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As of 09:56 CDT

Weather in Lerna, IL

65°Current weather

Lerna, Thursday, 8 October, 09:56

Clear. Feels like 64°. High 81°, low 51°.

Pressure30.09 inHg
Wind4.6 mph NW
Humidity62%
Visibility6.2 mi
Dew point51°
Fri, 0986° / 53°0Mostly clear
86 °Mostly clear

Lerna, Friday, 9 October

Mostly clear. High 86°, low 53°.

Pressure30.15 inHg
Wind9 mph S
Humidity29%
Visibility6.2 mi
Dew point45°
Sat, 1080° / 56°0Overcast
80 °Overcast

Lerna, Saturday, 10 October

Overcast. High 80°, low 56°.

Pressure30.09 inHg
Wind7.5 mph SE
Humidity40%
Visibility6.2 mi
Dew point51°
Sun, 1174° / 60°0.06Light rain
74 °Light rain

Lerna, Sunday, 11 October

Light rain. High 74°, low 60°.

Pressure29.91 inHg
Wind7.9 mph N
Humidity73%
Visibility6.2 mi
Dew point57°
Mon, 1287° / 57°0Clear
87 °Clear

Lerna, Monday, 12 October

Clear. High 87°, low 57°.

Pressure29.91 inHg
Wind10.7 mph S
Humidity37%
Visibility—
Dew point53°
Tue, 1388° / 69°0Clear
88 °Clear

Lerna, Tuesday, 13 October

Clear. High 88°, low 69°.

Pressure29.85 inHg
Wind11.6 mph NE
Humidity39%
Visibility—
Dew point56°
Wed, 1482° / 58°0.01Light rain
82 °Light rain

Lerna, Wednesday, 14 October

Light rain. High 82°, low 58°.

Pressure29.97 inHg
Wind14.7 mph SE
Humidity49%
Visibility—
Dew point52°
Thu, 1594° / 72°0Clear
94 °Clear

Lerna, Thursday, 15 October

Clear. High 94°, low 72°.

Pressure29.91 inHg
Wind19.5 mph SW
Humidity34%
Visibility—
Dew point59°
Fri, 1677° / 56°0.33Light rain
77 °Light rain

Lerna, Friday, 16 October

Light rain. High 77°, low 56°.

Pressure30.18 inHg
Wind14.4 mph N
Humidity62%
Visibility—
Dew point54°
Sat, 1761° / 48°0Mostly clear
61 °Mostly clear

Lerna, Saturday, 17 October

Mostly clear. High 61°, low 48°.

Pressure30.53 inHg
Wind16.9 mph NE
Humidity39%
Visibility—
Dew point34°
Sun, 1864° / 42°0Overcast
64 °Overcast

Lerna, Sunday, 18 October

Overcast. High 64°, low 42°.

Pressure30.42 inHg
Wind11 mph E
Humidity28%
Visibility—
Dew point25°
Mon, 1967° / 52°0.01Light rain
67 °Light rain

Lerna, Monday, 19 October

Light rain. High 67°, low 52°.

Pressure30.24 inHg
Wind13.7 mph S
Humidity50%
Visibility—
Dew point46°
Tue, 2075° / 60°0.05Light rain
75 °Light rain

Lerna, Tuesday, 20 October

Light rain. High 75°, low 60°.

Pressure30.18 inHg
Wind12.2 mph SW
Humidity56%
Visibility—
Dew point57°
Wed, 2176° / 57°0.04Light rain
76 °Light rain

Lerna, Wednesday, 21 October

Light rain. High 76°, low 57°.

Pressure30.09 inHg
Wind9.4 mph W
Humidity53%
Visibility—
Dew point54°
Thu, 2275° / 54°0.04Light rain
75 °Light rain

Lerna, Thursday, 22 October

Light rain. High 75°, low 54°.

Pressure29.91 inHg
Wind19.4 mph NW
Humidity48%
Visibility—
Dew point53°
Fri, 2363° / 43°0Clear
63 °Clear

Lerna, Friday, 23 October

Clear. High 63°, low 43°.

Pressure30.18 inHg
Wind8.5 mph W
Humidity34%
Visibility—
Dew point30°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Lerna, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Lerna, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.