Grafton, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grafton, a village in Ozaukee County, Wisconsin.
This Afternoon
68°F
Rain Showers Likely
Rain showers likely. Mostly cloudy, with a high near 68. East wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Grafton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Rain Showers Likely | 10 mph E | 69% |
| Tonight | 58°F | Rain Showers | 10 to 15 mph E | 97% |
| Saturday | 69°F | Showers And Thunderstorms | 10 to 15 mph SE | 95% |
| Saturday Night | 58°F | Showers And Thunderstorms Likely | 10 mph NE | 71% |
| Sunday | 67°F | Chance Rain Showers | 10 to 25 mph NE | 38% |
| Sunday Night | 53°F | Mostly Cloudy | 10 to 20 mph NE | 13% |
| Monday | 63°F | Mostly Cloudy | 10 to 15 mph NE | 14% |
| Monday Night | 50°F | Mostly Cloudy | 10 to 15 mph NE | 14% |
| Tuesday | 62°F | Partly Sunny | 10 to 15 mph NE | 14% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 15 mph NE | 13% |
| Wednesday | 64°F | Partly Sunny | 5 to 10 mph NE | 13% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 mph N | 6% |
| Thursday | 67°F | Partly Sunny | 5 mph N | 3% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph N | 4% |
Forecast source: National Weather Service (api.weather.gov) for Grafton (43.321, -87.948). Updated through the day.
Growing snapshot for Grafton
Last spring frost
Apr 23
First fall frost
Oct 24
Growing season
182 days
Hardiness zone
6a
More local growing data for Grafton: nearby ZIP 53024 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Grafton Wwtp, Wi (2 mi from Grafton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.