Lerna, IL Weather Forecast
Local 7-day forecast
Scattered Showers And Thunderstorms then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Lerna, IL in one place.
Scattered showers and thunderstorms before 7am. Mostly sunny, with a high near 74. West southwest wind around 12 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth 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: Apr 21, 2026 10:08 PM CDT.
The active forecast window currently covers Apr 22 to Apr 28, 2026 for Lerna, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 28, 2026
- Latest sync
- Apr 21, 2026 10:08 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lerna
Thursday looks like the warmest upcoming period in Lerna at 78 degrees F.
Saturday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Monday at about 15 to 18 mph SE.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 21, 2026 10:08 PM CDT
- Coverage
- 7 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
Mostly clear, with a low around 57. South wind around 7 mph.
Sunny, with a high near 78. South wind 6 to 16 mph, with gusts as high as 28 mph.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 74. South southwest wind 10 to 15 mph, with gusts as high as 24 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. Mostly cloudy, with a low around 54. West northwest wind 5 to 9 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of rain showers. Mostly sunny, with a high near 73.
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 50.
Mostly sunny, with a high near 74.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Showers and thunderstorms likely. Partly sunny, with a high near 75.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
A chance of rain showers before 1pm. Mostly sunny, with a high near 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Scattered Showers And Thunderstorms then Mostly Sunny
|
74°F |
12 mph
WSW
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
57°F |
7 mph
S
|
|
Thursday
Apr 23
|
Sunny
|
78°F |
6 to 16 mph
S
|
|
Thursday Night
Apr 23
|
Partly Cloudy then Chance Showers And Thunderstorms
|
61°F |
14 mph
S
|
|
Friday
Apr 24
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
74°F |
10 to 15 mph
SSW
|
|
Friday Night
Apr 24
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
54°F |
5 to 9 mph
WNW
|
|
Saturday
Apr 25
|
Slight Chance Rain Showers
|
73°F |
10 mph
N
|
|
Saturday Night
Apr 25
|
Slight Chance Rain Showers then Partly Cloudy
|
50°F |
8 mph
NE
|
|
Sunday
Apr 26
|
Mostly Sunny
|
74°F |
10 mph
ENE
|
|
Sunday Night
Apr 26
|
Slight Chance Showers And Thunderstorms
|
55°F |
9 to 15 mph
E
|
|
Monday
Apr 27
|
Showers And Thunderstorms Likely
|
75°F |
15 to 18 mph
SE
|
|
Monday Night
Apr 27
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
52°F |
14 mph
SW
|
|
Tuesday
Apr 28
|
Chance Rain Showers
|
67°F |
12 to 15 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lerna.