Stonington, IL Weather & Growing Conditions
Tonight
54°F
Rain
Rain before 3am, then a slight chance of rain showers between 3am and 5am. Mostly cloudy, with a low around 54. South wind 13 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain | 13 to 16 mph S | 95% |
| Wednesday | 61°F | Mostly Cloudy | 12 to 15 mph SW | 13% |
| Wednesday Night | 44°F | Mostly Cloudy | 9 mph SW | 0% |
| Thursday | 63°F | Mostly Sunny | 8 to 14 mph WSW | 3% |
| Thursday Night | 42°F | Mostly Cloudy then Slight Chance Light Rain | 3 to 7 mph NW | 22% |
| Friday | 56°F | Mostly Cloudy | 6 to 12 mph NNW | 12% |
| Friday Night | 36°F | Partly Cloudy | 2 to 9 mph NNW | 6% |
| Saturday | 55°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph W | 2% |
| Sunday | 61°F | Sunny | 2 to 9 mph W | 7% |
| Sunday Night | 34°F | Mostly Clear | 2 to 6 mph WNW | 5% |
| Monday | 64°F | Sunny | 3 to 10 mph WSW | 3% |
| Monday Night | 39°F | Mostly Clear | 3 to 7 mph SW | 2% |
| Tuesday | 67°F | Sunny | 3 to 7 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Stonington, IL
Last spring frost
Apr 14
First fall frost
Oct 24
Growing season
192 days
Hardiness zone
6a
Explore more for Stonington, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Decatur Wtp, Il (17.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.