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As of 19:55 CDT

Weather in Mount Vernon, IL

61°Current weather

Mount Vernon, Sunday, 25 October, 19:55

Overcast. Feels like 60°. High 78°, low 46°.

Pressure30.36 inHg
Wind0.2 mph SE
Humidity67%
Visibility6.2 mi
Dew point50°
Mon, 2675° / 49°0Overcast
75 °Overcast

Mount Vernon, Monday, 26 October

Overcast. High 75°, low 49°.

Pressure30.33 inHg
Wind5.3 mph SW
Humidity45%
Visibility6.2 mi
Dew point49°
Tue, 2771° / 46°0Overcast
71 °Overcast

Mount Vernon, Tuesday, 27 October

Overcast. High 71°, low 46°.

Pressure30.27 inHg
Wind4.4 mph S
Humidity51%
Visibility6.2 mi
Dew point51°
Wed, 2873° / 52°0.06Rain
73 °Rain

Mount Vernon, Wednesday, 28 October

Rain. High 73°, low 52°.

Pressure30.24 inHg
Wind5.2 mph S
Humidity54%
Visibility6.2 mi
Dew point52°
Thu, 2978° / 55°0Clear
78 °Clear

Mount Vernon, Thursday, 29 October

Clear. High 78°, low 55°.

Pressure30.15 inHg
Wind8.8 mph S
Humidity47%
Visibility6.2 mi
Dew point51°
Fri, 3076° / 58°0Overcast
76 °Overcast

Mount Vernon, Friday, 30 October

Overcast. High 76°, low 58°.

Pressure30.15 inHg
Wind5.4 mph SW
Humidity55%
Visibility—
Dew point56°
Sat, 3170° / 60°0.01Light rain
70 °Light rain

Mount Vernon, Saturday, 31 October

Light rain. High 70°, low 60°.

Pressure30.18 inHg
Wind9.3 mph SE
Humidity59%
Visibility—
Dew point54°
Sun, 0163° / 59°0.09Light rain
63 °Light rain

Mount Vernon, Sunday, 1 November

Light rain. High 63°, low 59°.

Pressure30.12 inHg
Wind7.8 mph S
Humidity83%
Visibility—
Dew point56°
Mon, 0266° / 57°0Overcast
66 °Overcast

Mount Vernon, Monday, 2 November

Overcast. High 66°, low 57°.

Pressure30.06 inHg
Wind11.6 mph E
Humidity68%
Visibility—
Dew point54°
Tue, 0370° / 52°0Overcast
70 °Overcast

Mount Vernon, Tuesday, 3 November

Overcast. High 70°, low 52°.

Pressure30.00 inHg
Wind13.1 mph E
Humidity53%
Visibility—
Dew point49°
Wed, 0470° / 51°0Overcast
70 °Overcast

Mount Vernon, Wednesday, 4 November

Overcast. High 70°, low 51°.

Pressure30.03 inHg
Wind9.5 mph E
Humidity45%
Visibility—
Dew point43°
Thu, 0570° / 52°0Overcast
70 °Overcast

Mount Vernon, Thursday, 5 November

Overcast. High 70°, low 52°.

Pressure29.94 inHg
Wind6.4 mph N
Humidity45%
Visibility—
Dew point45°
Fri, 0670° / 57°0Overcast
70 °Overcast

Mount Vernon, Friday, 6 November

Overcast. High 70°, low 57°.

Pressure29.91 inHg
Wind7.2 mph E
Humidity44%
Visibility—
Dew point46°
Sat, 0774° / 54°0Mostly clear
74 °Mostly clear

Mount Vernon, Saturday, 7 November

Mostly clear. High 74°, low 54°.

Pressure29.83 inHg
Wind9.7 mph SW
Humidity35%
Visibility—
Dew point41°
Sun, 0869° / 53°0.01Light rain
69 °Light rain

Mount Vernon, Sunday, 8 November

Light rain. High 69°, low 53°.

Pressure29.80 inHg
Wind14.3 mph W
Humidity31%
Visibility—
Dew point35°
Mon, 0961° / 47°0Clear
61 °Clear

Mount Vernon, Monday, 9 November

Clear. High 61°, low 47°.

Pressure29.65 inHg
Wind22.3 mph W
Humidity22%
Visibility—
Dew point19°

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 Mount Vernon, 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 Mount Vernon, 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.