Rock Island, IL Weather & Growing Conditions
Tonight
68°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 1am and 5am, then showers and thunderstorms likely. Mostly cloudy. Low around 68, with temperatures rising to around 70 overnight. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph E | 55% |
| Saturday | 83°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph S | 67% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph NW | 79% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 5 to 15 mph NE | 79% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 57% |
| Monday | 65°F | Rain Showers Likely | 15 mph NE | 57% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph NE | 52% |
| Tuesday | 63°F | Chance Showers And Thunderstorms | 10 mph NE | 45% |
| Tuesday Night | 51°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 67°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 70°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 56°F | Partly Cloudy | 0 to 5 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 6% |
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 Sep 19, 2026.