Navigation

Alerts

Montgomery Cnty(C+SE), MD
 Details for Montgomery Cnty(C+SE), MD Test Message
 Montgomery Cnty(NW), MD
 Details for Montgomery Cnty(NW), MD Test Message

Mobile Weather

Get Cliftonvaweather SmartPhone Weather
QRCODE CVAWX
Scan With Phone's QR Code Reader

NOAA KHB36 Manassas

  • KHB36 Manassas

NOAA WXM42 Hagerstown

  • WXM42 Hagerstown

External Links

  • WXForum.net

Site Participation Links

  • Mid-Atlantic Weather Network
  • APRS/CWOP
  • Blitzortung.org
  • pws weather
  • UK Met Office WOW
Test Message TEST MESSAGE - Montgomery Cnty(C+SE), MD  - Montgomery Cnty(NW), MD

WASHINGTON DC METRO AREA FORECAST DISCUSSION
Only minor changes needed to account for current conditions, including a few showers affecting the Allegheny Mountains this morning. Updated rain chances and aviation forecasts this afternoon/evening based on incoming computer models.

Current DC Area Radar & North America Lightning


Northeast US Radar

Regional Radar

North America Lightning

North America Lightning Strikes
Radar image courtesy of NWS. Lightning Data courtesy of Blitzortung.org and its Contributors.
spacer

Current Clifton Virginia Conditions & NWS Forecast

Updated: @ 17-Aug-2026 3:50pm - next update at 4:00pm  
Temperature Summary Outlook
Currently: 91.6, Max: 93.0, Min: 71.8 91.6°F
Warmer 0.7°F than last hour.

Extremely Hot

Feels like: 103°F

24-hr difference
16.5°FWarmer 16.5°F than yesterday at this time.
  Today Yesterday
High: 93.0°F
2:56pm 		80.1°F
5:45pm
Low: 71.8°F
6:29am 		73.2°F
11:06pm
High & Low August 2026
High:  95.5°F
08 August at 2:53 PM
Low:  66.2°F
01 August at 5:16 AM
Max Min:  74.8°F
14 August
Min Max:  80.1°F
16 August
High and Low 2026
High:  101.6°F
04 July at 3:01 PM
Low:  5.2°F
27 January at 7:52 AM
Max Min:  77.9°F
16 July
Min Max:  18.4°F
25 January
Record August
High:  101.9°F
at 15:51 on 02 August 2024
Low:  50.4°F
at 06:59 on 21 August 2024
Max Min:  77.5°F
at 06:27 on 13 August 2016
Min Max:  67.3°F
at 16:48 on 29 August 2017
Station All Time Record
High:  101.9°F
at 15:51 on 02 August 2024
Low:  1.0°F
at 07:23 on 23 January 2014
Max Min:  78.1°F
at 06:58 on 23 June 2024
Min Max:  16.7°F
at 12:04 on 16 February 2015
Records began on 24 December 2012
Wind Chill
Now:  91.6°F
Coldest Wind Chill
Today:  71.8°F
at 6:29am
Yesterday:  73.2°F
at 11:06pm
August 2026  66.2°F
01 August at 5:16 AM
2026  2.9°F
01 February at 8:34 AM
Station August  50.4°F
at 06:59 on 21 August 2024
Station All Time  °F
Records began on 24 December 2012
Degree Days
Heating Degree Days
Today: 0.0 Degree Days
Yesterday: 0.0 Degree Days
Cooling Degree Days
Today: 9.4 Degree Days
Yesterday: 10.4 Degree Days
Heat Index
Now:  106.4°F
Warmest Heat Index
Today:  112.8°F
at 14:41
Yesterday:  86.8°F
at 17:53
August 2026  117.4°F
06 August at 2:54 PM
2026  128.9°F
04 July at 3:04 PM
Station Record August  120.1°F
at 15:58 on 12 August 2021
Station All Time  128.9°F
at 15:04 on 04 July 2026
Records began on 24 December 2012
WeatherCam Thumbnail
North North West Camera
North North West WeatherCam
Mostly cloudy Mostly cloudy
Wind from ESE ESE
1
Gust:
 3 mph
0 Bft - Calm
Today: 9 mph 1:42pm
Gust Month: 23 mph August 10
Rain Today:  0.01 in
Rain Rate /hr  0.00 in
Rain Last Hour:  0.00 in
Rain 24hrs:  0.49 in
Wind

Station High August 2026
High Gust:  23 mph
10 August at 4:35 PM
High Average:  7 mph
10 August at 4:40 PM
Station High 2026
High Gust:  29 mph
07 February at 10:28 AM
High Average:  10 mph
12 March at 11:03 AM
Station Record August
High Gust:  32 mph
at 21:02 on 19 August 2017
High Average:  12 mph
at 14:57 on 21 August 2016
Station All Time Record
High Gust:  42 mph
at 12:56 on 04 January 2018
High Average:  24 mph
at 13:07 on 02 March 2018
Records began on 24 December 2012
Wind Run

Today:  9.1 miles
Yesterday:  15.4 miles
Highest Wind Run
August 2026  16.1 miles
13 August
2026  101.4 miles
07 February
August  91.3 miles
on 05 August 2017
Station All Time  284.2 miles
on 02 March 2018
Records began on 24 December 2012

Rain
Rain Today: 0.01 in
Rain Rate (/hr): 0.00 in
Rain Yesterday: 0.77 in
This Month: 3.58 in
Season Total: 18.63 in
0 day since last rain.

Days Since Last Dry Day: 1
Station High August 2026
High Day:  0.77 in
16 August
High Hour:  0.66 in
06 August at 7:13 PM
High Rain Rate /hr:  6.94 in
10 August at 4:38 PM
Station High 2026
High Day:  1.35 in
16 March
High Hour:  0.78 in
16 March at 1:42 PM
High Rain Rate /hr:  6.94 in
10 August at 4:38 PM
Station Record August
High Day:  3.20 in
on 01 August 2018
High Hour:  6.61 in
at 14:09 on 04 August 2017
High Rain Rate /hr:  6.94 in
at 16:38 on 10 August 2026
Station All Time Record
High Day:  5.17 in
on 21 July 2018
High Hour:  2.21 in
at 16:13 on 22 July 2020
High Rain Rate /hr:  64.00 in
at 10:49 on 19 October 2021
High Month:  10.27 in
July 2018
Records began on 24 December 2012
WeatherCam Thumbnail
South South West Camera
South South West WeatherCam
This
Afternoon
This Afternoon: Isolated Showers And Thunderstorms
Isolated Showers And T-Storms
Tonight

Tonight: Scattered Showers And Thunderstorms then Mostly Cloudy
Scattered Showers And T-Storms then Mostly Cloudy
Tuesday

Tuesday: Sunny
Sunny
Hi 91 °F Lo 71 °F Hi 86 °F
Lightning VA MD DC WV DE

Viginia Lighting
Radar Washington DC Metro Area

  GRLevel3 radar from NWS station KLWX

Storm Prediction Center Activity Chart

SPC Activity

Humidity & Barometer
Humidity: 64 % Decreased 1.0% since last hour.
Dew Point: 77.7°F Decreased 1.4°F since last hour.
Barometer: 29.82 inHg Falling 0.02 inHg/hr
Baro Trend: Falling
Today
Pressure High:  30.09 in
Pressure Low:  29.99 in
Dewpoint High:  33.1 °F
Dewpoint Low:  19.6 °F
Humidity High:  80%
Humidity Low:  40%
Station Record
Pressure High:  31.41 in
at 12:14 on 23 March 2017
Pressure Low:  28.99 in
at 07:41 on 07 February 2020
Dewpoint High:  82.7 °F
at 11:55 on 05 July 2024
Dewpoint Low:  -27.0 °F
at 01:57 on 20 February 2015
Records began on 24 December 2012
Snow

Snow Depth: 0.0 in
Snowfall Today: No Snow Today
Storm Total: 0.0 in
Total Season Snow: 13.0 in
Total Last Season: 15.5 in
Fire Danger
firedanger
Almanac
Sunrise: 6:24am
Sunset: 8:03pm
Moonrise: 11:47am
Moonset: 10:21pm

Day Length:  13:36
Dawn:  05:57
Dusk:  20:29
Daylight Length:  14:32
 There will be 2min 14s less daylight tomorrow

Cloud Base

cloudbase
CB AGL: 3160 ft
UV Index

   3.0   
 Medium 
High: 8.0 @ 1:51pm

Solar Radiation
339 W/m2
High: 1107 @  1:47pm

Air Quality Index
Current AQI
20
Good

Sunlight

13 hrs 39 min 9 sec
of Sunlight Today
Which is
2 min 14 sec Shorter
Than Yesterday
(Noon) graph (Midnight)
 Legend

Moon


Waxing Crescent
Waxing Crescent, Moon at 5 days in cycle
28% %
Illuminated
 NWS Weather Forecast  - Outlook: This Afternoon & Tonight
This
Afternoon
This Afternoon: Isolated Showers And Thunderstorms
Isolated Showers And T-Storms

Hi 91 °F		 NWS forecast: Isolated showers and thunderstorms after 5pm. Partly sunny, with a high near 91. Heat index values as high as 100. Northwest wind around 9 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Davis VP+ forecast: Mostly cloudy with little temperature change. Precipitation likely.		   Tonight

Tonight: Scattered Showers And Thunderstorms then Mostly Cloudy
Scattered Showers And T-Storms then Mostly Cloudy

Lo 71 °F		 NWS forecast: Scattered showers and thunderstorms before 8pm, then scattered showers and thunderstorms between 8pm and 9pm, then isolated showers and thunderstorms between 9pm and 10pm. Mostly cloudy, with a low around 71. Northwest wind 2 to 7 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
 NWS Weather Forecast  - Five Day Outlook for This Afternoon through Friday - Last Update: Mon, 17-Aug-2026 2:30pm EDT
This
Afternoon
This Afternoon: Isolated Showers And Thunderstorms
Isolated Showers And T-Storms
Tonight

Tonight: Scattered Showers And Thunderstorms then Mostly Cloudy
Scattered Showers And T-Storms then Mostly Cloudy
Tuesday

Tuesday: Sunny
Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Partly Cloudy then Slight Chance Rain Showers
Partly Cloudy then Slight Chance Rain Showers
Thursday

Thursday: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Thursday
Night
Thursday Night: Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers And T-Storms Likely then Chance Showers And T-Storms
Friday

Friday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Hi 91 °F Lo 71 °F Hi 86 °F Lo 67 °F Hi 88 °F Lo 70 °F Hi 85 °F Lo 67 °F Hi 80 °F

NWS Forecast Maps

NOAA Forecast Map for Today

Forecast Map for Today

NOAA Forecast Map for Tomorrow

Forecast Map for Tomorrow
Forecast map for Today courtesy of NOAA. Forecast map for Tomorrow courtesy of NOAA.

Random Weather Facts

Lightning
The average number of deaths from lightning is more than 100 a year with several more deaths from lightning related fires. Lightning injuries account for 3-5 times than those of lightning deaths.

Today in Weather History

Weather History for August 17
 
1984   Thunderstorms dropped 6 to 13 inches of rain at Tulsa, OK in 6 hours. The flooding claimed 14 lives and caused $90 million in property damage. 4600 cars, 743 houses, and 387 apartments were destroyed or severely damaged in the flood.
1967   A slow moving nor'easter battered New England with high winds, heavy rain, and record late season snow. Winds 70 to 90 mph in gusts occurred along the coast. Over 7 inches of rain fell at Nantucket, MS with 6.57 inches falling in 24 hours to set a new 24 hour rainfall record. 24.9 inches of snow fell at Mount Washington, NH to set a new May snowfall record.