Spring Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Spring Grove, a village in Mchenry County, Illinois.
Overnight
62°F
Mostly Clear
Mostly clear, with a low around 62. South southwest wind around 5 mph.
7-day forecast for Spring Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Clear | 5 mph SSW | 0% |
| Tuesday | 84°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Tuesday Night | 66°F | Chance Showers And Thunderstorms | 0 to 10 mph SW | 59% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 0 to 5 mph WSW | 74% |
| Wednesday Night | 61°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 73% |
| Thursday | 78°F | Chance Rain Showers | 0 to 5 mph NNE | 46% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 5 mph NE | 14% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph SSW | 7% |
| Saturday | 84°F | Mostly Sunny | 0 to 10 mph SW | 11% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 22% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 46% |
| Monday | 84°F | Chance Rain Showers | 5 mph SSW | 45% |
Forecast source: National Weather Service (api.weather.gov) for Spring Grove (42.451, -88.240). Updated through the day.
Growing snapshot for Spring Grove
Last spring frost
Apr 23
First fall frost
Oct 21
Growing season
179 days
Hardiness zone
5b
More local growing data for Spring Grove: nearby ZIP 60081 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Antioch, Il (6.9 mi from Spring Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.