South Beloit, IL Weather & Growing Conditions
Overnight
57°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 57, with temperatures rising to around 61 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Rain Showers Likely | 15 mph S | 68% |
| Wednesday | 61°F | Slight Chance Rain Showers | 15 mph SSW | 21% |
| Wednesday Night | 45°F | Slight Chance Rain Showers | 15 mph SW | 22% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 44% |
| Thursday Night | 38°F | Chance Rain Showers then Mostly Cloudy | 10 mph NNW | 27% |
| Friday | 48°F | Partly Sunny | 10 to 15 mph N | 5% |
| Friday Night | 30°F | Partly Cloudy | 0 to 10 mph NNW | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Monday | 60°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 61°F | Sunny | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Beloit, IL
Last spring frost
May 1
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
5b
Explore more for South Beloit, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Beloit, Wi (2.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.