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As of 00:23 CDT

Weather in Mount Vernon, IL

46°Current weather

Mount Vernon, Tuesday, 27 October, 00:23

Clear. Feels like 46°. High 75°, low 46°.

Pressure30.27 inHg
Wind0 mph N
Humidity100%
Visibility6.2 mi
Dew point47°
Wed, 2878° / 47°0Clear
78 °Clear

Mount Vernon, Wednesday, 28 October

Clear. High 78°, low 47°.

Pressure30.24 inHg
Wind7 mph S
Humidity42%
Visibility6.2 mi
Dew point49°
Thu, 2979° / 55°0Clear
79 °Clear

Mount Vernon, Thursday, 29 October

Clear. High 79°, low 55°.

Pressure30.15 inHg
Wind8.1 mph SW
Humidity44%
Visibility6.2 mi
Dew point51°
Fri, 3078° / 56°0Overcast
78 °Overcast

Mount Vernon, Friday, 30 October

Overcast. High 78°, low 56°.

Pressure30.18 inHg
Wind4 mph SE
Humidity56%
Visibility6.2 mi
Dew point56°
Sat, 3170° / 61°0Light rain
70 °Light rain

Mount Vernon, Saturday, 31 October

Light rain. High 70°, low 61°.

Pressure30.12 inHg
Wind6.2 mph SE
Humidity60%
Visibility—
Dew point54°
Sun, 0173° / 59°0.8Rain
73 °Rain

Mount Vernon, Sunday, 1 November

Rain. High 73°, low 59°.

Pressure29.91 inHg
Wind7.7 mph W
Humidity80%
Visibility—
Dew point60°
Mon, 0272° / 56°0.15Light rain
72 °Light rain

Mount Vernon, Monday, 2 November

Light rain. High 72°, low 56°.

Pressure29.80 inHg
Wind14 mph SE
Humidity50%
Visibility—
Dew point50°
Tue, 0372° / 62°0.5Rain
72 °Rain

Mount Vernon, Tuesday, 3 November

Rain. High 72°, low 62°.

Pressure29.80 inHg
Wind16.5 mph SE
Humidity89%
Visibility—
Dew point63°
Wed, 0464° / 54°1.59Heavy rain
64 °Heavy rain

Mount Vernon, Wednesday, 4 November

Heavy rain. High 64°, low 54°.

Pressure29.68 inHg
Wind18.7 mph W
Humidity54%
Visibility—
Dew point43°
Thu, 0552° / 42°0.05Light rain
52 °Light rain

Mount Vernon, Thursday, 5 November

Light rain. High 52°, low 42°.

Pressure29.77 inHg
Wind21.3 mph W
Humidity62%
Visibility—
Dew point33°
Fri, 0643° / 34°0.01Light snow
43 °Light snow

Mount Vernon, Friday, 6 November

Light snow. High 43°, low 34°.

Pressure29.97 inHg
Wind20.4 mph NW
Humidity45%
Visibility—
Dew point21°
Sat, 0746° / 31°0Clear
46 °Clear

Mount Vernon, Saturday, 7 November

Clear. High 46°, low 31°.

Pressure30.15 inHg
Wind11.9 mph NW
Humidity39%
Visibility—
Dew point19°
Sun, 0854° / 32°0Overcast
54 °Overcast

Mount Vernon, Sunday, 8 November

Overcast. High 54°, low 32°.

Pressure30.15 inHg
Wind12.2 mph S
Humidity32%
Visibility—
Dew point20°
Mon, 0953° / 46°0.7Rain
53 °Rain

Mount Vernon, Monday, 9 November

Rain. High 53°, low 46°.

Pressure29.74 inHg
Wind17.6 mph SW
Humidity82%
Visibility—
Dew point45°
Tue, 1062° / 46°0Mostly clear
62 °Mostly clear

Mount Vernon, Tuesday, 10 November

Mostly clear. High 62°, low 46°.

Pressure29.80 inHg
Wind9.4 mph W
Humidity56%
Visibility—
Dew point43°
Wed, 1151° / 42°0.12Light rain
51 °Light rain

Mount Vernon, Wednesday, 11 November

Light rain. High 51°, low 42°.

Pressure29.91 inHg
Wind14.1 mph N
Humidity87%
Visibility—
Dew point39°

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.