Weather in Mount Vernon, IA
Mount Vernon, Thursday, 29 October, 14:57
Clear. Feels like 64°. High 66°, low 51°.
Monthly outlook for Mount Vernon, IA: average high 57.5°, average low 47.1°. That is 3.4° above the climate normal for October. Precipitation is expected on 10 days (about 2.6 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 29 October (65.7°), the coolest 7 November (33.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 29 October – 7 November | 59.8° | 53.3° | +3.6° |
| 8 November – 17 November | 53.8° | 47.7° | +3.3° |
| 18 November – 27 November | at normal | 43.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Morley (11 mi).
0.44
Mount Vernon, Friday, 30 October
Heavy rain. High 58°, low 46°.
0.31Mount Vernon, Saturday, 31 October
Rain. High 65°, low 52°.
0.08Mount Vernon, Sunday, 1 November
Light rain. High 65°, low 53°.
0.07Mount Vernon, Monday, 2 November
Light rain. High 65°, low 58°.
0.58Mount Vernon, Tuesday, 3 November
Rain. High 65°, low 59°.
0.64Mount Vernon, Wednesday, 4 November
Rain. High 61°, low 57°.
0.05Mount Vernon, Thursday, 5 November
Light rain. High 58°, low 50°.
0.1Mount Vernon, Friday, 6 November
Light rain. High 48°, low 38°.
0
Mount Vernon, Saturday, 7 November
Overcast. High 47°, low 34°.
0Mount Vernon, Sunday, 8 November
Overcast. High 47°, low 36°.
0Mount Vernon, Monday, 9 November
Overcast. High 48°, low 42°.
0
Mount Vernon, Tuesday, 10 November
Mostly clear. High 52°, low 38°.
0Mount Vernon, Wednesday, 11 November
Clear. High 57°, low 42°.
0Mount Vernon, Thursday, 12 November
Overcast. High 59°, low 46°.
0.14Mount Vernon, Friday, 13 November
Light rain. High 59°, low 52°.
0.04
Mount 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.
0.11Mount Vernon, Friday, 20 November
Climate normal for this date — 60-year average.
0.09Mount Vernon, Saturday, 21 November
Climate normal for this date — 60-year average.
0.03Mount Vernon, Sunday, 22 November
Climate normal for this date — 60-year average.
0.1Mount Vernon, Monday, 23 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.06Mount Vernon, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.09
Mount Vernon, Thursday, 26 November
Climate normal for this date — 60-year average.
0.12Mount Vernon, Friday, 27 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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