Lerna, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lerna, a village in Coles County, Illinois.
Tonight
69°F
Partly Cloudy
Partly cloudy, with a low around 69. East southeast wind around 8 mph.
7-day forecast for Lerna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Partly Cloudy | 8 mph ESE | 8% |
| Saturday | 92°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 7 to 10 mph SSW | 28% |
| Saturday Night | 70°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 8 mph S | 16% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 5 to 9 mph WNW | 29% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 10 mph NNE | 52% |
| Monday | 74°F | Showers And Thunderstorms Likely | 13 mph NE | 61% |
| Monday Night | 56°F | Showers And Thunderstorms Likely | 10 to 14 mph NE | 60% |
| Tuesday | 70°F | Chance Showers And Thunderstorms then Mostly Cloudy | 13 mph NNE | 37% |
| Tuesday Night | 53°F | Mostly Cloudy | 7 to 13 mph NNE | 8% |
| Wednesday | 71°F | Partly Sunny | 10 mph NNE | 3% |
| Wednesday Night | 54°F | Partly Cloudy | 5 to 9 mph NNE | 3% |
| Thursday | 73°F | Mostly Sunny | 8 mph NNE | 3% |
| Thursday Night | 55°F | Partly Cloudy | 7 mph NNE | 4% |
| Friday | 74°F | Mostly Sunny | 8 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Lerna (39.418, -88.289). Updated through the day.
Growing snapshot for Lerna
Last spring frost
Apr 15
First fall frost
Oct 24
Growing season
189 days
Hardiness zone
6a
More local growing data for Lerna: nearby ZIP 62440 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mattoon Coles Co Ap, Il (5.9 mi from Lerna). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.