As of 05:15 CDT

Weather in Monticello, IL

64°

Monticello, Thursday, 15 October, 05:15

Overcast. Feels like 64°. High 76°, low 64°.

Pressure30.06 inHg

Wind6 mph E

Humidity85%

Visibility6.2 mi

Dew point60°

See detailed hourly forecast

Fri, 1664° / 49°

0.15

64 °

Monticello, Friday, 16 October

Rain. High 64°, low 49°.

Pressure30.09 inHg

Wind17.9 mph NW

Humidity52%

Visibility6.2 mi

Dew point38°

Sat, 1757° / 40°

57 °

Monticello, Saturday, 17 October

Clear. High 57°, low 40°.

Pressure30.56 inHg

Wind2.9 mph N

Humidity47%

Visibility6.2 mi

Dew point34°

Sun, 1863° / 41°

63 °

Monticello, Sunday, 18 October

Clear. High 63°, low 41°.

Pressure30.50 inHg

Wind9.3 mph S

Humidity37%

Visibility6.2 mi

Dew point32°

Mon, 1966° / 41°

66 °

Monticello, Monday, 19 October

Partly cloudy. High 66°, low 41°.

Pressure30.39 inHg

Wind4.5 mph S

Humidity37%

Visibility—

Dew point35°

Tue, 2069° / 46°

69 °

Monticello, Tuesday, 20 October

Clear. High 69°, low 46°.

Pressure30.30 inHg

Wind5.1 mph E

Humidity38%

Visibility—

Dew point38°

Wed, 2171° / 52°

71 °

Monticello, Wednesday, 21 October

Clear. High 71°, low 52°.

Pressure30.33 inHg

Wind7.1 mph E

Humidity32%

Visibility—

Dew point36°

Thu, 2271° / 51°

71 °

Monticello, Thursday, 22 October

Overcast. High 71°, low 51°.

Pressure30.27 inHg

Wind7.2 mph E

Humidity35%

Visibility—

Dew point38°

Fri, 2375° / 52°

75 °

Monticello, Friday, 23 October

Overcast. High 75°, low 52°.

Pressure30.15 inHg

Wind13.9 mph S

Humidity36%

Visibility—

Dew point42°

Sat, 2462° / 56°

0.52

62 °

Monticello, Saturday, 24 October

Rain. High 62°, low 56°.

Pressure30.18 inHg

Wind11.9 mph S

Humidity62%

Visibility—

Dew point46°

Sun, 2563° / 46°

0.23

63 °

Monticello, Sunday, 25 October

Light rain. High 63°, low 46°.

Pressure30.18 inHg

Wind16.3 mph NW

Humidity53%

Visibility—

Dew point41°

Mon, 2654° / 39°

54 °

Monticello, Monday, 26 October

Clear. High 54°, low 39°.

Pressure30.36 inHg

Wind10.7 mph NW

Humidity31%

Visibility—

Dew point21°

Tue, 2746° / 39°

46 °

Monticello, Tuesday, 27 October

Light rain. High 46°, low 39°.

Pressure30.30 inHg

Wind8 mph NW

Humidity71%

Visibility—

Dew point37°

Wed, 2858° / 36°

58 °

Monticello, Wednesday, 28 October

Clear. High 58°, low 36°.

Pressure30.15 inHg

Wind15.1 mph SW

Humidity43%

Visibility—

Dew point31°

Thu, 2962° / 47°

62 °

Monticello, Thursday, 29 October

Partly cloudy. High 62°, low 47°.

Pressure30.03 inHg

Wind10.7 mph SW

Humidity46%

Visibility—

Dew point39°

Fri, 3045° / 37°

45 °

Monticello, Friday, 30 October

Clear. High 45°, low 37°.

Pressure30.47 inHg

Wind17.8 mph N

Humidity32%

Visibility—

Dew point15°

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.