Bethany, IL Weather & Growing Conditions
Overnight
57°F
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 57. South southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Chance Light Rain | 14 mph SSW | 32% |
| Wednesday | 62°F | Slight Chance Light Rain then Patchy Drizzle | 14 mph SW | 15% |
| Wednesday Night | 45°F | Patchy Drizzle then Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 61°F | Partly Sunny | 10 to 14 mph WSW | 6% |
| Thursday Night | 41°F | Mostly Cloudy | 3 to 7 mph NW | 1% |
| Friday | 54°F | Partly Sunny | 8 to 12 mph NNW | 6% |
| Friday Night | 32°F | Partly Cloudy | 3 to 8 mph NNW | 0% |
| Saturday | 53°F | Sunny | 6 mph NNW | 0% |
| Saturday Night | 30°F | Partly Cloudy | 3 mph NW | 0% |
| Sunday | 59°F | Sunny | 2 to 8 mph WNW | 1% |
| Sunday Night | 32°F | Clear | 3 mph W | 1% |
| Monday | 64°F | Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 37°F | Clear | 5 mph SW | 0% |
| Tuesday | 66°F | Sunny | 6 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Bethany, IL
Last spring frost
Apr 15
First fall frost
Oct 22
Growing season
187 days
Hardiness zone
6a
Explore more for Bethany, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Sullivan 3S, Il (9.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.