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As of 05:14 CDT

Weather in Monticello, IL

70°Current weather

Monticello, Sunday, 9 August, 05:14

Mostly clear. Feels like 71°. High 91°, low 69°.

Pressure30.00 inHg
Wind5.3 mph SW
Humidity93%
Visibility6.2 mi
Dew point68°
Mon, 1096° / 76°0Partly cloudy
96 °Partly cloudy

Monticello, Monday, 10 August

Partly cloudy. High 96°, low 76°.

Pressure29.91 inHg
Wind12.9 mph SW
Humidity64%
Visibility6.2 mi
Dew point74°
Tue, 1192° / 68°0.11Light rain
92 °Light rain

Monticello, Tuesday, 11 August

Light rain. High 92°, low 68°.

Pressure29.85 inHg
Wind14.2 mph SW
Humidity65%
Visibility6.2 mi
Dew point73°
Wed, 1281° / 70°0.15Rain
81 °Rain

Monticello, Wednesday, 12 August

Rain. High 81°, low 70°.

Pressure29.83 inHg
Wind6.6 mph NW
Humidity85%
Visibility6.2 mi
Dew point76°
Thu, 1382° / 66°0Overcast
82 °Overcast

Monticello, Thursday, 13 August

Overcast. High 82°, low 66°.

Pressure29.97 inHg
Wind14 mph NE
Humidity60%
Visibility—
Dew point65°
Fri, 1469° / 61°0.91Heavy rain
69 °Heavy rain

Monticello, Friday, 14 August

Heavy rain. High 69°, low 61°.

Pressure30.15 inHg
Wind12.4 mph E
Humidity92%
Visibility—
Dew point62°
Sat, 1575° / 62°0.09Light rain
75 °Light rain

Monticello, Saturday, 15 August

Light rain. High 75°, low 62°.

Pressure30.21 inHg
Wind12.4 mph SE
Humidity79%
Visibility—
Dew point64°
Sun, 1680° / 62°0.19Rain
80 °Rain

Monticello, Sunday, 16 August

Rain. High 80°, low 62°.

Pressure30.06 inHg
Wind7.4 mph E
Humidity77%
Visibility—
Dew point68°
Mon, 1781° / 66°0Partly cloudy
81 °Partly cloudy

Monticello, Monday, 17 August

Partly cloudy. High 81°, low 66°.

Pressure30.09 inHg
Wind6.5 mph N
Humidity65%
Visibility—
Dew point65°
Tue, 1883° / 66°0Clear
83 °Clear

Monticello, Tuesday, 18 August

Clear. High 83°, low 66°.

Pressure30.03 inHg
Wind8 mph SE
Humidity62%
Visibility—
Dew point65°
Wed, 1990° / 69°0Overcast
90 °Overcast

Monticello, Wednesday, 19 August

Overcast. High 90°, low 69°.

Pressure29.91 inHg
Wind16.3 mph S
Humidity64%
Visibility—
Dew point71°
Thu, 20103° / 73°0Partly cloudy
103 °Partly cloudy

Monticello, Thursday, 20 August

Partly cloudy. High 103°, low 73°.

Pressure29.80 inHg
Wind10.2 mph SW
Humidity47%
Visibility—
Dew point69°
Fri, 2191° / 75°0Partly cloudy
91 °Partly cloudy

Monticello, Friday, 21 August

Partly cloudy. High 91°, low 75°.

Pressure29.88 inHg
Wind10.4 mph NE
Humidity65%
Visibility—
Dew point74°
Sat, 22101° / 74°0Clear
101 °Clear

Monticello, Saturday, 22 August

Clear. High 101°, low 74°.

Pressure29.85 inHg
Wind10.2 mph SE
Humidity49%
Visibility—
Dew point71°
Sun, 2398° / 83°0Overcast
98 °Overcast

Monticello, Sunday, 23 August

Overcast. High 98°, low 83°.

Pressure29.85 inHg
Wind16.9 mph W
Humidity47%
Visibility—
Dew point70°
Mon, 2486° / 70°0.13Light rain
86 °Light rain

Monticello, Monday, 24 August

Light rain. High 86°, low 70°.

Pressure30.03 inHg
Wind14.2 mph N
Humidity79%
Visibility—
Dew point72°

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.