Weather in Mount Vernon, VA
Mount Vernon, Saturday, 8 August, 19:45
Overcast. Feels like 91°. High 90°, low 73°.
Monthly outlook for Mount Vernon, VA: average high 84.9°, average low 68.1°. That is 0.1° above the climate normal for August. Precipitation is expected on 5 days (about 2.3 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 10 August (95.5°), the coolest 15 August (59.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 87.4° | 85.4° | +1.1° |
| 18 August – 27 August | 80.6° | 83.8° | -1.7° |
| 28 August – 6 September | at normal | 83° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Hybla Valley (3 mi).
0Mount Vernon, Sunday, 9 August
Overcast. High 91°, low 73°.
0.02
Mount Vernon, Monday, 10 August
Light rain. High 96°, low 74°.
0.05Mount Vernon, Tuesday, 11 August
Light rain. High 93°, low 72°.
0Mount Vernon, Wednesday, 12 August
Overcast. High 92°, low 72°.
0.02Mount Vernon, Thursday, 13 August
Light rain. High 92°, low 75°.
1.16Mount Vernon, Friday, 14 August
Heavy rain. High 73°, low 61°.
0
Mount Vernon, Saturday, 15 August
Clear. High 79°, low 59°.
0Mount Vernon, Sunday, 16 August
Clear. High 81°, low 62°.
0
Mount Vernon, Monday, 17 August
Mostly clear. High 89°, low 63°.
0.33Mount Vernon, Tuesday, 18 August
Rain. High 72°, low 69°.
0.03Mount Vernon, Wednesday, 19 August
Light rain. High 88°, low 70°.
0Mount Vernon, Thursday, 20 August
Overcast. High 86°, low 68°.
0.54Mount Vernon, Friday, 21 August
Rain. High 73°, low 68°.
0Mount Vernon, Saturday, 22 August
Clear. High 87°, low 68°.
0Mount Vernon, Sunday, 23 August
Overcast. High 77°, low 62°.
0.08
Mount Vernon, Monday, 24 August
Climate normal for this date — 60-year average.
0.08Mount Vernon, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.05Mount Vernon, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13
Mount Vernon, Thursday, 27 August
Climate normal for this date — 60-year average.
0.16Mount Vernon, Friday, 28 August
Climate normal for this date — 60-year average.
0.12Mount Vernon, Saturday, 29 August
Climate normal for this date — 60-year average.
0.05Mount Vernon, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Mount Vernon, Monday, 31 August
Climate normal for this date — 60-year average.
0.16Mount Vernon, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.09Mount Vernon, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12Mount Vernon, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Mount Vernon, Friday, 4 September
Climate normal for this date — 60-year average.
0.14Mount Vernon, Saturday, 5 September
Climate normal for this date — 60-year average.
0.22Mount 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, VA 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, VA 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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