As of 00:53 CDT

Weather in Belleville, IL

66°

Belleville, Thursday, 8 October, 00:53

Clear. Feels like 66°. High 85°, low 52°.

Pressure29.97 inHg

Wind4.6 mph N

Humidity73%

Visibility6.2 mi

Dew point57°

See detailed hourly forecast

Fri, 0987° / 54°

87 °

Belleville, Friday, 9 October

Clear. High 87°, low 54°.

Pressure30.12 inHg

Wind7.2 mph S

Humidity26%

Visibility6.2 mi

Dew point44°

Sat, 1085° / 63°

0.06

85 °

Belleville, Saturday, 10 October

Light rain. High 85°, low 63°.

Pressure30.09 inHg

Wind5.1 mph SE

Humidity38%

Visibility6.2 mi

Dew point54°

Sun, 1173° / 61°

0.09

73 °

Belleville, Sunday, 11 October

Light rain. High 73°, low 61°.

Pressure29.94 inHg

Wind5.7 mph N

Humidity70%

Visibility6.2 mi

Dew point58°

Mon, 1291° / 59°

91 °

Belleville, Monday, 12 October

Clear. High 91°, low 59°.

Pressure29.88 inHg

Wind11.1 mph S

Humidity35%

Visibility—

Dew point53°

Tue, 1376° / 59°

76 °

Belleville, Tuesday, 13 October

Partly cloudy. High 76°, low 59°.

Pressure30.00 inHg

Wind11.9 mph N

Humidity45%

Visibility—

Dew point49°

Wed, 1475° / 53°

75 °

Belleville, Wednesday, 14 October

Overcast. High 75°, low 53°.

Pressure30.03 inHg

Wind11.7 mph SE

Humidity46%

Visibility—

Dew point42°

Thu, 1595° / 68°

95 °

Belleville, Thursday, 15 October

Clear. High 95°, low 68°.

Pressure29.85 inHg

Wind20.5 mph S

Humidity37%

Visibility—

Dew point60°

Fri, 1688° / 62°

0.27

88 °

Belleville, Friday, 16 October

Light rain. High 88°, low 62°.

Pressure29.94 inHg

Wind17 mph SW

Humidity45%

Visibility—

Dew point63°

Sat, 1758° / 50°

0.11

58 °

Belleville, Saturday, 17 October

Light rain. High 58°, low 50°.

Pressure30.24 inHg

Wind12.3 mph NW

Humidity36%

Visibility—

Dew point30°

Sun, 1862° / 42°

62 °

Belleville, Sunday, 18 October

Clear. High 62°, low 42°.

Pressure30.30 inHg

Wind7.7 mph N

Humidity36%

Visibility—

Dew point30°

Mon, 1967° / 43°

67 °

Belleville, Monday, 19 October

Clear. High 67°, low 43°.

Pressure30.30 inHg

Wind5.2 mph SE

Humidity30%

Visibility—

Dew point30°

Tue, 2074° / 48°

74 °

Belleville, Tuesday, 20 October

Overcast. High 74°, low 48°.

Pressure30.15 inHg

Wind9.6 mph N

Humidity25%

Visibility—

Dew point31°

Wed, 2164° / 46°

64 °

Belleville, Wednesday, 21 October

Overcast. High 64°, low 46°.

Pressure30.18 inHg

Wind9.7 mph E

Humidity40%

Visibility—

Dew point36°

Thu, 2260° / 52°

60 °

Belleville, Thursday, 22 October

Overcast. High 60°, low 52°.

Pressure29.77 inHg

Wind9.8 mph S

Humidity56%

Visibility—

Dew point42°

Fri, 2357° / 53°

0.31

57 °

Belleville, Friday, 23 October

Rain. High 57°, low 53°.

Pressure29.83 inHg

Wind10.8 mph S

Humidity89%

Visibility—

Dew point52°

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 Belleville, 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 Belleville, 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.