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Radar image courtesy of Weather Underground. Lightning Data courtesy of Blitzortung.org and its Contributors.
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Current Clifton Virginia Conditions & NWS Forecast

Updated: @ 22-Jul-2017 10:45pm - next update at 11:00pm  
Temperature Summary Outlook
Currently: 73.6, Max: 93.7, Min: 72.7 73.6°F
Warmer 0.1°F than last hour.

Comfortable

Feels like: 74°F

24-hr difference
-8.8°FColder 8.8°F than yesterday at this time.
  Today Yesterday
High: 93.7°F
1:55pm
93.9°F
1:11pm
Low: 72.7°F
6:06pm
73.4°F
6:08am
High & Low July 2017
High:  95.9°F
20 July at 1:41 PM
Low:  64.2°F
09 July at 4:50 AM
Max Min:  74.5°F
01 July
Min Max:  81.5°F
06 July
High and Low 2017
High:  95.9°F
20 July at 1:41 PM
Low:  10.0°F
09 January at 2:00 AM
Max Min:  74.5°F
01 July
Min Max:  24.6°F
07 January
Record July
High:  100.4°F
at 2:12 PM on 25 July 2016
Low:  51.6°F
at 5:40 AM on 30 July 2014
Max Min:  76.8°F
at 5:39 AM on 27 July 2016
Min Max:  72.0°F
at 10:57 PM on 04 July 2016
Station All Time Record
High:  100.4°F
at 2:12 PM on 25 July 2016
Low:  1.0°F
at 7:23 AM on 23 January 2014
Max Min:  77.5°F
at 6:27 AM on 13 August 2016
Min Max:  16.7°F
at 12:04 PM on 16 February 2015
Records began on 24 December 2012
Wind Chill
Now:  73.6°F
Coldest Wind Chill
Today:  72.7°F
at 6:06pm
Yesterday:  73.4°F
at 6:08am
July 2017  64.2°F
09 July at 4:50 AM
2017  4.1°F
08 January at 2:24 AM
Station July  51.6°F
at 5:40 AM on 30 July 2014
Station All Time  -15.8°F
at 1:57 AM on 21 February 2015
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: 14.9 Degree Days
Yesterday: 20.3 Degree Days
Heat Index
Now:  73.6°F
Warmest Heat Index
Today:  101.1°F
at 12:54
Yesterday:  102.2°F
at 17:11
July 2017  105.0°F
14 July at 3:50 PM
2017  105.0°F
14 July at 3:50 PM
Station Record July  114.2°F
at 12:45 PM on 19 July 2013
Station All Time  114.2°F
at 12:45 PM on 19 July 2013
Records began on 24 December 2012
Mostly cloudy Mostly cloudy
 Wind from NNE NNE
0.3
Gust:
2.1 mph
0 Bft - Calm
Today: 20.1 mph 5:31pm
Gust Month: 22.1 mph July 14
Rain Today:  0.34 in
Rain Rate /hr  0.00 in
Rain Last Hour:  0.00 in
Rain 24hrs:  0.34 in
Wind
Station High July 2017
High Gust:  22.1 mph
14 July at 4:10 PM
High Average:  11.9 mph
22 July at 5:40 PM
Station High 2017
High Gust:  30.1 mph
08 March at 3:21 AM
High Average:  22.7 mph
22 March at 10:08 AM
Station Record July
High Gust:  22.1 mph
at 4:10 PM on 14 July 2017
High Average:  12.3 mph
at 4:11 PM on 18 July 2016
Station All Time Record
High Gust:  39.3 mph
at 10:04 PM on 14 February 2015
High Average:  22.7 mph
at 10:08 AM on 22 March 2017
Records began on 24 December 2012
Wind Run
Today:  50.3 miles
Yesterday:  34.2 miles
Highest Wind Run
July 2017  57.8 miles
01 July
2017  179.1 miles
14 March
July  93.0 miles
on 04 July 2014
Station All Time  246.9 miles
on 15 February 2015
Records began on 24 December 2012
Rain
Rain Today: 0.34 in
Rain Rate (/hr): 0.00 in
Rain Yesterday: 0.00 in
This Month: 4.14 in
Season Total: 21.76 in
0 day since last rain.
Days Since Last Dry Day: 0
Station High July 2017
High Day:  2.00 in
06 July
High Hour:  0.69 in
06 July at 8:27 AM
High Rain Rate /hr:  3.00 in
04 July at 7:47 PM
Station High 2017
High Day:  2.00 in
06 July
High Hour:  0.72 in
18 May at 8:23 PM
High Rain Rate /hr:  3.00 in
04 July at 7:47 PM
Station Record July
High Day:  2.00 in
on 06 July 2017
High Hour:  1.68 in
at 7:48 PM on 28 July 2015
High Rain Rate /hr:  3.84 in
at 8:37 PM on 28 July 2016
Station All Time Record
High Day:  3.02 in
on 30 April 2014
High Hour:  1.98 in
at 4:12 PM on 20 March 2015
High Rain Rate /hr:  5.03 in
at 5:35 PM on 03 June 2016
High Month:  7.18 in
April 2014
Records began on 24 December 2012
Tonight

Tonight: Widespread Showers And Thunderstorms
Widespread Showers And Thunderstorms
Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Lightning VA MD DC WV DE
Viginia Lighting
Radar Washington DC Metro Area
Local Radar
Storm Prediction Center Activity Chart
SPC Activity
Humidity & Barometer
Humidity: 97 % Increased 2.0% since last hour.
Dew Point: 72.7°F Increased 1.1°F since last hour.
Barometer: 29.85 inHg  
Baro Trend: Steady
Today
Pressure High:  29.97 in
Pressure Low:  29.82 in
Dewpoint High:  74.3 °F
Dewpoint Low:  64.4 °F
Humidity High:  97%
Humidity Low:  43%
Station Record
Pressure High:  31.41 in
at 12:14 PM on 23 March 2017
Pressure Low:  29.12 in
at 5:28 PM on 12 March 2014
Dewpoint High:  79.7 °F
at 11:26 AM on 19 July 2013
Dewpoint Low:  -58.6 °F
at 6:50 PM on 19 February 2017
Records began on 24 December 2012
Snow
Snow Depth: 0 in
Snowfall Today: No snow today
Storm Total: 0 in
Total Season Snow: 0 in
Total Last Season: 5.2 in
Fire Danger
firedanger
Almanac
Sunrise: 6:03am
Sunset: 8:30pm
Moonrise: 5:09am
Moonset: 7:44pm
Day Length:  14:27
Dawn:  05:32
Dusk:  21:01
Daylight Length:  15:29
 There will be 1min 34s less daylight tomorrow
Cloud Base
cloudbase
CB: 194 ft
UV Index Forecast Today
23-Jul-2017

9.8  Very High 
UV Index Forecast Tomorrow
24-Jul-2017

8.8  Very High 
Air Quality Index
Current AQI 40
Good
Sunlight
14 hrs 25 min 52 sec
of Sunlight Today
Which is
1 min 35 sec Shorter
Than Yesterday

(Noon)
graph (Midnight)
Legend
Moon
New Moon
New Moon, Moon at 0 days in cycle
0 %
Illuminated
Trends
These graphs present the temperature, pressure, rainfall, and wind speed trends for the last 24 hours.
The thumbnail graphs are sampled every ten minutes.
The large graphs are sampled every minute.
Weather Graphs
Click on weather description tab below to display the corresponding graph in the panel above.
Wind Graph Thumbnail Temperature Graph Thumbnail Pressure Graph Thumbnail Rain Graph Thumbnail
Wind Direction Thumbnail Temp Min/Max Graph Thumbnail Humidity Graph Thumbnail Today's Rainfall Graph Thumbnail Daily Rain Graph Thumbnail
 NWS Weather Forecast  - Outlook: Tonight & Sunday
Tonight

Tonight: Widespread Showers And Thunderstorms
Widespread Showers And Thunderstorms

Lo 72 °F
NWS forecast: Widespread showers and thunderstorms before 2am, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 72. Southwest wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
  Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And Thunderstorms

Hi 94 °F
NWS forecast: A chance of showers and thunderstorms. Mostly cloudy, with a high near 94. Heat index values as high as 102. West southwest wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
 NWS Weather Forecast  - Five Day Outlook for Tonight through Wednesday Night - Last Update: Sat, 22-Jul-2017 8:23pm EDT
Tonight

Tonight: Widespread Showers And Thunderstorms
Widespread Showers And Thunderstorms
Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday

Monday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And Thunderstorms then Partly Cloudy
Tuesday

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

Wednesday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And Thunderstorms then Partly Cloudy
Lo 72 °F Hi 94 °F Lo 74 °F Hi 92 °F Lo 70 °F Hi 87 °F Lo 68 °F Hi 85 °F Lo 70 °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.
Countdown to Fall
 Autumn Equinox begins September 22nd at 4:02pm   EDT  
 

 

Random Weather Facts

Weather Terms
Dense Fog Advisory - Widespread dense fog reducing visibility to less than 1/4 mile.

Today in Weather History

Weather History for July 22
 
1988
Six cities in the south central U.S. reported record low temperatures for the date, including Pueblo, CO, with a reading of 48 degrees. Thunderstorms over the Atlantic Coast Region drenched Wilmington, NC, with 6.49 inches of rain in about eight hours. (The National Weather Summary)

1989
Showers and thunderstorms prevailed across the southeastern third of the country. Afternoon thunderstorms in Florida produced wind gusts to 86 mph at Zephyrhills, and gusts to 92 mph at Carrollwood and Lutz. Thunderstorm winds gusting to 69 mph at Crystal Lake damaged nineteen mobile homes. (Storm Data) (The National Weather Summary)