Lerna, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lerna, a village in Coles County, Illinois.
This Afternoon
75°F
Slight Chance Light Rain
A slight chance of rain after 5pm. Partly sunny, with a high near 75. South southeast wind around 20 mph, with gusts as high as 33 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Lerna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Slight Chance Light Rain | 20 mph SSE | 20% |
| Tonight | 57°F | Rain | 14 to 18 mph S | 91% |
| Wednesday | 63°F | Chance Light Rain then Mostly Cloudy | 9 to 14 mph SSW | 31% |
| Wednesday Night | 45°F | Mostly Cloudy | 8 mph SW | 0% |
| Thursday | 63°F | Sunny | 7 to 13 mph WSW | 1% |
| Thursday Night | 44°F | Mostly Cloudy | 6 mph WNW | 4% |
| Friday | 56°F | Partly Sunny | 6 to 10 mph NNW | 12% |
| Friday Night | 38°F | Partly Cloudy | 7 mph NNW | 6% |
| Saturday | 54°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 3 mph WNW | 1% |
| Sunday | 60°F | Sunny | 3 to 8 mph WNW | 9% |
| Sunday Night | 35°F | Mostly Clear | 5 mph NW | 6% |
| Monday | 63°F | Sunny | 5 to 9 mph WSW | 4% |
| Monday Night | 39°F | Mostly Clear | 6 mph WSW | 1% |
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 Nov 3, 2026.