Wenona, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Wenona, a city in Lasalle County, Illinois.
This Afternoon
77°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 5pm. Partly sunny. High near 77, with temperatures falling to around 70 in the afternoon. East wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Wenona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Chance Showers And Thunderstorms | 9 mph E | 44% |
| Tonight | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 9 mph ESE | 25% |
| Saturday | 83°F | Chance Showers And Thunderstorms | 8 mph SSE | 45% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 mph WSW | 72% |
| Sunday | 75°F | Rain Showers | 5 to 14 mph NNE | 77% |
| Sunday Night | 57°F | Showers And Thunderstorms | 12 to 15 mph NE | 75% |
| Monday | 66°F | Showers And Thunderstorms Likely | 13 to 16 mph ENE | 66% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 16 mph NE | 41% |
| Tuesday | 65°F | Chance Rain Showers | 13 mph NE | 26% |
| Tuesday Night | 51°F | Mostly Cloudy | 6 to 13 mph NNE | 7% |
| Wednesday | 68°F | Partly Sunny | 6 to 9 mph NNE | 5% |
| Wednesday Night | 52°F | Partly Cloudy | 3 to 8 mph NNE | 5% |
| Thursday | 70°F | Mostly Sunny | 3 to 7 mph N | 2% |
| Thursday Night | 54°F | Partly Cloudy | 2 to 6 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Wenona (41.049, -89.052). Updated through the day.
Growing snapshot for Wenona
Last spring frost
Apr 26
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
5b
More local growing data for Wenona: nearby ZIP 61377 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cedar Point
Dana
Dayton
Earlville
Grand Ridge
Harding
Kangley
LaSalle
Leland
Leonore
Lostant
Marseilles
Mendota
Millington
Naplate
Newark
North Utica
Oglesby
Ottawa
Peru
Ransom
Rutland
Seneca
Serena
Sheridan
Streator
Tonica
Triumph
Troy Grove
Wedron
Climate data from the nearest NOAA station, Minonk, Il (10.6 mi from Wenona). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.