Spring Valley, IL Weather & Growing Conditions
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. Southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph S | 36% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 5 mph W | 55% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 0 to 5 mph N | 86% |
| Thursday | 79°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 61% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 30% |
| Friday | 82°F | Mostly Sunny | 0 mph | 10% |
| Friday Night | 65°F | Mostly Clear | 0 mph | 10% |
| Saturday | 84°F | Mostly Sunny | 0 to 5 mph SW | 9% |
| Saturday Night | 70°F | Mostly Clear | 5 to 10 mph S | 11% |
| Sunday | 86°F | Sunny | 10 to 15 mph SW | 11% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 30% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 30% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph SW | 37% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Spring Valley, IL
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
176 days
Hardiness zone
5b
Explore more for Spring Valley, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Peru, Il (6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.