As of 20:54 CDT

Weather in Monticello, IL

71°

Monticello, Thursday, 15 October, 20:54

Overcast. Feels like 72°. High 71°, low 62°.

Pressure29.85 inHg

Wind14.3 mph W

Humidity89%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

Fri, 1668° / 50°

0.06

68 °

Monticello, Friday, 16 October

Light rain. High 68°, low 50°.

Pressure30.12 inHg

Wind17 mph NW

Humidity50%

Visibility6.2 mi

Dew point37°

Sat, 1757° / 40°

57 °

Monticello, Saturday, 17 October

Clear. High 57°, low 40°.

Pressure30.56 inHg

Wind2 mph N

Humidity48%

Visibility6.2 mi

Dew point34°

Sun, 1863° / 41°

63 °

Monticello, Sunday, 18 October

Clear. High 63°, low 41°.

Pressure30.50 inHg

Wind9.6 mph S

Humidity36%

Visibility6.2 mi

Dew point31°

Mon, 1967° / 41°

67 °

Monticello, Monday, 19 October

Clear. High 67°, low 41°.

Pressure30.39 inHg

Wind5.5 mph S

Humidity44%

Visibility6.2 mi

Dew point39°

Tue, 2070° / 44°

0.01

70 °

Monticello, Tuesday, 20 October

Light rain. High 70°, low 44°.

Pressure30.33 inHg

Wind4.3 mph S

Humidity35%

Visibility—

Dew point37°

Wed, 2172° / 49°

72 °

Monticello, Wednesday, 21 October

Overcast. High 72°, low 49°.

Pressure30.30 inHg

Wind5.8 mph E

Humidity33%

Visibility—

Dew point37°

Thu, 2276° / 53°

76 °

Monticello, Thursday, 22 October

Mostly clear. High 76°, low 53°.

Pressure30.24 inHg

Wind6.3 mph SE

Humidity26%

Visibility—

Dew point34°

Fri, 2377° / 54°

77 °

Monticello, Friday, 23 October

Clear. High 77°, low 54°.

Pressure30.18 inHg

Wind9.5 mph SE

Humidity26%

Visibility—

Dew point35°

Sat, 2474° / 56°

74 °

Monticello, Saturday, 24 October

Overcast. High 74°, low 56°.

Pressure30.21 inHg

Wind9.3 mph SE

Humidity32%

Visibility—

Dew point38°

Sun, 2574° / 55°

74 °

Monticello, Sunday, 25 October

Overcast. High 74°, low 55°.

Pressure30.24 inHg

Wind7.4 mph E

Humidity29%

Visibility—

Dew point37°

Mon, 2672° / 56°

72 °

Monticello, Monday, 26 October

Overcast. High 72°, low 56°.

Pressure30.03 inHg

Wind12.3 mph SE

Humidity34%

Visibility—

Dew point37°

Tue, 2766° / 49°

66 °

Monticello, Tuesday, 27 October

Clear. High 66°, low 49°.

Pressure30.03 inHg

Wind11.3 mph W

Humidity42%

Visibility—

Dew point38°

Wed, 2863° / 50°

0.69

63 °

Monticello, Wednesday, 28 October

Rain. High 63°, low 50°.

Pressure29.62 inHg

Wind21.2 mph S

Humidity88%

Visibility—

Dew point58°

Thu, 2959° / 48°

0.1

59 °

Monticello, Thursday, 29 October

Light rain. High 59°, low 48°.

Pressure29.91 inHg

Wind23.6 mph W

Humidity67%

Visibility—

Dew point45°

Fri, 3064° / 47°

64 °

Monticello, Friday, 30 October

Partly cloudy. High 64°, low 47°.

Pressure30.06 inHg

Wind10.3 mph NW

Humidity38%

Visibility—

Dew point35°

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 Monticello, 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 Monticello, 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.