Rock Island, 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 | 9% |
| Tonight | 69°F | Chance Showers And Thunderstorms | 5 mph NE | 76% |
| Wednesday | 79°F | Showers And Thunderstorms | 5 mph NE | 79% |
| Wednesday Night | 64°F | Showers And Thunderstorms | 0 to 5 mph N | 75% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 49% |
| Thursday Night | 63°F | Mostly Clear | 0 mph | 9% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph S | 6% |
| Friday Night | 67°F | Mostly Clear | 0 to 5 mph S | 10% |
| Saturday | 85°F | Sunny | 5 mph S | 9% |
| Saturday Night | 72°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 16% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SW | 16% |
| Sunday Night | 71°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 33% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 33% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph W | 34% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rock Island, IL
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
176 days
Hardiness zone
5b
Explore more for Rock Island, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Moline Quad City Intl Ap, Il (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.