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Arlington, Virginia 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Fort Myer VA
National Weather Service Forecast for: Fort Myer VA
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 2:22 pm EDT Jul 19, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 68. North wind 5 to 8 mph becoming calm  in the evening.
Partly Cloudy

Monday

Monday: Mostly sunny, with a high near 85. Light and variable wind becoming south around 6 mph in the afternoon.
Mostly Sunny

Monday
Night
Monday Night: A chance of showers and thunderstorms after 2am.  Increasing clouds, with a low around 71. South wind 5 to 7 mph.  Chance of precipitation is 40%.
Mostly Cloudy
then Chance
Showers
Tuesday

Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm.  High near 88. South wind 6 to 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Chance
Showers then
Showers
Tuesday
Night
Tuesday Night: Showers and possibly a thunderstorm.  Low around 72. Southwest wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 90%.
Showers

Wednesday

Wednesday: Showers likely, with thunderstorms also possible after 11am.  Partly sunny, with a high near 86. Chance of precipitation is 60%.
Showers
Likely then
Chance
T-storms
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before 8pm, then a slight chance of showers.  Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Chance
T-storms then
Slight Chance
Showers
Thursday

Thursday: Sunny, with a high near 81.
Sunny

Thursday
Night
Thursday Night: Mostly clear, with a low around 64.
Mostly Clear

Lo 68 °F Hi 85 °F Lo 71 °F Hi 88 °F Lo 72 °F Hi 86 °F Lo 65 °F Hi 81 °F Lo 64 °F

 

Tonight
 
Partly cloudy, with a low around 68. North wind 5 to 8 mph becoming calm in the evening.
Monday
 
Mostly sunny, with a high near 85. Light and variable wind becoming south around 6 mph in the afternoon.
Monday Night
 
A chance of showers and thunderstorms after 2am. Increasing clouds, with a low around 71. South wind 5 to 7 mph. Chance of precipitation is 40%.
Tuesday
 
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 88. South wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
 
Showers and possibly a thunderstorm. Low around 72. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Wednesday
 
Showers likely, with thunderstorms also possible after 11am. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Wednesday Night
 
A chance of showers and thunderstorms before 8pm, then a slight chance of showers. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
 
Sunny, with a high near 81.
Thursday Night
 
Mostly clear, with a low around 64.
Friday
 
Sunny, with a high near 84.
Friday Night
 
Partly cloudy, with a low around 67.
Saturday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Saturday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Sunday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Fort Myer VA.

Weather Forecast Discussion
631
FXUS61 KLWX 191916
AFDLWX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
316 PM EDT Sun Jul 19 2026

.WHAT HAS CHANGED...

Risk of significant severe weather seems to be increasing for
Tuesday, but diminishing for Wednesday due to faster timing of
front.


&&

.KEY MESSAGES...
- Smoke concentrations will continue through this evening before
  diminishing late tonight; quiet weather expected Monday;
  showers and thunderstorms return Monday night into Tue
  morning.

- A strong cold front and trough of low pressure will likely bring
  strong to severe storms Tuesday, and possibly Wednesday.

&&

.DISCUSSION...

KEY MESSAGE 1...Smoke concentrations will continue through this evening before
diminishing late tonight; quiet weather expected Monday;
showers and thunderstorms return Monday night into Tue morning.

KEY MESSAGE 1 DESCRIPTION...

Isolated to scattered showers across the VA Piedmont will
continue to dwindle as instability wanes and dry air advection
continues on NW wind. Smoke will continue to impact skies and
air quality across the region through this evening with smoke
concentrations diminishing per HRRR forecasts.

High pressure builds over the area tonight supporting dry and
cooler conditions.

Strong moisture return Monday night could result in some
showers and thunderstorms spreading northward with time.


KEY MESSAGE 2...A strong cold front and trough of low pressure will likely
bring strong to severe storms Tuesday, and possibly Wednesday.

KEY MESSAGE 2 DESCRIPTION...

Guidance continues to show an anomalous upper-level trough building
over the area, and the cold front associated with this system will
approach Tuesday before passing through the area Wednesday.

There still remains uncertainty in timing and placement of upper
trough and front, but hot and humid air ahead of the front along
with lower heights and a strong wind field aloft increases the
threat for severe thunderstorms.

SPC outlooks already have our area in a slight to enhanced risk
Tuesday, and a 15% near and east of Interstate 95 for Wednesday. ML
guidance highlights Tuesday as well, with some even showing higher
probabilities. Damaging winds will likely be the primary threat with
storms, although other hazards cannot be ruled out if supercells
develop.

Behind this system will be lower humidity and cooler than normal
temperatures for the second half of next week with high pressure
returning to the region.

&&

.AVIATION /18Z SUNDAY THROUGH FRIDAY/...

VFR conditions are expected most of the time Tuesday through
Thursday, but strong to severe thunderstorms are likely Tuesday and
possible Wednesday, especially in the afternoon and evening.

&&

.MARINE...

Strengthening southerly flow Monday evening into Wednesday
morning will result in SCA conditions.

A southwest flow is expected ahead of a cold front Tuesday into
Wednesday. An SCA will likely be needed since there will be a
stronger gradient for this time of year. Strong to severe storms are
likely Tuesday afternoon/evening and possible Wednesday
afternoon/evening.  High pressure will build in behind the cold
front for Thursday with a northerly flow. Winds may approach SCA
criteria, but confidence is low.

&&

.TIDES/COASTAL FLOODING...

Increasing southerly flow from Monday evening into Tuesday
will lead to water levels reaching Action stages, but minor
flooding is not expected at this time.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...None.
MD...None.
VA...Air Quality Alert until midnight EDT tonight for VAZ028.
WV...Air Quality Alert until midnight EDT tonight for WVZ050>053-
     501>504.
MARINE...None.

&&

$$

DISCUSSION...BJL/LFR
AVIATION...BJL/LFR
MARINE...BJL/LFR
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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