Coal Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coal Valley, a village in Rock Island County, Illinois.
Overnight
52°F
Mostly Cloudy
Mostly cloudy. Low around 52, with temperatures rising to around 56 overnight. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Coal Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Cloudy | 15 mph SW | 7% |
| Wednesday | 55°F | Slight Chance Rain Showers | 15 mph SW | 23% |
| Wednesday Night | 46°F | Mostly Cloudy | 15 mph SW | 12% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph W | 44% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NW | 16% |
| Friday | 50°F | Partly Sunny | 5 to 10 mph N | 5% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 2% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 36°F | Clear | 5 mph SW | 1% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Coal Valley (41.438, -90.439). Updated through the day.
Growing snapshot for Coal Valley
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
176 days
Hardiness zone
5b
More local growing data for Coal Valley: nearby ZIP 61240 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 (5.3 mi from Coal Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.