As of 10:20 CDT

Weather in Monticello, IL

56°

Monticello, Monday, 19 October, 10:20

Clear. Feels like 54°. High 67°, low 39°.

Pressure30.42 inHg

Wind2.6 mph S

Humidity64%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

Tue, 2070° / 40°

70 °

Monticello, Tuesday, 20 October

Clear. High 70°, low 40°.

Pressure30.39 inHg

Wind2.6 mph SE

Humidity43%

Visibility6.2 mi

Dew point42°

Wed, 2170° / 43°

70 °

Monticello, Wednesday, 21 October

Clear. High 70°, low 43°.

Pressure30.30 inHg

Wind1.8 mph SW

Humidity44%

Visibility6.2 mi

Dew point45°

Thu, 2269° / 48°

69 °

Monticello, Thursday, 22 October

Clear. High 69°, low 48°.

Pressure30.30 inHg

Wind4.9 mph NE

Humidity51%

Visibility6.2 mi

Dew point49°

Fri, 2366° / 47°

66 °

Monticello, Friday, 23 October

Clear. High 66°, low 47°.

Pressure30.33 inHg

Wind7.6 mph E

Humidity48%

Visibility—

Dew point42°

Sat, 2467° / 45°

67 °

Monticello, Saturday, 24 October

Clear. High 67°, low 45°.

Pressure30.39 inHg

Wind7.4 mph SE

Humidity39%

Visibility—

Dew point37°

Sun, 2576° / 53°

76 °

Monticello, Sunday, 25 October

Overcast. High 76°, low 53°.

Pressure30.30 inHg

Wind12.3 mph SW

Humidity32%

Visibility—

Dew point41°

Mon, 2671° / 58°

71 °

Monticello, Monday, 26 October

Overcast. High 71°, low 58°.

Pressure30.21 inHg

Wind9.4 mph S

Humidity37%

Visibility—

Dew point41°

Tue, 2764° / 46°

0.11

64 °

Monticello, Tuesday, 27 October

Light rain. High 64°, low 46°.

Pressure29.97 inHg

Wind17.5 mph NW

Humidity47%

Visibility—

Dew point43°

Wed, 2843° / 33°

0.03

43 °

Monticello, Wednesday, 28 October

Light rain. High 43°, low 33°.

Pressure30.33 inHg

Wind18.6 mph NW

Humidity33%

Visibility—

Dew point14°

Thu, 2952° / 30°

52 °

Monticello, Thursday, 29 October

Clear. High 52°, low 30°.

Pressure30.27 inHg

Wind8.7 mph W

Humidity24%

Visibility—

Dew point12°

Fri, 3052° / 38°

52 °

Monticello, Friday, 30 October

Overcast. High 52°, low 38°.

Pressure30.03 inHg

Wind12.7 mph S

Humidity26%

Visibility—

Dew point14°

Sat, 3150° / 46°

0.03

50 °

Monticello, Saturday, 31 October

Light rain. High 50°, low 46°.

Pressure30.12 inHg

Wind12.9 mph S

Humidity74%

Visibility—

Dew point42°

Sun, 0161° / 45°

0.3

61 °

Monticello, Sunday, 1 November

Rain. High 61°, low 45°.

Pressure29.97 inHg

Wind19.8 mph NW

Humidity71%

Visibility—

Dew point46°

Mon, 0249° / 40°

49 °

Monticello, Monday, 2 November

Partly cloudy. High 49°, low 40°.

Pressure30.15 inHg

Wind18 mph NW

Humidity53%

Visibility—

Dew point30°

Tue, 0349° / 37°

49 °

Monticello, Tuesday, 3 November

Overcast. High 49°, low 37°.

Pressure30.00 inHg

Wind7.1 mph N

Humidity63%

Visibility—

Dew point34°

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.