Lexington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lexington, a city in Mclean County, Illinois.
This Afternoon
78°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 5pm. Partly sunny, with a high near 78. East wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Lexington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Showers And Thunderstorms Likely | 10 mph E | 58% |
| Tonight | 67°F | Partly Cloudy | 10 mph ESE | 12% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 10 mph SSE | 34% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 8 mph S | 56% |
| Sunday | 77°F | Showers And Thunderstorms Likely | 5 to 14 mph NNE | 64% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 12 to 15 mph NE | 68% |
| Monday | 67°F | Showers And Thunderstorms Likely | 13 to 16 mph ENE | 68% |
| Monday Night | 51°F | Chance Showers And Thunderstorms | 12 to 16 mph NE | 48% |
| Tuesday | 66°F | Chance Rain Showers | 12 to 15 mph NE | 26% |
| Tuesday Night | 50°F | Mostly Cloudy | 6 to 13 mph NNE | 8% |
| Wednesday | 69°F | Partly Sunny | 7 to 10 mph NNE | 5% |
| Wednesday Night | 51°F | Partly Cloudy | 3 to 10 mph NNE | 5% |
| Thursday | 70°F | Mostly Sunny | 5 to 9 mph NNE | 2% |
| Thursday Night | 53°F | Partly Cloudy | 3 to 7 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Lexington (40.647, -88.784). Updated through the day.
Growing snapshot for Lexington
Last spring frost
Apr 23
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
6a
More local growing data for Lexington: nearby ZIP 61753 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Chenoa, Il (8.5 mi from Lexington). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.