Twin Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Twin Grove, a community in Mclean County, Illinois.
Overnight
56°F
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 56. South southwest wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Twin Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Chance Light Rain | 16 mph SSW | 54% |
| Wednesday | 60°F | Patchy Drizzle | 16 mph SW | 13% |
| Wednesday Night | 46°F | Patchy Drizzle then Mostly Cloudy | 14 mph SW | 10% |
| Thursday | 58°F | Mostly Cloudy then Slight Chance Light Rain | 12 to 16 mph WSW | 18% |
| Thursday Night | 42°F | Chance Light Rain | 7 to 10 mph NW | 35% |
| Friday | 52°F | Partly Sunny | 13 mph NNW | 7% |
| Friday Night | 33°F | Partly Cloudy | 3 to 9 mph NNW | 0% |
| Saturday | 53°F | Sunny | 3 to 7 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 5 mph WNW | 2% |
| Sunday | 58°F | Sunny | 3 to 10 mph W | 1% |
| Sunday Night | 34°F | Clear | 6 mph W | 0% |
| Monday | 63°F | Sunny | 3 to 10 mph SW | 0% |
| Monday Night | 39°F | Clear | 5 to 8 mph SW | 0% |
| Tuesday | 66°F | Sunny | 7 mph WNW | 1% |
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
Nearby towns & communities
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Chenoa
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Downs
Ellsworth
Gridley
Heyworth
Hudson
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Le Roy
Lexington
McLean
Normal
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Shirley
Stanford
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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 Nov 4, 2026.