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Mount Vernon, Virginia Weather

Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →

Mount Vernon weather forecast — hour by hour, 7-day outlook, NOAA radar

Mount Vernon, VA
Sunday, July 5 at 1:29 AM
75
°
Overcast
Feels like
81°
Humidity
86%
Wind
5 mph
Sunrise
1:49 AM
Sunset
4:36 PM
Mount Vernon, VA
Hour by hour · 24h
24-Hour ForecastMount Vernon, VA: 24-hour forecast. Temperatures range from 74 to 95 degrees Fahrenheit with a 42% chance of precipitation at 9 PM.
L 74°H 95°
Mount Vernon, VA
7-day forecast
  1. Today
    Jul 5
    Light Showers
    42%
    0.09″
    95°74°—
  2. Monday
    Jul 6
    Heavy Drizzle
    83%
    —
    92°74°-3°
  3. Tuesday
    Jul 7
    Thunderstorm
    83%
    —
    79°71°-13°
  4. Wednesday
    Jul 8
    Light Drizzle
    44%
    —
    80°69°+1°
  5. Thursday
    Jul 9
    Overcast
    31%
    —
    97°67°+17°
  6. Friday
    Jul 10
    Drizzle
    46%
    0.07″
    99°72°+2°
  7. Saturday
    Jul 11
    Light Drizzle
    37%
    —
    85°70°-14°
Mount Vernon, VA
Next 24 hours · Mild now
HOT 90°65°83°100°12a6a12p6pnow 75°high 95°low 74°PRECIP %
Mount Vernon, VA
Anemometer · 24h winds · from true
NESW
From · True
NW
317° · backing 34°
Direction
NW
317°
Sustained
5
mph
Gust
12
mph
Peak 24h
29
avg 4
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 4 · pk 29 @ 7:00p
0102030MPHB1B2B3B4B5B6B7-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 312SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 34° from the nw.
Mount Vernon, VA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1011.2
-0.7 mb in 3h · falling · 29.86 inHg
Now
1011.2
mb
3h
-0.7
mb
12h
-0.5
mb
24h
-0.6
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1008–1013
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1012.61008.11011.2
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Mount Vernon, VA
Air quality
53
AQI
Moderate
↓-55 in 6h

AQI 53 (Moderate), driven by PM2.5. AQI down 55 over the last 6 hours — air quality is improving sharply. PM2.5 at 14.7 µg/m³, PM10 at 15.1 µg/m³ — typical background levels with no transport signature.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERModerate
14.7μg/m³
PM 10Good
15μg/m³
NO₂Good
16μg/m³
OzoneGood
52μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 14.7 µg/m³, PM10 at 15.1 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.97
Wind
light
Recent rain
1h in last 6h
Pattern
background

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³400
Mount Vernon, VA
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
30.6mi
UNLIMITED
122 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
05:29 UTC · Mount Vernon, VA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
05:29 UTC · Mount Vernon, VA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Mount Vernon, VA
Satellite · infrared · animated
Mount Vernon, VA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Mount Vernon, VA
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:18 AM
Sunrise
1:49 AM
Daylight
14h 47m
Sunset
4:36 PM
Civil dusk
9:09 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Mount Vernon, VA
The moon
Waning Gibbous
75% illuminated
Moonrise
11:25 PM
Moonset
11:18 AM
In sign
♓︎ Pisces
Mount Vernon, VA
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Mount Vernon at a glance

  • Today vs. normal: 75°F — typical for the season
  • Last frost: April 8 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

15-Day Forecast — Mount Vernon

  1. Sun94°75°42%
  2. Mon92°74°83%
  3. Tue79°71°83%
  4. Wed80°69°44%
  5. Thu97°67°31%
  6. Fri99°72°46%
  7. Sat85°70°37%
  8. Sun82°65°19%
  9. Mon87°63°18%
  10. Tue92°61°10%
  11. Wed91°63°24%
  12. Thu92°67°26%
  13. Fri92°67°33%
  14. Sat91°71°36%
  15. Sun90°68°49%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Mount Vernon

SPC has placed Mount Vernon in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWSLGTSlight Risk
  • DAY 3TSTMGeneral Thunderstorms

Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

January 1–5: The year turns in silence.January 6–10: Ice thickens on still water.January 11–15: Shortest shadows lengthen.January 16–20: Pheasants begin to call.January 21–25: Springs begin to thaw.January 26–31: Chickadees announce dawn.February 1–5: East wind softens the frost.February 6–10: Sap begins to rise.February 11–15: First snowdrops appear.February 16–20: Red-winged blackbirds return.February 21–25: Rain begins to replace snow.February 26–28: Skunk cabbage pushes through ice.March 1–5: Ice withdraws from the reservoir.March 6–10: Crocuses open to weak sun.March 11–15: Peepers call from the marsh.March 16–20: Woodcocks spiral at dusk.March 21–25: Equinox — light overtakes dark.March 26–31: Forsythia opens along the fences.April 1–5: Cherry blossoms drift like snow.April 6–10: Warblers appear in the understory.April 11–15: Magnolias bloom and fall in a day.April 16–20: Dogwoods float above the forest.April 21–25: Lilacs perfume the evening.April 26–30: Last frost releases the garden.May 1–5: Warblers flood the Ramble.May 6–10: Tulip poplars light their candles.May 11–15: Shad run up the rivers.May 16–20: Roses open along the stoops.May 21–25: Firefly scouts appear at dusk.May 26–31: Strawberries ripen in the sun.June 1–5: Fireflies rise from the lawn.June 6–10: Elderflowers open in hedgerows.June 11–15: Solstice approaches — longest light.June 16–20: Honeysuckle sweetens the night.June 21–25: Solstice — the sun stands still.June 26–30: Lightning bugs drift through oaks.July 1–5: Cicadas claim the afternoon.July 6–10: Queen Anne's lace lines the roads.July 11–15: Thunder builds each afternoon.July 16–20: Corn reaches for the tassels.July 21–25: Dog days settle in the haze.July 26–31: Katydids begin their chorus.August 1–5: Night falls a minute earlier.August 6–10: Sunflowers face the morning.August 11–15: Goldenrod begins to bloom.August 16–20: Crickets pulse through warm nights.August 21–25: First cool morning surprises.August 26–31: Monarchs stage for flight.September 1–5: School buses reappear.September 6–10: Asters purple the roadsides.September 11–15: Hawk migration over the Hudson.September 16–20: Equinox — dark overtakes light.September 21–25: Apples hang heavy on the branch.September 26–30: Geese begin to chevron south.October 1–5: Witch hazel blooms as others fade.October 6–10: Maples begin to blaze.October 11–15: Frost paints the garden black.October 16–20: Oaks turn bronze and russet.October 21–25: Leaves rattle down the gutters.October 26–31: Clocks fall back — dusk at five.November 1–5: Ginkgos drop overnight.November 6–10: Last leaves cling stubbornly.November 11–15: Juncos arrive from the north.November 16–20: Bare branches reveal the sky.November 21–25: First flurries dust the rooftops.November 26–30: Woodsmoke curls through the block.December 1–5: Darkness settles before dinner.December 6–10: Holly and winterberry persist.December 11–15: Shortest day approaches.December 16–20: Ice begins to form at the edges.December 21–25: Solstice — the sun begins return.December 26–31: The year turns in silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Cicadas claim the afternoon

Annual cicada buzz begins, peaking in the heat of the day.

Day 186 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

A year in weather

Mount Vernon's warmest month is July (~79°F mean) and its coldest is January (~34°F). Rainfall peaks in August (4.2 inches) and bottoms out in October (2.6 inches).

MonthMean tempPrecipRainy days
January34°3.4″13
February37°2.8″12
March45°3.4″14
April56°3.6″16
May64°3.4″17
June73°3.8″17
July79°3.2″17
August78°4.2″18
September71°3.2″13
October60°2.6″11
November47°3.5″12
December38°3.8″13

Regional context

Mount Vernon's climate, from NOAA NCEI 1991-2020 station normals, pairs 34°F Januarys with 79°F Julys — a 45°F swing. About 41 inches of precipitation falls over roughly 174 days a year.

Mount Vernon's precipitation spreads evenly: August peaks at 4.2 inches on 18.0 wet days, while October holds 2.6 inches over 11.4 — no month dominates Mount Vernon's rain calendar. That even rhythm groups Mount Vernon with places like Woodlawn, VA, Fort Belvoir, VA and Hybla Valley, VA.

Mount Vernon's growing window opens around mid-April, once Mount Vernon's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. Warm-soil crops in Mount Vernon wait about two weeks past Mount Vernon's last frost, once the soil warms. It shuts near mid-November, when freezes return to Mount Vernon and tender plants need cover. Within Mount Vernon, cold-air pooling chills low spots by 5-10°F, shifting Mount Vernon's local frost dates.

Similar climates: Woodlawn, VA, Fort Belvoir, VA, Hybla Valley, VA, Fort Hunt, VA, Hayfield, VA.

Frequently asked

When does it freeze in Mount Vernon?
Frost typically leaves Mount Vernon by mid-April and returns to Mount Vernon near mid-November.
What is the rainy season in Mount Vernon?
August is the wettest month in Mount Vernon, about 4.2 inches on average; the year totals roughly 41 inches.
What is the warmest month in Mount Vernon?
July is Mount Vernon's warmest month, averaging about 79°F.
What is the coldest month in Mount Vernon?
Mount Vernon bottoms out in January, with a mean near 34°F.
When can I start a vegetable garden in Mount Vernon?
Mount Vernon's last frost (mid-April) cues hardy greens; in Mount Vernon, hold heat-lovers two weeks past.
How many rainy days does Mount Vernon get?
Expect roughly 174 wet days a year in Mount Vernon.
What hardiness zone is Mount Vernon?
Mount Vernon's hardiness zone tracks its winter low; with January near 34°F, check the USDA ZIP map for the exact zone.
What is the 10-day forecast for Mount Vernon?
Mount Vernon's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Mount Vernon?
See this week's day-by-day rain chances for Mount Vernon in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Mount Vernon?
Current conditions for Mount Vernon and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Mount Vernon forecast updated?
The Mount Vernon forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Mount Vernon?
Today's sunrise and sunset times for Mount Vernon are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Mount Vernon?
The next few days in Mount Vernon's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Mount Vernon, Virginia occupies a warm-summer humid continental zone, with January means near 34°F and July around 79°F — a 45°F swing.

Across the year, Mount Vernon collects about 41 inches of precipitation over roughly 174 days with measurable rain or snow.

The 45°F gap between Mount Vernon's summer and winter, at 38.7°N, shapes Mount Vernon's frost calendar.

All cities in Virginia →

Alexandria, VA weather →

ZIP codes in Mount Vernon

  • 22309
  • 22121

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.