Twin Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Twin Grove, a community in Mclean County, Illinois.
Today
85°F
Sunny
Sunny, with a high near 85. South wind around 7 mph.
7-day forecast for Twin Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 7 mph S | 0% |
| Tonight | 66°F | Partly Cloudy | 7 mph SSE | 1% |
| Wednesday | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph SSW | 25% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 7 mph S | 81% |
| Thursday | 81°F | Showers And Thunderstorms | 7 mph SSW | 81% |
| Thursday Night | 64°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph SSE | 16% |
| Friday | 83°F | Mostly Sunny | 3 mph S | 11% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph S | 22% |
| Saturday | 85°F | Mostly Sunny | 5 to 8 mph SSW | 12% |
| Saturday Night | 70°F | Mostly Clear | 9 mph S | 12% |
| Sunday | 88°F | Sunny | 10 to 15 mph SSW | 10% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 9 to 14 mph SSW | 15% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms | 9 to 13 mph SSW | 15% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 12 mph SW | 28% |
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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McLean
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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 Aug 4, 2026.