to 20 mph N | 25% |
| Friday Night | 32°F | Partly Cloudy | 5 to 10 mph N | 2% |
| Saturday | 50°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 2% |
| Sunday | 54°F | Sunny | 10 to 15 mph W | 8% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 1% |
| Monday | 58°F | Sunny | 5 to 15 mph SW | 0% |
| Monday Night | 40°F | Partly Cloudy | 10 mph W | 0% |
| Tuesday | 58°F | Sunny | 5 to 10 mph NW | 4% |
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 Nov 4, 2026.