Spring Valley, IL Weather & Growing Conditions
Tonight
54°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 54, with temperatures rising to around 56 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Showers And Thunderstorms | 15 mph S | 91% |
| Wednesday | 58°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 30% |
| Wednesday Night | 46°F | Mostly Cloudy | 10 to 15 mph SW | 13% |
| Thursday | 56°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph SW | 34% |
| Thursday Night | 43°F | Chance Rain Showers | 5 mph NW | 35% |
| Friday | 52°F | Slight Chance Rain Showers then Partly Sunny | 5 to 10 mph N | 18% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph NW | 2% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 35°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 57°F | Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 36°F | Mostly Clear | 0 to 5 mph W | 4% |
| Monday | 62°F | Sunny | 5 to 10 mph SW | 2% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 1% |
| Tuesday | 63°F | Sunny | 5 mph NW | 0% |
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 Nov 4, 2026.