Rock Island, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rock Island, a city in Rock Island County, Illinois.
Overnight
53°F
Mostly Cloudy
Mostly cloudy. Low around 53, with temperatures rising to around 56 overnight. Southwest wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Rock Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Cloudy | 10 mph SW | 7% |
| Wednesday | 55°F | Slight Chance Rain Showers | 10 to 15 mph SW | 24% |
| Wednesday Night | 47°F | Mostly Cloudy | 10 mph SW | 14% |
| Thursday | 56°F | Chance Rain Showers | 5 to 10 mph W | 51% |
| Thursday Night | 43°F | Mostly Cloudy | 5 mph NW | 14% |
| Friday | 50°F | Partly Sunny | 5 to 10 mph N | 5% |
| Friday Night | 33°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 36°F | Mostly Clear | 0 mph | 2% |
| Sunday | 58°F | Sunny | 0 to 5 mph W | 1% |
| Sunday Night | 37°F | Clear | 0 to 5 mph W | 1% |
| Monday | 63°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 64°F | Sunny | 0 to 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Rock Island (41.470, -90.583). Updated through the day.
Growing snapshot for Rock Island
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
176 days
Hardiness zone
5b
More local growing data for Rock Island: nearby ZIP 61201 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Moline Quad City Intl Ap, Il (2.8 mi from Rock Island). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.