Weather in Mount Vernon, IA
Mount Vernon, Wednesday, 21 October, 11:18
Clear. Feels like 61°. High 71°, low 45°.
Monthly outlook for Mount Vernon, IA: average high 62.2°, average low 49.3°. That is 3.6° above the climate normal for October. Precipitation is expected on 7 days (about 4.3 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 22 October (74.4°), the coolest 30 October (40.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 66.2° | 57.2° | +5° |
| 31 October – 9 November | 55.5° | 52.2° | +1.8° |
| 10 November – 19 November | at normal | 47° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Morley (11 mi).
0Mount Vernon, Thursday, 22 October
Clear. High 74°, low 49°.
0Mount Vernon, Friday, 23 October
Clear. High 71°, low 53°.
0
Mount Vernon, Saturday, 24 October
Overcast. High 69°, low 53°.
0Mount Vernon, Sunday, 25 October
Overcast. High 72°, low 53°.
0.04
Mount Vernon, Monday, 26 October
Light rain. High 70°, low 54°.
0.03Mount Vernon, Tuesday, 27 October
Light rain. High 55°, low 50°.
0.01Mount Vernon, Wednesday, 28 October
Light rain. High 66°, low 51°.
0.06Mount Vernon, Thursday, 29 October
Light rain. High 58°, low 44°.
0Mount Vernon, Friday, 30 October
Overcast. High 55°, low 41°.
1.76Mount Vernon, Saturday, 31 October
Heavy rain. High 61°, low 48°.
1.08Mount Vernon, Sunday, 1 November
Rain. High 60°, low 54°.
0.13Mount Vernon, Monday, 2 November
Light rain. High 54°, low 51°.
0.31Mount Vernon, Tuesday, 3 November
Rain. High 50°, low 48°.
0.7Mount Vernon, Wednesday, 4 November
Rain. High 54°, low 49°.
0.14Mount Vernon, Thursday, 5 November
Light rain. High 54°, low 47°.
0.06
Mount Vernon, Friday, 6 November
Climate normal for this date — 60-year average.
0.02
Mount 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.
0.11Mount Vernon, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.08Mount Vernon, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Thursday, 19 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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