Weather in Mount Vernon, IA
Mount Vernon, Sunday, 18 October, 23:03
Clear. Feels like 51°. High 66°, low 40°.
Monthly outlook for Mount Vernon, IA: average high 61.8°, average low 45.2°. That is 2.7° above the climate normal for October. Precipitation is expected on 5 days (about 1.8 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (69.8°), the coolest 1 November (37.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 64.4° | 58.2° | +3.5° |
| 28 October – 6 November | 57.4° | 53.7° | +2° |
| 7 November – 16 November | at normal | 48.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Morley (11 mi).
0
Mount Vernon, Monday, 19 October
Overcast. High 66°, low 41°.
0
Mount Vernon, Tuesday, 20 October
Clear. High 66°, low 41°.
0Mount Vernon, Wednesday, 21 October
Clear. High 69°, low 46°.
0Mount Vernon, Thursday, 22 October
Clear. High 70°, low 48°.
0Mount Vernon, Friday, 23 October
Overcast. High 66°, low 50°.
0Mount Vernon, Saturday, 24 October
Overcast. High 69°, low 50°.
0.03
Mount Vernon, Sunday, 25 October
Light rain. High 60°, low 45°.
0.51Mount Vernon, Monday, 26 October
Rain. High 60°, low 44°.
0.33Mount Vernon, Tuesday, 27 October
Rain. High 53°, low 44°.
0.1Mount Vernon, Wednesday, 28 October
Light rain. High 53°, low 46°.
0.01Mount Vernon, Thursday, 29 October
Light rain. High 60°, low 53°.
0.05Mount Vernon, Friday, 30 October
Light rain. High 64°, low 53°.
0
Mount Vernon, Saturday, 31 October
Partly cloudy. High 58°, low 44°.
0.75Mount Vernon, Sunday, 1 November
Rain. High 54°, low 38°.
0Mount Vernon, Monday, 2 November
Clear. High 56°, low 38°.
0.06
Mount Vernon, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.1Mount Vernon, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.09Mount Vernon, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Mount Vernon, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Mount Vernon, Sunday, 8 November
Climate normal for this date — 60-year average.
0.09
Mount Vernon, Monday, 9 November
Climate normal for this date — 60-year average.
0.1Mount Vernon, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Mount Vernon, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Friday, 13 November
Climate normal for this date — 60-year average.
0.04Mount Vernon, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Monday, 16 November
Climate normal for this date — 60-year average.
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, IA 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, IA 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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