Kewanee, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kewanee, a city in Henry County, Illinois.
Overnight
63°F
Mostly Clear
Mostly clear, with a low around 63. South wind around 5 mph.
7-day forecast for Kewanee
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 86°F | Mostly Sunny | 5 to 10 mph S | 3% |
| Tuesday Night | 68°F | Chance Showers And Thunderstorms | 5 mph S | 42% |
| Wednesday | 79°F | Showers And Thunderstorms Likely | 5 mph SW | 65% |
| Wednesday Night | 64°F | Showers And Thunderstorms | 5 mph N | 85% |
| Thursday | 78°F | Slight Chance Showers And Thunderstorms | 5 mph NE | 60% |
| Thursday Night | 63°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph E | 18% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SE | 14% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 14% |
| Saturday | 84°F | Sunny | 5 mph SW | 9% |
| Saturday Night | 71°F | Mostly Clear | 5 to 15 mph S | 9% |
| Sunday | 85°F | Sunny | 10 to 15 mph SW | 9% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 mph S | 32% |
| Monday | 85°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 mph S | 32% |
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 Aug 4, 2026.