Weather in Mount Vernon, MD
Mount Vernon, Saturday, 8 August, 19:45
Partly cloudy. Feels like 93°. High 90°, low 74°.
Monthly outlook for Mount Vernon, MD: average high 84.1°, average low 68.8°. That is 0.3° above the climate normal for August. Precipitation is expected on 6 days (about 1.7 inches), against a normal of 7 days and 2.6 inches. The warmest day looks like 10 August (95.6°), the coolest 15 August (59.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 85.8° | 84.3° | +0.8° |
| 18 August – 27 August | 81.3° | 82.9° | -0.9° |
| 28 August – 6 September | at normal | 82.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Salisbury (14 mi).
0
Mount Vernon, Sunday, 9 August
Overcast. High 91°, low 74°.
0Mount Vernon, Monday, 10 August
Overcast. High 96°, low 77°.
0.01
Mount Vernon, Tuesday, 11 August
Light rain. High 91°, low 72°.
0.02Mount Vernon, Wednesday, 12 August
Light rain. High 88°, low 73°.
0.06Mount Vernon, Thursday, 13 August
Light rain. High 92°, low 74°.
0.64Mount Vernon, Friday, 14 August
Rain. High 70°, low 63°.
0
Mount Vernon, Saturday, 15 August
Clear. High 77°, low 60°.
0Mount Vernon, Sunday, 16 August
Clear. High 80°, low 60°.
0
Mount Vernon, Monday, 17 August
Mostly clear. High 82°, low 65°.
0.3Mount Vernon, Tuesday, 18 August
Rain. High 78°, low 71°.
0.13Mount Vernon, Wednesday, 19 August
Light rain. High 87°, low 72°.
0Mount Vernon, Thursday, 20 August
Overcast. High 85°, low 66°.
0.4Mount Vernon, Friday, 21 August
Rain. High 77°, low 70°.
0.01Mount Vernon, Saturday, 22 August
Light rain. High 87°, low 71°.
0Mount Vernon, Sunday, 23 August
Overcast. High 74°, low 60°.
0.08Mount Vernon, Monday, 24 August
Climate normal for this date — 60-year average.
0.06Mount Vernon, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06Mount Vernon, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14Mount Vernon, Thursday, 27 August
Climate normal for this date — 60-year average.
0.2
Mount Vernon, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Mount Vernon, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08Mount Vernon, Sunday, 30 August
Climate normal for this date — 60-year average.
0.08Mount Vernon, Monday, 31 August
Climate normal for this date — 60-year average.
0.26Mount Vernon, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.11Mount Vernon, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Mount 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.
0.09Mount Vernon, Saturday, 5 September
Climate normal for this date — 60-year average.
0.18Mount Vernon, Sunday, 6 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, MD 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, MD 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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