Grafton, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grafton, a village in Ozaukee County, Wisconsin.
Overnight
62°F
Mostly Clear
Mostly clear, with a low around 62. Southwest wind around 5 mph.
7-day forecast for Grafton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Clear | 5 mph SW | 0% |
| Tuesday | 82°F | Mostly Sunny | 5 to 10 mph S | 8% |
| Tuesday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph SW | 86% |
| Wednesday | 74°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 5 mph N | 59% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms | 0 mph | 37% |
| Thursday | 78°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 16% |
| Thursday Night | 60°F | Mostly Clear | 0 mph | 5% |
| Friday | 82°F | Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 64°F | Mostly Clear | 5 mph S | 6% |
| Saturday | 83°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 29% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 29% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 5 mph SW | 52% |
| Monday | 82°F | Chance Rain Showers | 5 mph S | 39% |
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 Aug 4, 2026.