As of 06:06 CDT

Weather in Lerna, IL

52°

Lerna, Thursday, 8 October, 06:06

Clear. Feels like 50°. High 83°, low 52°.

Pressure30.03 inHg

Wind0 mph N

Humidity82%

Visibility6.2 mi

Dew point47°

See detailed hourly forecast

Fri, 0987° / 52°

87 °

Lerna, Friday, 9 October

Clear. High 87°, low 52°.

Pressure30.15 inHg

Wind9.3 mph S

Humidity27%

Visibility6.2 mi

Dew point44°

Sat, 1082° / 60°

82 °

Lerna, Saturday, 10 October

Overcast. High 82°, low 60°.

Pressure30.12 inHg

Wind5.4 mph SE

Humidity44%

Visibility6.2 mi

Dew point54°

Sun, 1174° / 59°

74 °

Lerna, Sunday, 11 October

Overcast. High 74°, low 59°.

Pressure29.94 inHg

Wind5 mph NE

Humidity59%

Visibility6.2 mi

Dew point56°

Mon, 1287° / 57°

87 °

Lerna, Monday, 12 October

Clear. High 87°, low 57°.

Pressure29.91 inHg

Wind11.4 mph S

Humidity33%

Visibility—

Dew point49°

Tue, 1385° / 62°

85 °

Lerna, Tuesday, 13 October

Mostly clear. High 85°, low 62°.

Pressure29.85 inHg

Wind11.2 mph SW

Humidity46%

Visibility—

Dew point60°

Wed, 1475° / 47°

75 °

Lerna, Wednesday, 14 October

Clear. High 75°, low 47°.

Pressure30.06 inHg

Wind10.5 mph SE

Humidity29%

Visibility—

Dew point34°

Thu, 1592° / 62°

92 °

Lerna, Thursday, 15 October

Clear. High 92°, low 62°.

Pressure29.91 inHg

Wind21.4 mph SW

Humidity34%

Visibility—

Dew point55°

Fri, 1680° / 63°

0.11

80 °

Lerna, Friday, 16 October

Light rain. High 80°, low 63°.

Pressure30.06 inHg

Wind19.2 mph S

Humidity65%

Visibility—

Dew point65°

Sat, 1762° / 53°

62 °

Lerna, Saturday, 17 October

Overcast. High 62°, low 53°.

Pressure30.36 inHg

Wind12.5 mph N

Humidity51%

Visibility—

Dew point42°

Sun, 1872° / 55°

72 °

Lerna, Sunday, 18 October

Overcast. High 72°, low 55°.

Pressure30.21 inHg

Wind6.4 mph NE

Humidity41%

Visibility—

Dew point45°

Mon, 1979° / 60°

0.01

79 °

Lerna, Monday, 19 October

Light rain. High 79°, low 60°.

Pressure30.12 inHg

Wind6.1 mph NE

Humidity52%

Visibility—

Dew point53°

Tue, 2075° / 60°

0.05

75 °

Lerna, Tuesday, 20 October

Light rain. High 75°, low 60°.

Pressure30.06 inHg

Wind8.9 mph N

Humidity49%

Visibility—

Dew point52°

Wed, 2173° / 54°

73 °

Lerna, Wednesday, 21 October

Clear. High 73°, low 54°.

Pressure29.97 inHg

Wind7.3 mph E

Humidity43%

Visibility—

Dew point46°

Thu, 2281° / 52°

81 °

Lerna, Thursday, 22 October

Partly cloudy. High 81°, low 52°.

Pressure29.74 inHg

Wind14.6 mph S

Humidity36%

Visibility—

Dew point45°

Fri, 2385° / 64°

0.07

85 °

Lerna, Friday, 23 October

Light rain. High 85°, low 64°.

Pressure29.85 inHg

Wind15.5 mph S

Humidity43%

Visibility—

Dew point57°

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.