Kewanee, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kewanee, a city in Henry County, Illinois.
This Afternoon
67°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 67. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
7-day forecast for Kewanee
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms | 15 mph S | 86% |
| Tonight | 53°F | Showers And Thunderstorms | 15 mph S | 84% |
| Wednesday | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph SW | 23% |
| Wednesday Night | 46°F | Mostly Cloudy | 10 to 15 mph SW | 13% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 34% |
| Thursday Night | 44°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 32% |
| Friday | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 15% |
| Friday Night | 36°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph NW | 3% |
| Saturday Night | 36°F | Partly Cloudy | 0 to 5 mph W | 5% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 12% |
| Sunday Night | 37°F | Mostly Clear | 5 mph W | 2% |
| Monday | 63°F | Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 42°F | Mostly Clear | 5 to 10 mph W | 0% |
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 Nov 4, 2026.