Spring Valley, IL Weather & Growing Conditions
This Afternoon
81°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South wind around 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Slight Chance Showers And Thunderstorms | 10 mph S | 24% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph W | 87% |
| Sunday | 72°F | Patchy Fog | 10 to 15 mph NE | 86% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 15 mph NE | 46% |
| Monday | 65°F | Rain Showers Likely | 15 mph NE | 62% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 20% |
| Tuesday Night | 51°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 15 mph NE | 17% |
| Wednesday | 67°F | Mostly Sunny | 10 mph NE | 4% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 69°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 73°F | Mostly Sunny | 5 mph NE | 3% |
| Friday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 2% |
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 Sep 19, 2026.