Cedarburg, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cedarburg, a city in Ozaukee County, Wisconsin.
This Afternoon
67°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 67. East wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Cedarburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Chance Rain Showers | 10 mph E | 33% |
| Tonight | 58°F | Showers And Thunderstorms | 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 | 66°F | Chance Rain Showers | 10 to 20 mph NE | 39% |
| Sunday Night | 53°F | Mostly Cloudy | 10 to 15 mph NE | 14% |
| Monday | 62°F | Mostly Cloudy | 15 mph NE | 14% |
| Monday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 15% |
| Tuesday | 61°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 15% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 13% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 13% |
| Wednesday Night | 50°F | Mostly Cloudy | 5 mph NE | 6% |
| Thursday | 66°F | Partly Sunny | 5 mph N | 3% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph N | 4% |
Forecast source: National Weather Service (api.weather.gov) for Cedarburg (43.300, -87.988). Updated through the day.
Growing snapshot for Cedarburg
Last spring frost
Apr 23
First fall frost
Oct 24
Growing season
182 days
Hardiness zone
5b
More local growing data for Cedarburg: nearby ZIP 53012 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Grafton Wwtp, Wi (4 mi from Cedarburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.