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As of 16:08 CDT

Weather in Lerna, IL

89°Current weather

Lerna, Saturday, 8 August, 16:08

Partly cloudy. Feels like 101°. High 89°, low 71°.

Pressure30.00 inHg
Wind7.5 mph SW
Humidity69%
Visibility6.2 mi
Dew point77°
Sun, 0992° / 71°0Partly cloudy
92 °Partly cloudy

Lerna, Sunday, 9 August

Partly cloudy. High 92°, low 71°.

Pressure30.00 inHg
Wind12.5 mph S
Humidity68%
Visibility6.2 mi
Dew point73°
Mon, 1091° / 74°0Clear
91 °Clear

Lerna, Monday, 10 August

Clear. High 91°, low 74°.

Pressure29.97 inHg
Wind13.1 mph SW
Humidity66%
Visibility6.2 mi
Dew point74°
Tue, 1190° / 74°0Overcast
90 °Overcast

Lerna, Tuesday, 11 August

Overcast. High 90°, low 74°.

Pressure29.88 inHg
Wind14.5 mph SW
Humidity63%
Visibility6.2 mi
Dew point74°
Wed, 1287° / 70°0.25Rain
87 °Rain

Lerna, Wednesday, 12 August

Rain. High 87°, low 70°.

Pressure29.83 inHg
Wind5.7 mph N
Humidity72%
Visibility6.2 mi
Dew point75°
Thu, 1380° / 67°0.61Rain
80 °Rain

Lerna, Thursday, 13 August

Rain. High 80°, low 67°.

Pressure29.88 inHg
Wind11.4 mph NE
Humidity74%
Visibility—
Dew point69°
Fri, 1474° / 60°0Clear
74 °Clear

Lerna, Friday, 14 August

Clear. High 74°, low 60°.

Pressure30.15 inHg
Wind11.9 mph NE
Humidity52%
Visibility—
Dew point53°
Sat, 1574° / 53°0Partly cloudy
74 °Partly cloudy

Lerna, Saturday, 15 August

Partly cloudy. High 74°, low 53°.

Pressure30.30 inHg
Wind7 mph SE
Humidity59%
Visibility—
Dew point55°
Sun, 1677° / 56°0Overcast
77 °Overcast

Lerna, Sunday, 16 August

Overcast. High 77°, low 56°.

Pressure30.21 inHg
Wind10.4 mph S
Humidity59%
Visibility—
Dew point58°
Mon, 1784° / 66°0.07Light rain
84 °Light rain

Lerna, Monday, 17 August

Light rain. High 84°, low 66°.

Pressure29.97 inHg
Wind14.2 mph S
Humidity82%
Visibility—
Dew point72°
Tue, 1882° / 70°0.01Light rain
82 °Light rain

Lerna, Tuesday, 18 August

Light rain. High 82°, low 70°.

Pressure29.97 inHg
Wind8.5 mph NE
Humidity71%
Visibility—
Dew point70°
Wed, 1986° / 68°0Overcast
86 °Overcast

Lerna, Wednesday, 19 August

Overcast. High 86°, low 68°.

Pressure29.94 inHg
Wind7.5 mph S
Humidity66%
Visibility—
Dew point69°
Thu, 2084° / 71°0.29Rain
84 °Rain

Lerna, Thursday, 20 August

Rain. High 84°, low 71°.

Pressure29.88 inHg
Wind9.8 mph SW
Humidity68%
Visibility—
Dew point69°
Fri, 2181° / 65°0Overcast
81 °Overcast

Lerna, Friday, 21 August

Overcast. High 81°, low 65°.

Pressure29.94 inHg
Wind11.5 mph NE
Humidity62%
Visibility—
Dew point63°
Sat, 2285° / 63°0Mostly clear
85 °Mostly clear

Lerna, Saturday, 22 August

Mostly clear. High 85°, low 63°.

Pressure29.91 inHg
Wind16.5 mph NE
Humidity53%
Visibility—
Dew point61°
Sun, 2372° / 55°0Partly cloudy
72 °Partly cloudy

Lerna, Sunday, 23 August

Partly cloudy. High 72°, low 55°.

Pressure30.15 inHg
Wind13.8 mph E
Humidity48%
Visibility—
Dew point49°

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.