EN
English Español

As of 20:00 CDT

Weather in Lerna, IL

66°Current weather

Lerna, Thursday, 8 October, 20:00

Clear. Feels like 65°. High 80°, low 50°.

Pressure30.09 inHg
Wind2.9 mph NW
Humidity60%
Visibility6.2 mi
Dew point50°
Fri, 0984° / 51°0Clear
84 °Clear

Lerna, Friday, 9 October

Clear. High 84°, low 51°.

Pressure30.12 inHg
Wind10.4 mph S
Humidity31%
Visibility6.2 mi
Dew point46°
Sat, 1082° / 57°0Overcast
82 °Overcast

Lerna, Saturday, 10 October

Overcast. High 82°, low 57°.

Pressure30.09 inHg
Wind7.8 mph SE
Humidity37%
Visibility6.2 mi
Dew point49°
Sun, 1177° / 58°0Partly cloudy
77 °Partly cloudy

Lerna, Sunday, 11 October

Partly cloudy. High 77°, low 58°.

Pressure29.94 inHg
Wind6.4 mph N
Humidity60%
Visibility6.2 mi
Dew point55°
Mon, 1287° / 58°0Partly cloudy
87 °Partly cloudy

Lerna, Monday, 12 October

Partly cloudy. High 87°, low 58°.

Pressure29.91 inHg
Wind8.7 mph SW
Humidity44%
Visibility6.2 mi
Dew point58°
Tue, 1386° / 63°0Clear
86 °Clear

Lerna, Tuesday, 13 October

Clear. High 86°, low 63°.

Pressure29.88 inHg
Wind12.4 mph NE
Humidity36%
Visibility—
Dew point54°
Wed, 1475° / 61°0.49Rain
75 °Rain

Lerna, Wednesday, 14 October

Rain. High 75°, low 61°.

Pressure29.97 inHg
Wind10.6 mph SE
Humidity88%
Visibility—
Dew point61°
Thu, 1587° / 71°0.11Light rain
87 °Light rain

Lerna, Thursday, 15 October

Light rain. High 87°, low 71°.

Pressure30.00 inHg
Wind11.8 mph S
Humidity53%
Visibility—
Dew point64°
Fri, 1671° / 56°0.15Light rain
71 °Light rain

Lerna, Friday, 16 October

Light rain. High 71°, low 56°.

Pressure30.18 inHg
Wind14.9 mph N
Humidity85%
Visibility—
Dew point64°
Sat, 1756° / 45°0Mostly clear
56 °Mostly clear

Lerna, Saturday, 17 October

Mostly clear. High 56°, low 45°.

Pressure30.45 inHg
Wind15.4 mph N
Humidity38%
Visibility—
Dew point30°
Sun, 1859° / 38°0Mostly clear
59 °Mostly clear

Lerna, Sunday, 18 October

Mostly clear. High 59°, low 38°.

Pressure30.53 inHg
Wind10.1 mph E
Humidity33%
Visibility—
Dew point26°
Mon, 1964° / 39°0Clear
64 °Clear

Lerna, Monday, 19 October

Clear. High 64°, low 39°.

Pressure30.45 inHg
Wind8.5 mph SE
Humidity24%
Visibility—
Dew point22°
Tue, 2071° / 47°0Mostly clear
71 °Mostly clear

Lerna, Tuesday, 20 October

Mostly clear. High 71°, low 47°.

Pressure30.27 inHg
Wind11.4 mph S
Humidity31%
Visibility—
Dew point34°
Wed, 2168° / 54°0.19Light rain
68 °Light rain

Lerna, Wednesday, 21 October

Light rain. High 68°, low 54°.

Pressure30.15 inHg
Wind12.9 mph SW
Humidity60%
Visibility—
Dew point45°
Thu, 2271° / 54°0.09Light rain
71 °Light rain

Lerna, Thursday, 22 October

Light rain. High 71°, low 54°.

Pressure30.15 inHg
Wind6.1 mph N
Humidity46%
Visibility—
Dew point46°
Fri, 2372° / 54°0Partly cloudy
72 °Partly cloudy

Lerna, Friday, 23 October

Partly cloudy. High 72°, low 54°.

Pressure30.21 inHg
Wind5.7 mph NW
Humidity41%
Visibility—
Dew point44°

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.