Summit Lake, WI Weather & Growing Conditions
Today
75°F
Chance Showers And Thunderstorms
Rain showers likely before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm. Mostly cloudy, with a high near 75. Heat index values as high as 75. West wind 6 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Chance Showers And Thunderstorms | 6 to 10 mph W | 67% |
| Tonight | 54°F | Mostly Cloudy | 5 mph NW | 12% |
| Wednesday | 74°F | Mostly Sunny | 3 mph NNW | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph S | 1% |
| Thursday | 79°F | Sunny | 1 to 7 mph SW | 1% |
| Thursday Night | 58°F | Mostly Clear | 6 mph SW | 1% |
| Friday | 82°F | Sunny | 5 to 10 mph SW | 8% |
| Friday Night | 61°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 32% |
| Saturday | 81°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 7 mph WSW | 22% |
| Saturday Night | 61°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 to 6 mph WSW | 46% |
| Sunday | 80°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 45% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 2 to 6 mph NNW | 31% |
| Monday | 78°F | Chance Showers And Thunderstorms | 5 mph NW | 30% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 5 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Summit Lake, WI
Last spring frost
Jun 3
First fall frost
Sep 18
Growing season
106 days
Hardiness zone
4b
Explore more for Summit Lake, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, North Pelican, Wi (16.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.