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As of 01:19 CDT

Weather in Arnold, IL

55°Current weather

Arnold, Friday, 9 October, 01:19

Overcast. Feels like 54°. High 85°, low 55°.

Pressure30.09 inHg
Wind4.6 mph E
Humidity67%
Visibility6.2 mi
Dew point45°
Sat, 1082° / 56°0Overcast
82 °Overcast

Arnold, Saturday, 10 October

Overcast. High 82°, low 56°.

Pressure30.06 inHg
Wind7.2 mph SE
Humidity44%
Visibility6.2 mi
Dew point53°
Sun, 1179° / 56°0Clear
79 °Clear

Arnold, Sunday, 11 October

Clear. High 79°, low 56°.

Pressure29.94 inHg
Wind4.7 mph NW
Humidity58%
Visibility6.2 mi
Dew point57°
Mon, 1289° / 65°0Mostly clear
89 °Mostly clear

Arnold, Monday, 12 October

Mostly clear. High 89°, low 65°.

Pressure29.85 inHg
Wind10.5 mph SW
Humidity46%
Visibility6.2 mi
Dew point60°
Tue, 1386° / 70°0.06Light rain
86 °Light rain

Arnold, Tuesday, 13 October

Light rain. High 86°, low 70°.

Pressure29.85 inHg
Wind12.3 mph SW
Humidity51%
Visibility—
Dew point64°
Wed, 1471° / 63°0.83Heavy rain
71 °Heavy rain

Arnold, Wednesday, 14 October

Heavy rain. High 71°, low 63°.

Pressure30.00 inHg
Wind12.6 mph E
Humidity83%
Visibility—
Dew point60°
Thu, 1589° / 67°0.48Rain
89 °Rain

Arnold, Thursday, 15 October

Rain. High 89°, low 67°.

Pressure29.80 inHg
Wind20.5 mph SW
Humidity44%
Visibility—
Dew point62°
Fri, 1670° / 52°0.06Light rain
70 °Light rain

Arnold, Friday, 16 October

Light rain. High 70°, low 52°.

Pressure30.15 inHg
Wind13.3 mph NW
Humidity60%
Visibility—
Dew point46°
Sat, 1753° / 43°0Clear
53 °Clear

Arnold, Saturday, 17 October

Clear. High 53°, low 43°.

Pressure30.50 inHg
Wind15.5 mph N
Humidity36%
Visibility—
Dew point25°
Sun, 1856° / 39°0Overcast
56 °Overcast

Arnold, Sunday, 18 October

Overcast. High 56°, low 39°.

Pressure30.47 inHg
Wind7.1 mph E
Humidity36%
Visibility—
Dew point26°
Mon, 1956° / 41°0Overcast
56 °Overcast

Arnold, Monday, 19 October

Overcast. High 56°, low 41°.

Pressure30.47 inHg
Wind8.8 mph E
Humidity36%
Visibility—
Dew point27°
Tue, 2052° / 51°0.02Light rain
52 °Light rain

Arnold, Tuesday, 20 October

Light rain. High 52°, low 51°.

Pressure30.33 inHg
Wind6.1 mph E
Humidity67%
Visibility—
Dew point40°
Wed, 2171° / 47°0Clear
71 °Clear

Arnold, Wednesday, 21 October

Clear. High 71°, low 47°.

Pressure30.18 inHg
Wind7.7 mph SW
Humidity51%
Visibility—
Dew point46°
Thu, 2271° / 53°0Clear
71 °Clear

Arnold, Thursday, 22 October

Clear. High 71°, low 53°.

Pressure30.15 inHg
Wind9.6 mph N
Humidity56%
Visibility—
Dew point51°
Fri, 2362° / 48°0Clear
62 °Clear

Arnold, Friday, 23 October

Clear. High 62°, low 48°.

Pressure30.27 inHg
Wind11.4 mph N
Humidity41%
Visibility—
Dew point36°
Sat, 2464° / 43°0Clear
64 °Clear

Arnold, Saturday, 24 October

Clear. High 64°, low 43°.

Pressure30.21 inHg
Wind11 mph SW
Humidity32%
Visibility—
Dew point31°

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 Arnold, 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 Arnold, 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.