Gilson, IL Weather & Growing Conditions
This Afternoon
68°F
Light Rain Likely
Rain likely and a chance of thunderstorms. Mostly cloudy, with a high near 68. South southeast wind around 17 mph, with gusts as high as 29 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 |
|---|---|---|---|---|
| This Afternoon | 68°F | Light Rain Likely | 17 mph SSE | 68% |
| Tonight | 52°F | Light Rain | 10 to 17 mph S | 76% |
| Wednesday | 57°F | Slight Chance Light Rain then Mostly Cloudy | 16 mph SW | 20% |
| Wednesday Night | 45°F | Mostly Cloudy | 9 to 13 mph SW | 7% |
| Thursday | 57°F | Mostly Cloudy then Slight Chance Light Rain | 8 to 13 mph WSW | 21% |
| Thursday Night | 42°F | Chance Light Rain | 5 to 8 mph NW | 29% |
| Friday | 53°F | Slight Chance Light Rain | 7 to 10 mph N | 15% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph WNW | 3% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph WNW | 3% |
| Sunday | 59°F | Sunny | 2 to 8 mph WNW | 11% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 3% |
| Monday | 63°F | Sunny | 2 to 12 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 6 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Gilson, IL
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
5b
Explore more for Gilson, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Knoxville, Il (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.