Harman US

Summit, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Summit, a village in Waukesha County, Wisconsin.

This Afternoon
66°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 3pm, then a chance of showers and thunderstorms. Cloudy, with a high near 66. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast for Summit

WhenTempForecastWindPrecip
This Afternoon 66°F Slight Chance Showers And Thunderstorms 5 mph E 58%
Tonight 61°F Showers And Thunderstorms 5 to 10 mph NE 81%
Sunday 65°F Scattered Rain Showers then Mostly Cloudy 10 to 15 mph NE 52%
Sunday Night 54°F Mostly Cloudy 10 to 15 mph NE 5%
Monday 62°F Mostly Cloudy 10 to 15 mph NE 9%
Monday Night 48°F Mostly Cloudy then Slight Chance Rain Showers 5 to 10 mph NE 20%
Tuesday 61°F Slight Chance Rain Showers 5 to 15 mph NE 20%
Tuesday Night 48°F Mostly Cloudy 5 to 10 mph NE 7%
Wednesday 63°F Partly Sunny 5 to 10 mph NE 6%
Wednesday Night 49°F Mostly Cloudy 0 to 5 mph NE 3%
Thursday 66°F Partly Sunny 0 to 5 mph NE 3%
Thursday Night 51°F Mostly Cloudy 0 to 5 mph NE 7%
Friday 70°F Partly Sunny 0 to 5 mph NE 4%
Friday Night 50°F Partly Cloudy 0 to 5 mph NE 3%

Forecast source: National Weather Service (api.weather.gov) for Summit (43.046, -88.477). Updated through the day.

Growing snapshot for Summit

Last spring frost
Apr 30
First fall frost
Oct 12
Growing season
164 days
Hardiness zone
5b

More local growing data for Summit: nearby ZIP 53066 weather · frost dates · planting calendar · Wisconsin frost dates

Nearby towns & communities

All Wisconsin locations ›

Climate data from the nearest NOAA station, Oconomowoc Wwtp, Wi (1.2 mi from Summit). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.