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
74°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny, with a high near 74. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Troy Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Chance Showers And Thunderstorms | 10 mph E | 52% |
| Tonight | 65°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph ESE | 31% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 65% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely | 5 mph NE | 79% |
| Sunday | 71°F | Showers And Thunderstorms | 10 to 15 mph NE | 79% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 15 mph NE | 70% |
| Monday | 65°F | Showers And Thunderstorms Likely | 15 mph ENE | 60% |
| Monday Night | 52°F | Chance Rain Showers | 15 mph NE | 37% |
| Tuesday | 64°F | Chance Rain Showers | 15 mph NE | 30% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 15 mph NNE | 7% |
| Wednesday | 67°F | Partly Sunny | 10 mph NNE | 5% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 69°F | Mostly Sunny | 5 mph NNE | 3% |
| Thursday Night | 53°F | Partly Cloudy | 5 mph NNE | 4% |
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
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Dayton
Earlville
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LaSalle
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Leonore
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Marseilles
Mendota
Millington
Naplate
Newark
North Utica
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Ottawa
Peru
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Rutland
Seneca
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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 Sep 18, 2026.