Rock City, IL Weather & Growing Conditions
Today
59°F
Chance Rain Showers then Cloudy
A chance of rain showers before noon. Cloudy. High near 59, with temperatures falling to around 55 in the afternoon. Southwest wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Chance Rain Showers then Cloudy | 15 to 20 mph SW | 30% |
| Tonight | 45°F | Slight Chance Rain Showers | 15 mph SW | 24% |
| Thursday | 54°F | Chance Rain Showers | 10 to 15 mph W | 52% |
| Thursday Night | 38°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph N | 19% |
| Friday | 48°F | Partly Sunny | 10 to 15 mph N | 3% |
| Friday Night | 29°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 6% |
| Sunday Night | 33°F | Mostly Clear | 5 to 10 mph W | 0% |
| Monday | 60°F | Sunny | 5 to 15 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 61°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 37°F | Partly Cloudy | 0 to 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rock City, IL
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5a
Explore more for Rock City, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (10.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.