As of 01:11 CDT

Weather in Arnold, IL

50°

Arnold, Thursday, 8 October, 01:11

Clear. Feels like 50°. High 81°, low 50°.

Pressure30.00 inHg

Wind0 mph N

Humidity100%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Fri, 0986° / 54°

86 °

Arnold, Friday, 9 October

Clear. High 86°, low 54°.

Pressure30.09 inHg

Wind11 mph S

Humidity33%

Visibility6.2 mi

Dew point48°

Sat, 1085° / 61°

85 °

Arnold, Saturday, 10 October

Clear. High 85°, low 61°.

Pressure30.09 inHg

Wind9.3 mph S

Humidity41%

Visibility6.2 mi

Dew point56°

Sun, 1174° / 60°

0.04

74 °

Arnold, Sunday, 11 October

Light rain. High 74°, low 60°.

Pressure29.94 inHg

Wind5.3 mph NE

Humidity58%

Visibility6.2 mi

Dew point56°

Mon, 1290° / 60°

90 °

Arnold, Monday, 12 October

Clear. High 90°, low 60°.

Pressure29.83 inHg

Wind13.7 mph SW

Humidity41%

Visibility—

Dew point56°

Tue, 1377° / 52°

77 °

Arnold, Tuesday, 13 October

Overcast. High 77°, low 52°.

Pressure30.06 inHg

Wind14.9 mph NW

Humidity48%

Visibility—

Dew point44°

Wed, 1469° / 47°

69 °

Arnold, Wednesday, 14 October

Overcast. High 69°, low 47°.

Pressure30.03 inHg

Wind17.6 mph SE

Humidity50%

Visibility—

Dew point38°

Thu, 1596° / 67°

96 °

Arnold, Thursday, 15 October

Clear. High 96°, low 67°.

Pressure29.80 inHg

Wind21.3 mph S

Humidity38%

Visibility—

Dew point61°

Fri, 1683° / 57°

0.11

83 °

Arnold, Friday, 16 October

Light rain. High 83°, low 57°.

Pressure29.91 inHg

Wind19.2 mph SW

Humidity60%

Visibility—

Dew point65°

Sat, 1758° / 45°

58 °

Arnold, Saturday, 17 October

Overcast. High 58°, low 45°.

Pressure30.21 inHg

Wind13.5 mph W

Humidity40%

Visibility—

Dew point31°

Sun, 1860° / 40°

60 °

Arnold, Sunday, 18 October

Clear. High 60°, low 40°.

Pressure30.30 inHg

Wind9.5 mph NW

Humidity39%

Visibility—

Dew point30°

Mon, 1968° / 42°

68 °

Arnold, Monday, 19 October

Overcast. High 68°, low 42°.

Pressure30.27 inHg

Wind7.8 mph S

Humidity30%

Visibility—

Dew point29°

Tue, 2072° / 48°

72 °

Arnold, Tuesday, 20 October

Partly cloudy. High 72°, low 48°.

Pressure30.12 inHg

Wind13.7 mph N

Humidity27%

Visibility—

Dew point33°

Wed, 2162° / 42°

62 °

Arnold, Wednesday, 21 October

Overcast. High 62°, low 42°.

Pressure30.18 inHg

Wind9.9 mph E

Humidity34%

Visibility—

Dew point30°

Thu, 2271° / 49°

71 °

Arnold, Thursday, 22 October

Overcast. High 71°, low 49°.

Pressure29.71 inHg

Wind16.5 mph SE

Humidity32%

Visibility—

Dew point37°

Fri, 2357° / 53°

0.18

57 °

Arnold, Friday, 23 October

Rain. High 57°, low 53°.

Pressure29.80 inHg

Wind12.5 mph S

Humidity70%

Visibility—

Dew point45°

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.