Sumner, IL Weather & Growing Conditions
Tonight
60°F
Rain
Rain before 4am, then a chance of rain showers. Mostly cloudy, with a low around 60. South wind 13 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Rain | 13 to 18 mph S | 95% |
| Wednesday | 67°F | Chance Rain Showers then Partly Sunny | 8 to 14 mph SW | 26% |
| Wednesday Night | 46°F | Mostly Cloudy | 6 mph WSW | 0% |
| Thursday | 66°F | Sunny | 6 to 12 mph SW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 5 mph WNW | 4% |
| Friday | 59°F | Partly Sunny | 3 to 10 mph NNW | 4% |
| Friday Night | 40°F | Partly Cloudy | 3 to 8 mph NNW | 4% |
| Saturday | 56°F | Mostly Sunny | 6 mph NNW | 1% |
| Saturday Night | 35°F | Partly Cloudy | 2 mph WNW | 2% |
| Sunday | 61°F | Sunny | 2 to 8 mph W | 6% |
| Sunday Night | 35°F | Mostly Clear | 2 to 6 mph WNW | 6% |
| Monday | 63°F | Sunny | 2 to 9 mph W | 3% |
| Monday Night | 39°F | Mostly Clear | 6 mph SW | 1% |
| Tuesday | 67°F | Sunny | 7 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sumner, IL
Last spring frost
Apr 12
First fall frost
Oct 25
Growing season
193 days
Hardiness zone
6b
Explore more for Sumner, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Lawrenceville 2Wsw, Il (7.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.