As of 10:09 CDT

Weather in Boulder, IL

77°

Boulder, Friday, 9 October, 10:09

Clear. Feels like 76°. High 86°, low 53°.

Pressure30.15 inHg

Wind6.3 mph S

Humidity49%

Visibility6.2 mi

Dew point56°

See detailed hourly forecast

Sat, 1077° / 56°

77 °

Boulder, Saturday, 10 October

Overcast. High 77°, low 56°.

Pressure30.06 inHg

Wind6.2 mph E

Humidity53%

Visibility6.2 mi

Dew point54°

Sun, 1181° / 56°

81 °

Boulder, Sunday, 11 October

Clear. High 81°, low 56°.

Pressure29.94 inHg

Wind5.8 mph NW

Humidity56%

Visibility6.2 mi

Dew point58°

Mon, 1288° / 65°

88 °

Boulder, Monday, 12 October

Clear. High 88°, low 65°.

Pressure29.91 inHg

Wind10.2 mph SW

Humidity48%

Visibility6.2 mi

Dew point61°

Tue, 1388° / 71°

88 °

Boulder, Tuesday, 13 October

Overcast. High 88°, low 71°.

Pressure29.85 inHg

Wind11.5 mph SW

Humidity55%

Visibility—

Dew point66°

Wed, 1475° / 69°

0.36

75 °

Boulder, Wednesday, 14 October

Rain. High 75°, low 69°.

Pressure29.97 inHg

Wind9 mph NE

Humidity85%

Visibility—

Dew point68°

Thu, 1580° / 58°

0.39

80 °

Boulder, Thursday, 15 October

Rain. High 80°, low 58°.

Pressure29.97 inHg

Wind12.2 mph S

Humidity64%

Visibility—

Dew point56°

Fri, 1679° / 50°

0.04

79 °

Boulder, Friday, 16 October

Light rain. High 79°, low 50°.

Pressure30.03 inHg

Wind22.5 mph W

Humidity30%

Visibility—

Dew point32°

Sat, 1751° / 40°

51 °

Boulder, Saturday, 17 October

Clear. High 51°, low 40°.

Pressure30.42 inHg

Wind19.6 mph NW

Humidity35%

Visibility—

Dew point22°

Sun, 1860° / 34°

60 °

Boulder, Sunday, 18 October

Clear. High 60°, low 34°.

Pressure30.36 inHg

Wind8.1 mph S

Humidity26%

Visibility—

Dew point19°

Mon, 1969° / 42°

69 °

Boulder, Monday, 19 October

Overcast. High 69°, low 42°.

Pressure30.27 inHg

Wind10.4 mph SW

Humidity20%

Visibility—

Dew point20°

Tue, 2074° / 46°

74 °

Boulder, Tuesday, 20 October

Clear. High 74°, low 46°.

Pressure30.33 inHg

Wind8.1 mph SE

Humidity21%

Visibility—

Dew point26°

Wed, 2177° / 53°

77 °

Boulder, Wednesday, 21 October

Overcast. High 77°, low 53°.

Pressure30.24 inHg

Wind12.3 mph S

Humidity25%

Visibility—

Dew point34°

Thu, 2277° / 53°

0.02

77 °

Boulder, Thursday, 22 October

Light rain. High 77°, low 53°.

Pressure30.03 inHg

Wind15.3 mph SW

Humidity32%

Visibility—

Dew point41°

Fri, 2364° / 45°

0.03

64 °

Boulder, Friday, 23 October

Light rain. High 64°, low 45°.

Pressure30.09 inHg

Wind17.7 mph NW

Humidity39%

Visibility—

Dew point32°

Sat, 2452° / 36°

52 °

Boulder, Saturday, 24 October

Clear. High 52°, low 36°.

Pressure30.21 inHg

Wind14 mph NW

Humidity38%

Visibility—

Dew point24°

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 Boulder, 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 Boulder, 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.