Weather in Mount Vernon, IL
Mount Vernon, Monday, 26 October, 11:19
Overcast. Feels like 68°. High 74°, low 49°.
0Mount Vernon, Tuesday, 27 October
Overcast. High 74°, low 47°.
0
Mount Vernon, Wednesday, 28 October
Clear. High 74°, low 48°.
0Mount Vernon, Thursday, 29 October
Clear. High 78°, low 55°.
0Mount Vernon, Friday, 30 October
Overcast. High 78°, low 57°.
0
Mount Vernon, Saturday, 31 October
Light rain. High 72°, low 59°.
0.21Mount Vernon, Sunday, 1 November
Light rain. High 64°, low 61°.
0Mount Vernon, Monday, 2 November
Overcast. High 72°, low 58°.
0.13Mount Vernon, Tuesday, 3 November
Light rain. High 66°, low 52°.
0Mount Vernon, Wednesday, 4 November
Overcast. High 63°, low 44°.
0.04Mount Vernon, Thursday, 5 November
Light rain. High 73°, low 54°.
0.23Mount Vernon, Friday, 6 November
Light rain. High 71°, low 56°.
0
Mount Vernon, Saturday, 7 November
Mostly clear. High 56°, low 43°.
0Mount Vernon, Sunday, 8 November
Clear. High 61°, low 39°.
0Mount Vernon, Monday, 9 November
Clear. High 66°, low 45°.
0Mount Vernon, Tuesday, 10 November
Overcast. High 67°, low 47°.
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.
Sun and moon today
Weather history
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