Troy Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Troy Grove, a village in Lasalle County, Illinois.
This Afternoon
69°F
Rain Showers
Rain showers. Mostly cloudy. High near 69, with temperatures falling to around 66 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Troy Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Rain Showers | 15 mph S | 75% |
| Tonight | 57°F | Rain Showers | 15 mph S | 90% |
| Wednesday | 59°F | Chance Rain Showers then Mostly Cloudy | 15 mph SSW | 36% |
| Wednesday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph SW | 17% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph WSW | 45% |
| Thursday Night | 43°F | Chance Rain Showers | 5 to 10 mph NW | 37% |
| Friday | 52°F | Slight Chance Rain Showers then Partly Sunny | 10 mph N | 18% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph WNW | 3% |
| Saturday Night | 34°F | Partly Cloudy | 0 to 5 mph WSW | 4% |
| Sunday | 57°F | Mostly Sunny | 5 to 10 mph W | 13% |
| Sunday Night | 35°F | Mostly Clear | 5 mph WNW | 5% |
| Monday | 61°F | Sunny | 5 to 10 mph WSW | 2% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Troy Grove (41.466, -89.082). Updated through the day.
Growing snapshot for Troy Grove
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
176 days
Hardiness zone
5b
More local growing data for Troy Grove: nearby ZIP 61372 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
Wedron
Wenona
Climate data from the nearest NOAA station, Peru, Il (8.1 mi from Troy Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.