Summit Lake, WI Weather & Growing Conditions
Today
61°F
Rain Showers
Rain showers. Cloudy. High near 61, with temperatures falling to around 55 in the afternoon. South southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 61°F | Rain Showers | 10 mph SSW | 97% |
| Tonight | 42°F | Rain Showers | 7 mph WSW | 75% |
| Thursday | 46°F | Rain Showers Likely | 6 to 16 mph NNW | 76% |
| Thursday Night | 29°F | Mostly Cloudy | 8 to 15 mph N | 6% |
| Friday | 43°F | Partly Sunny | 3 to 10 mph N | 0% |
| Friday Night | 24°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 45°F | Sunny | 0 to 5 mph WNW | 0% |
| Saturday Night | 28°F | Partly Cloudy | 6 mph W | 6% |
| Sunday | 49°F | Mostly Sunny | 6 to 10 mph WNW | 11% |
| Sunday Night | 30°F | Partly Cloudy | 2 to 6 mph W | 1% |
| Monday | 53°F | Mostly Sunny | 2 to 10 mph SW | 0% |
| Monday Night | 34°F | Partly Cloudy | 7 mph W | 2% |
| Tuesday | 52°F | Mostly Sunny | 5 to 9 mph NW | 7% |
| Tuesday Night | 31°F | Partly Cloudy | 0 to 3 mph NW | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Summit Lake, WI
Last spring frost
May 22
First fall frost
Sep 24
Growing season
125 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, Rhinelander, Wi (16.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.