Forrest, IL Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph S | 7% |
| Tonight | 65°F | Partly Cloudy | 0 to 5 mph S | 1% |
| Wednesday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph SSW | 33% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph WSW | 87% |
| Thursday | 81°F | Showers And Thunderstorms | 0 to 5 mph SSW | 87% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph SSE | 39% |
| Friday | 83°F | Partly Sunny | 0 mph | 11% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 mph | 21% |
| Saturday | 86°F | Mostly Sunny | 0 to 5 mph SSW | 12% |
| Saturday Night | 69°F | Mostly Clear | 5 mph SSW | 12% |
| Sunday | 88°F | Sunny | 5 to 10 mph SSW | 11% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 22% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 22% |
| Monday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 31% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Forrest, IL
Last spring frost
Apr 25
First fall frost
Oct 20
Growing season
175 days
Hardiness zone
6a
Explore more for Forrest, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Piper City, Il (11.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.