Kewanee, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kewanee, a city in Henry County, Illinois.
This Afternoon
76°F
Mostly Sunny
Mostly sunny, with a high near 76. East wind around 10 mph.
7-day forecast for Kewanee
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Mostly Sunny | 10 mph E | 9% |
| Tonight | 67°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 to 15 mph SE | 44% |
| Saturday | 83°F | Chance Showers And Thunderstorms | 10 mph S | 53% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph N | 77% |
| Sunday | 73°F | Showers And Thunderstorms | 5 to 15 mph NE | 77% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 15 mph NE | 64% |
| Monday | 65°F | Showers And Thunderstorms Likely | 15 mph NE | 63% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 45% |
| Tuesday | 63°F | Chance Rain Showers | 15 mph NE | 44% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 15 mph NE | 4% |
| Wednesday | 67°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NE | 3% |
| Thursday | 69°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Kewanee (41.239, -89.926). Updated through the day.
Growing snapshot for Kewanee
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
5b
More local growing data for Kewanee: nearby ZIP 61443 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Kewanee 1 E, Il (2.8 mi from Kewanee). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.