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As of 11:03 CDT

Weather in Herrin, IL

65°Current weather

Herrin, Saturday, 10 October, 11:03

Overcast. Feels like 64°. High 75°, low 56°.

Pressure30.09 inHg
Wind0 mph N
Humidity72%
Visibility6.2 mi
Dew point56°
Sun, 1183° / 51°0Clear
83 °Clear

Herrin, Sunday, 11 October

Clear. High 83°, low 51°.

Pressure30.03 inHg
Wind4.6 mph NW
Humidity57%
Visibility6.2 mi
Dew point57°
Mon, 1288° / 59°0Clear
88 °Clear

Herrin, Monday, 12 October

Clear. High 88°, low 59°.

Pressure29.97 inHg
Wind10.2 mph SW
Humidity44%
Visibility6.2 mi
Dew point60°
Tue, 1389° / 67°0Clear
89 °Clear

Herrin, Tuesday, 13 October

Clear. High 89°, low 67°.

Pressure29.94 inHg
Wind9.3 mph SW
Humidity45%
Visibility6.2 mi
Dew point62°
Wed, 1478° / 71°0.58Rain
78 °Rain

Herrin, Wednesday, 14 October

Rain. High 78°, low 71°.

Pressure30.03 inHg
Wind9.8 mph SW
Humidity90%
Visibility—
Dew point72°
Thu, 1576° / 65°0.46Rain
76 °Rain

Herrin, Thursday, 15 October

Rain. High 76°, low 65°.

Pressure30.12 inHg
Wind9.2 mph E
Humidity77%
Visibility—
Dew point67°
Fri, 1668° / 51°1Heavy rain
68 °Heavy rain

Herrin, Friday, 16 October

Heavy rain. High 68°, low 51°.

Pressure30.03 inHg
Wind18.8 mph W
Humidity41%
Visibility—
Dew point40°
Sat, 1746° / 38°0Overcast
46 °Overcast

Herrin, Saturday, 17 October

Overcast. High 46°, low 38°.

Pressure30.36 inHg
Wind18.6 mph NW
Humidity40%
Visibility—
Dew point21°
Sun, 1852° / 31°0Clear
52 °Clear

Herrin, Sunday, 18 October

Clear. High 52°, low 31°.

Pressure30.50 inHg
Wind6.6 mph N
Humidity34%
Visibility—
Dew point21°
Mon, 1959° / 35°0Clear
59 °Clear

Herrin, Monday, 19 October

Clear. High 59°, low 35°.

Pressure30.45 inHg
Wind8.5 mph S
Humidity33%
Visibility—
Dew point26°
Tue, 2065° / 41°0Overcast
65 °Overcast

Herrin, Tuesday, 20 October

Overcast. High 65°, low 41°.

Pressure30.33 inHg
Wind10.8 mph S
Humidity36%
Visibility—
Dew point34°
Wed, 2164° / 49°0.28Rain
64 °Rain

Herrin, Wednesday, 21 October

Rain. High 64°, low 49°.

Pressure30.12 inHg
Wind16.1 mph S
Humidity55%
Visibility—
Dew point46°
Thu, 2268° / 47°0Clear
68 °Clear

Herrin, Thursday, 22 October

Clear. High 68°, low 47°.

Pressure30.24 inHg
Wind6.7 mph SW
Humidity42%
Visibility—
Dew point40°
Fri, 2371° / 49°0Mostly clear
71 °Mostly clear

Herrin, Friday, 23 October

Mostly clear. High 71°, low 49°.

Pressure30.18 inHg
Wind6.4 mph SW
Humidity39%
Visibility—
Dew point41°
Sat, 2471° / 49°0Clear
71 °Clear

Herrin, Saturday, 24 October

Clear. High 71°, low 49°.

Pressure30.15 inHg
Wind6.7 mph S
Humidity34%
Visibility—
Dew point37°
Sun, 2570° / 54°0.03Light rain
70 °Light rain

Herrin, Sunday, 25 October

Light rain. High 70°, low 54°.

Pressure29.85 inHg
Wind16 mph SW
Humidity47%
Visibility—
Dew point47°

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 Herrin, 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 Herrin, 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.