Lake Summerset, IL Weather & Growing Conditions
Tonight
54°F
Rain Showers
Rain showers. Mostly cloudy. Low around 54, with temperatures rising to around 57 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain Showers | 15 mph S | 91% |
| Wednesday | 58°F | Rain Showers Likely | 15 mph SSW | 65% |
| Wednesday Night | 44°F | Chance Rain Showers | 15 mph SW | 31% |
| Thursday | 53°F | Rain Showers Likely | 10 to 15 mph WSW | 62% |
| Thursday Night | 39°F | Chance Rain Showers | 10 to 15 mph NNW | 29% |
| Friday | 49°F | Partly Sunny | 10 to 15 mph N | 14% |
| Friday Night | 32°F | Partly Cloudy | 0 to 10 mph NNW | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph WNW | 2% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph WSW | 4% |
| Sunday | 58°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 10 mph W | 15% |
| Sunday Night | 34°F | Mostly Clear | 5 to 10 mph W | 4% |
| Monday | 59°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 60°F | Sunny | 5 to 10 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Summerset, IL
Last spring frost
Apr 29
First fall frost
Oct 12
Growing season
165 days
Hardiness zone
5a
Explore more for Lake Summerset, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Brodhead Wwtp, Wi (12.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.