Lerna, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms then Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Lerna, IL in one place.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 82. West northwest wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Local Weather Overview
This forecast page for Lerna, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 12, 2026 1:57 PM CDT.
The active forecast window currently covers Oct 14 to Oct 18, 2026 for Lerna, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 14 to Oct 18, 2026
- Latest sync
- Oct 12, 2026 1:57 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lerna
Wednesday looks like the warmest upcoming period in Lerna at 82 degrees F.
Saturday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 17 to 22 mph NNW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 12, 2026 1:57 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms. Mostly cloudy, with a low around 62. North northeast wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 78. South southeast wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 7am. Partly sunny, with a high near 62. Chance of precipitation is 30%.
Mostly clear, with a low around 36.
Sunny, with a high near 60.
Clear, with a low around 35.
Sunny, with a high near 67.
Mostly clear, with a low around 43.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Oct 14
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
82°F |
6 mph
WNW
|
|
Wednesday Night
Oct 14
|
Showers And Thunderstorms
|
62°F |
6 mph
NNE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
78°F |
6 to 9 mph
SSE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
51°F |
9 to 17 mph
WNW
|
|
Friday
Oct 16
|
Chance Showers And Thunderstorms then Partly Sunny
|
62°F |
17 to 22 mph
NNW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
36°F |
8 to 20 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
60°F |
3 to 7 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear
|
35°F |
3 mph
ESE
|
|
Sunday
Oct 18
|
Sunny
|
67°F |
5 to 9 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
43°F |
6 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lerna.