EN
English Español

As of 12:03 CDT

Weather in Herrin, IL

82°Current weather

Herrin, Thursday, 8 October, 12:03

Clear. Feels like 82°. High 83°, low 54°.

Pressure30.09 inHg
Wind1 mph N
Humidity41%
Visibility6.2 mi
Dew point55°
Fri, 0986° / 52°0Clear
86 °Clear

Herrin, Friday, 9 October

Clear. High 86°, low 52°.

Pressure30.15 inHg
Wind5.9 mph SE
Humidity34%
Visibility6.2 mi
Dew point50°
Sat, 1073° / 56°0.49Heavy rain
73 °Heavy rain

Herrin, Saturday, 10 October

Heavy rain. High 73°, low 56°.

Pressure30.09 inHg
Wind6.1 mph E
Humidity51%
Visibility6.2 mi
Dew point54°
Sun, 1177° / 61°0.41Heavy rain
77 °Heavy rain

Herrin, Sunday, 11 October

Heavy rain. High 77°, low 61°.

Pressure29.91 inHg
Wind10.6 mph NW
Humidity77%
Visibility6.2 mi
Dew point60°
Mon, 1285° / 59°0Clear
85 °Clear

Herrin, Monday, 12 October

Clear. High 85°, low 59°.

Pressure29.97 inHg
Wind7.7 mph SW
Humidity55%
Visibility6.2 mi
Dew point63°
Tue, 1387° / 66°0Clear
87 °Clear

Herrin, Tuesday, 13 October

Clear. High 87°, low 66°.

Pressure29.88 inHg
Wind11 mph SW
Humidity53%
Visibility—
Dew point63°
Wed, 1492° / 66°0Clear
92 °Clear

Herrin, Wednesday, 14 October

Clear. High 92°, low 66°.

Pressure29.91 inHg
Wind11.5 mph S
Humidity42%
Visibility—
Dew point60°
Thu, 1593° / 75°0Clear
93 °Clear

Herrin, Thursday, 15 October

Clear. High 93°, low 75°.

Pressure29.97 inHg
Wind16.4 mph SW
Humidity40%
Visibility—
Dew point63°
Fri, 1681° / 60°0Overcast
81 °Overcast

Herrin, Friday, 16 October

Overcast. High 81°, low 60°.

Pressure30.15 inHg
Wind15.6 mph N
Humidity44%
Visibility—
Dew point56°
Sat, 1768° / 55°0Partly cloudy
68 °Partly cloudy

Herrin, Saturday, 17 October

Partly cloudy. High 68°, low 55°.

Pressure30.47 inHg
Wind15.8 mph NE
Humidity35%
Visibility—
Dew point38°
Sun, 1871° / 44°0Clear
71 °Clear

Herrin, Sunday, 18 October

Clear. High 71°, low 44°.

Pressure30.36 inHg
Wind10.1 mph E
Humidity28%
Visibility—
Dew point30°
Mon, 1974° / 59°0.06Light rain
74 °Light rain

Herrin, Monday, 19 October

Light rain. High 74°, low 59°.

Pressure30.27 inHg
Wind13.2 mph S
Humidity30%
Visibility—
Dew point39°
Tue, 2070° / 62°0.05Light rain
70 °Light rain

Herrin, Tuesday, 20 October

Light rain. High 70°, low 62°.

Pressure30.24 inHg
Wind12.3 mph S
Humidity62%
Visibility—
Dew point55°
Wed, 2175° / 60°0.02Light rain
75 °Light rain

Herrin, Wednesday, 21 October

Light rain. High 75°, low 60°.

Pressure30.12 inHg
Wind8.4 mph SW
Humidity50%
Visibility—
Dew point51°
Thu, 2277° / 58°0.01Light rain
77 °Light rain

Herrin, Thursday, 22 October

Light rain. High 77°, low 58°.

Pressure29.97 inHg
Wind12.9 mph SW
Humidity51%
Visibility—
Dew point55°
Fri, 2369° / 44°0Clear
69 °Clear

Herrin, Friday, 23 October

Clear. High 69°, low 44°.

Pressure30.15 inHg
Wind7.6 mph SE
Humidity28%
Visibility—
Dew point30°

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.