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As of 17:51 CDT

Weather in Herrin, IL

87°Current weather

Herrin, Saturday, 8 August, 17:51

Partly cloudy. Feels like 96°. High 89°, low 72°.

Pressure30.00 inHg
Wind1 mph N
Humidity66%
Visibility6.2 mi
Dew point74°
Sun, 0993° / 73°0Mostly clear
93 °Mostly clear

Herrin, Sunday, 9 August

Mostly clear. High 93°, low 73°.

Pressure30.00 inHg
Wind12.3 mph S
Humidity46%
Visibility6.2 mi
Dew point67°
Mon, 1098° / 76°0Clear
98 °Clear

Herrin, Monday, 10 August

Clear. High 98°, low 76°.

Pressure30.00 inHg
Wind14.6 mph SW
Humidity42%
Visibility6.2 mi
Dew point68°
Tue, 11101° / 79°0Clear
101 °Clear

Herrin, Tuesday, 11 August

Clear. High 101°, low 79°.

Pressure29.91 inHg
Wind15.2 mph SW
Humidity38%
Visibility6.2 mi
Dew point67°
Wed, 1294° / 78°0Overcast
94 °Overcast

Herrin, Wednesday, 12 August

Overcast. High 94°, low 78°.

Pressure29.85 inHg
Wind15.2 mph W
Humidity35%
Visibility6.2 mi
Dew point65°
Thu, 1380° / 72°0.57Rain
80 °Rain

Herrin, Thursday, 13 August

Rain. High 80°, low 72°.

Pressure29.85 inHg
Wind9.6 mph SW
Humidity89%
Visibility—
Dew point73°
Fri, 1482° / 64°0.2Rain
82 °Rain

Herrin, Friday, 14 August

Rain. High 82°, low 64°.

Pressure30.09 inHg
Wind11.9 mph NE
Humidity49%
Visibility—
Dew point59°
Sat, 1584° / 57°0Partly cloudy
84 °Partly cloudy

Herrin, Saturday, 15 August

Partly cloudy. High 84°, low 57°.

Pressure30.27 inHg
Wind10.2 mph E
Humidity35%
Visibility—
Dew point47°
Sun, 1686° / 61°0.01Light rain
86 °Light rain

Herrin, Sunday, 16 August

Light rain. High 86°, low 61°.

Pressure30.18 inHg
Wind8.2 mph S
Humidity39%
Visibility—
Dew point54°
Mon, 1792° / 70°0.21Light rain
92 °Light rain

Herrin, Monday, 17 August

Light rain. High 92°, low 70°.

Pressure30.00 inHg
Wind18.2 mph SW
Humidity58%
Visibility—
Dew point69°
Tue, 1893° / 73°0Overcast
93 °Overcast

Herrin, Tuesday, 18 August

Overcast. High 93°, low 73°.

Pressure29.94 inHg
Wind12.3 mph S
Humidity48%
Visibility—
Dew point68°
Wed, 1994° / 72°0Clear
94 °Clear

Herrin, Wednesday, 19 August

Clear. High 94°, low 72°.

Pressure29.91 inHg
Wind8 mph SW
Humidity45%
Visibility—
Dew point67°
Thu, 2093° / 75°0.32Rain
93 °Rain

Herrin, Thursday, 20 August

Rain. High 93°, low 75°.

Pressure29.85 inHg
Wind13.3 mph NW
Humidity48%
Visibility—
Dew point67°
Fri, 2183° / 72°0.16Light rain
83 °Light rain

Herrin, Friday, 21 August

Light rain. High 83°, low 72°.

Pressure29.88 inHg
Wind9.2 mph NE
Humidity73%
Visibility—
Dew point72°
Sat, 2289° / 67°0Overcast
89 °Overcast

Herrin, Saturday, 22 August

Overcast. High 89°, low 67°.

Pressure29.91 inHg
Wind9.4 mph N
Humidity41%
Visibility—
Dew point59°
Sun, 2381° / 64°0Overcast
81 °Overcast

Herrin, Sunday, 23 August

Overcast. High 81°, low 64°.

Pressure30.09 inHg
Wind11.8 mph NE
Humidity54%
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 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.