Twin Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Twin Grove, a community in Mclean County, Illinois.
This Afternoon
79°F
Mostly Sunny
Mostly sunny, with a high near 79. East wind around 10 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Twin Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Mostly Sunny | 10 mph E | 9% |
| Tonight | 68°F | Partly Cloudy | 12 mph ESE | 6% |
| Saturday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 10 mph SSE | 23% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 8 mph ESE | 46% |
| Sunday | 79°F | Rain Showers Likely | 5 to 16 mph NNE | 64% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 13 to 17 mph NE | 65% |
| Monday | 67°F | Showers And Thunderstorms Likely | 15 to 18 mph ENE | 65% |
| Monday Night | 53°F | Chance Showers And Thunderstorms | 14 to 18 mph NE | 50% |
| Tuesday | 66°F | Chance Rain Showers | 16 mph NE | 27% |
| Tuesday Night | 51°F | Mostly Cloudy | 8 to 16 mph NNE | 6% |
| Wednesday | 68°F | Partly Sunny | 9 to 13 mph NNE | 4% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 70°F | Mostly Sunny | 6 to 9 mph NNE | 2% |
| Thursday Night | 54°F | Partly Cloudy | 5 to 8 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Twin Grove (40.479, -89.102). Updated through the day.
Growing snapshot for Twin Grove
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6a
More local growing data for Twin Grove: nearby ZIP 61705 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Bloomington 5W, Il (2.6 mi from Twin Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.