Temperature
62 F at 4 AM; 69 F at its warmest, 6 AM Thursday, and 61 F at its coolest, 11 PM Thursday.
- Now
- 62F
- 4 AM
- Highest
- 69F
- 6 AM Thursday
- Lowest
- 61F
- 11 PM Thursday
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Airports/District of Columbia/Ronald Reagan Washington National Airport
Ronald Reagan Washington National Airport, District of Columbia
Large airport in District of Columbia, District of Columbia63°
82°/61°
Light drizzle·
Feels like 63°·Gentle breeze 9 mph S
Coming up. Tomorrow is 28 degrees cooler: a high of 54° after 82° today.
Now. Ronald Reagan Washington National Airport is 63° and light drizzle at 5 AM. The dew point is 61°, so the air feels humid and sticky. Gentle breeze from the south at 9 mph.
Today and tonight. It warms to about 81° by 4 PM. Tonight falls to about 52° by 8 AM, under cloud.
The week. The warmest day ahead is Wednesday, near 66°, and the coolest tomorrow, near 54°. Rain is likely tomorrow (57%).
The sky tonight. The sun sets at 6:29 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:26 PM. The next full Moon is Monday, Oct 26. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. Cloud is forecast to cover most of the night, so the sky will be hard to see. The day is 11 hours 12 minutes long, 3 minutes shorter than yesterday.
0UV Low
22Air quality
96%Humidity
100%Cloud
Now
5:00 AM
63feels63
now, drizzle light
Today
Oct 16
8261
86%
17mph
Sat
Oct 17
5451
57%
19mph
Sun
Oct 18
5740
14mph
Mon
Oct 19
6043
24%
16mph
Tue
Oct 20
6548
15%
15mph
Wed
Oct 21
6652
15mph
Thu
Oct 22
6452
13%
15mph
63°
82°61°
54°51°
57°40°
60°43°
65°48°
66°52°
64°52°
As of 5:00 AM in Ronald Reagan Washington National Airport, District of Columbia.
Air quality
The air at Ronald Reagan Washington National Airport
Index 22, good, led by fine particles. Read at 5 AM from its reporting area, Northern Virginia and DC (DC), 5 miles off.
22Good
- Fine particles (PM2.5)22Good18.6 mi
- Ozone17Good12 ppb16.1 mi
- Nitrogen dioxide3Good3.4 ppb16.6 mi
- Sulfur dioxide0Good0 ppb16.6 mi
- Carbon monoxide-0.1 ppm16.6 mi
The days ahead
Good each day through Sun Oct 18, led by fine particles. Yesterday measured 23, good.
GoodModerate
- 23YesterdayOct 15
- 33TodayOct 16
- 17SatOct 17
- 28SunOct 18
Smoke, the next 46 hours
Little smoke near the ground through Sun 2 AM: the index from smoke stays at 6 or under.
Precipitation
What has fallen at Ronald Reagan Washington National Airport
0.06 in in the last 24 hours, and none in the 2 days before, to Fri 4 AM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.06in
- Last 3 days
- 0.06in
Visibility
How far you can see at Ronald Reagan Washington National Airport, the next 46 hours
Visibility stays 3 miles or more through Sun 2 AM, lowest 4 miles Fri 5 AM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- DCA
- ICAO
- KDCA
- IATA
- DCA
- Field elevation
- 15 ft
- Serves
- Washington
- Kind
- Large airport
- Scheduled service
- Yes
- Its own instrument
- DCA
- Wind now
- From 180° at 8 mph, read 16 Oct, 04:52
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 01 / 19 | 7,169 ft | 150 ft | Asphalt | 356° / 176° | 8 mph head, on 19 | 1 mph from the right |
| 04 / 22 | 5,000 ft | 150 ft | Asphalt | 26° / 206° | 7 mph head, on 22 | 4 mph from the left |
| 15 / 33 | 5,204 ft | 150 ft | Asphalt | 143° / 323° | 6 mph head, on 15 | 5 mph from the right |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Washington/National (DCA), Ronald Reagan Washington National Airport's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 61 F, the air 96% saturated; the humidity ran from 63% at 12 PM Thursday to 96% at 4 AM.
- Dew point now
- 61F
- 4 AM
- Humidity now
- 96%
- Humidity, range
- 63 to 96%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
9 mph from the south at 5 AM; at its strongest 15 mph, 8 AM Thursday, with a gust of 17 mph at 7 AM Thursday.
- Now
- 9mph
- from the south
- Strongest
- 15mph
- 8 AM Thursday
- Highest gust
- 17mph
- 7 AM Thursday
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
29.98 inHg at 5 AM, falling 0.06 inHg over 3 hours; 0.14 inHg lower than a day before.
- Now
- 29.98inHg
- 5 AM
- 3 hours
- -0.06inHg
- falling
- 24 hours
- -0.14inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
Down to 4 miles at 11 PM Thursday; 5 miles now.
- Now
- 5mi
- Lowest
- 4mi
- 11 PM Thursday
- Hours under a mile
- 0
How it is measured: Fog types, Field Book FB-WAT-020
Cloud base
The lowest cloud base came down to 600 ft at 3 AM; a base was reported in 24 of the hours.
- Lowest base now
- 600ft
- Lowest in 24 hours
- 600ft
- 3 AM
- Hours with a base reported
- 24
How it is measured: Cloud classification, Field Book FB-SKY-001
Precipitation
0.06 in measured in the gauge, the most, 0.02 in, in the hour to 11 PM Thursday.
- Last 24 hours
- 0.06in
- Wettest hour
- 0.02in
- 11 PM Thursday
- Hours with some
- 9
How it is measured: ASOS, Field Book FB-INS-002
Washington/National: every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 3 instruments nearest Ronald Reagan Washington National Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.
measured now1 instrument
At an airfield/0.4 mi away/66 ft/51 ft above here
measured daily2 instruments
Washington 2.0 SSWDC-DC-9
In a volunteer observer's own ground/1.9 mi away/10 ft/5 ft below here
precip, snowfall, snow depth
National ArboretumNARD2
In a park or preserve/5.1 mi away/13 ft/2 ft below here
snowfall, snow depth, precip, high, low
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in District of Columbia
3 places, each with its own forecast and its own instruments.
Near Ronald Reagan Washington National Airport
The nearest places, each with its own forecast and the instruments nearest it.
- Washingtoncity, 3 mi
- Anacostia Riverfeature, 4 mi
- Rock Creek Parkfeature, 8 mi