Weather in Mount Vernon, MO
Mount Vernon, Sunday, 9 August, 06:14
Partly cloudy. Feels like 75°. High 94°, low 74°.
Monthly outlook for Mount Vernon, MO: average high 106.2°, average low 79.4°. That is 10.6° above the climate normal for August. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 21 August (114°), the coolest 17 August (73.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 104° | 87.1° | +9.4° |
| 19 August – 28 August | 110° | 87.3° | +12.6° |
| 29 August – 7 September | at normal | 84.5° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Miller (8 mi).
0
Mount Vernon, Monday, 10 August
Clear. High 103°, low 74°.
0Mount Vernon, Tuesday, 11 August
Clear. High 104°, low 78°.
0.01
Mount Vernon, Wednesday, 12 August
Light rain. High 104°, low 78°.
0
Mount Vernon, Thursday, 13 August
Overcast. High 105°, low 82°.
0
Mount Vernon, Friday, 14 August
Mostly clear. High 107°, low 83°.
0Mount Vernon, Saturday, 15 August
Overcast. High 107°, low 82°.
0.28Mount Vernon, Sunday, 16 August
Rain. High 107°, low 76°.
0.01Mount Vernon, Monday, 17 August
Light rain. High 105°, low 74°.
0Mount Vernon, Tuesday, 18 August
Overcast. High 105°, low 77°.
0Mount Vernon, Wednesday, 19 August
Mostly clear. High 112°, low 86°.
0Mount Vernon, Thursday, 20 August
Clear. High 112°, low 85°.
0Mount Vernon, Friday, 21 August
Clear. High 114°, low 84°.
0Mount Vernon, Saturday, 22 August
Overcast. High 110°, low 83°.
0.02Mount Vernon, Sunday, 23 August
Light rain. High 107°, low 75°.
0Mount Vernon, Monday, 24 August
Light rain. High 105°, low 80°.
0.08
Mount Vernon, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09Mount Vernon, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12
Mount Vernon, Thursday, 27 August
Climate normal for this date — 60-year average.
0.09Mount Vernon, Friday, 28 August
Climate normal for this date — 60-year average.
0.09Mount Vernon, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Mount Vernon, Sunday, 30 August
Climate normal for this date — 60-year average.
0.12Mount Vernon, Monday, 31 August
Climate normal for this date — 60-year average.
0.11Mount Vernon, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.14Mount Vernon, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Mount Vernon, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Mount Vernon, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Mount Vernon, Saturday, 5 September
Climate normal for this date — 60-year average.
0.06Mount Vernon, Sunday, 6 September
Climate normal for this date — 60-year average.
0.12Mount Vernon, Monday, 7 September
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, MO 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, MO 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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