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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: @ 19-Sep-2017 12:45pm - next update at 1:00pm  
Temperature Summary Outlook
Currently: 78.1, Max: 78.6, Min: 65.7 78.1°F
Warmer 2.6°F than last hour.

Comfortable

Feels like: 78°F

24-hr difference
-1.8°FColder 1.8°F than yesterday at this time.
  Today Yesterday
High: 78.6°F
12:28pm
81.1°F
1:35pm
Low: 65.7°F
3:01am
65.1°F
2:42am
High & Low September 2017
High:  87.3°F
05 September at 1:19 PM
Low:  48.7°F
10 September at 5:50 AM
Max Min:  66.2°F
14 September
Min Max:  61.9°F
02 September
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:  75.6°F
18 August
Min Max:  24.6°F
07 January
Record September
High:  95.4°F
at 1:37 PM on 09 September 2016
Low:  42.6°F
at 7:04 AM on 18 September 2013
Max Min:  72.7°F
at 5:07 AM on 09 September 2015
Min Max:  61.9°F
at 10:43 PM on 02 September 2017
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:  78.1°F
Coldest Wind Chill
Today:  65.7°F
at 3:01am
Yesterday:  65.1°F
at 2:42am
September 2017  48.7°F
10 September at 5:50 AM
2017  4.1°F
08 January at 2:24 AM
Station September  42.6°F
at 7:04 AM on 18 September 2013
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: 2.0 Degree Days
Yesterday: 6.9 Degree Days
Heat Index
Now:  78.1°F
Warmest Heat Index
Today:  78.6°F
at 12:28
Yesterday:  83.1°F
at 13:35
September 2017  90.9°F
05 September at 1:19 PM
2017  106.7°F
18 August at 1:11 PM
Station Record September  105.6°F
at 1:36 PM on 10 September 2016
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 WSW WSW
3.3
Gust:
5.0 mph
1 Bft - Light air
Today: 12.1 mph 9:40am
Gust Month: 15.9 mph September 5
Rain Today:  0.00 in
Rain Rate /hr  0.00 in
Rain Last Hour:  0.00 in
Rain 24hrs:  0.00 in
Wind
Station High September 2017
High Gust:  15.9 mph
05 September at 5:36 PM
High Average:  8.9 mph
08 September at 12:08 PM
Station High 2017
High Gust:  32.2 mph
19 August at 9:02 PM
High Average:  22.7 mph
22 March at 10:08 AM
Station Record September
High Gust:  21.0 mph
at 1:39 PM on 06 September 2016
High Average:  18.4 mph
at 4:29 PM on 13 September 2015
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:  31.4 miles
Yesterday:  23.1 miles
Highest Wind Run
September 2017  49.8 miles
05 September
2017  179.1 miles
14 March
September  97.0 miles
on 29 September 2016
Station All Time  246.9 miles
on 15 February 2015
Records began on 24 December 2012
Rain
Rain Today: 0.00 in
Rain Rate (/hr): 0.00 in
Rain Yesterday: 0.00 in
This Month: 1.65 in
Season Total: 31.68 in
5 days since last rain.
Days Since Last Dry Day: 0
Station High September 2017
High Day:  0.66 in
02 September
High Hour:  0.20 in
02 September at 5:38 AM
High Rain Rate /hr:  0.72 in
02 September at 8:28 AM
Station High 2017
High Day:  2.00 in
06 July
High Hour:  6.61 in
04 August at 2:09 PM
High Rain Rate /hr:  3.59 in
28 July at 2:12 PM
Station Record September
High Day:  1.77 in
on 29 September 2015
High Hour:  1.11 in
at 1:10 AM on 02 September 2013
High Rain Rate /hr:  2.40 in
at 12:09 PM on 28 September 2016
Station All Time Record
High Day:  3.02 in
on 30 April 2014
High Hour:  6.61 in
at 2:09 PM on 04 August 2017
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
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Mostly Clear
Mostly Clear
Wednesday

Wednesday: Sunny
Sunny
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: 67 % Decreased 8.0% since last hour.
Dew Point: 66.3°F Decreased 0.3°F since last hour.
Barometer: 30.02 inHg Falling 0.01  inHg/hr
Baro Trend: Falling slowly
Today
Pressure High:  30.08 in
Pressure Low:  30.02 in
Dewpoint High:  67.4 °F
Dewpoint Low:  64.3 °F
Humidity High:  97%
Humidity Low:  65%
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: 6:55am
Sunset: 7:11pm
Moonrise: 6:05am
Moonset: 7:05pm
Day Length:  12:16
Dawn:  06:28
Dusk:  19:38
Daylight Length:  13:10
 There will be 2min 30s less daylight tomorrow
Cloud Base
cloudbase
CB: 2683 ft
UV Index Forecast Today
19-Sep-2017

6.4  High 
UV Index Forecast Tomorrow
20-Sep-2017

6.3  High 
Air Quality Index
Current AQI 55
Moderate
Sunlight
12 hrs 14 min 50 sec
of Sunlight Today
Which is
2 min 30 sec Shorter
Than Yesterday

(Noon)
graph (Midnight)
Legend
Moon
New Moon
New Moon, Moon at 27 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: This Afternoon & Tonight
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny

Hi 82 °F
NWS forecast: Mostly sunny, with a high near 82. North wind around 12 mph.
  Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 63 °F
NWS forecast: Mostly clear, with a low around 63. North northwest wind 6 to 9 mph.
 NWS Weather Forecast  - Five Day Outlook for This Afternoon through Saturday - Last Update: Tue, 19-Sep-2017 12:14pm EDT
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Tonight

Tonight: Mostly Clear
Mostly Clear
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Saturday

Saturday: Sunny
Sunny
Hi 82 °F Lo 63 °F Hi 85 °F Lo 64 °F Hi 85 °F Lo 64 °F Hi 86 °F Lo 64 °F Hi 85 °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
Winter Storms - These are weather hazards associated with freezing or frozen precipitation (freezing rain, sleet, snow) or combined effects of winter precipitation and strong winds.

Today in Weather History

Weather History for September 19
 
1987
Cool autumn-like weather invaded the Central Rockies. Temperatures dipped into the 30s and 40s, with readings in the teens and 20s reported in the higher elevations. Gunnison CO was the cold spot in the nation with a morning low of 15 degrees. (The National Weather Summary)

1989
Showers and thunderstorms produced heavy rain in the Middle and Northern Atlantic Coast Region. Cape Hatteras NC was deluged with nearly 3.50 inches of rain in three hours. Syracuse NY reported 1.77 inches of rain, a record for the date, and Chatham NJ reported an all-time record of 3.45 inches in one day. Hurricane Hugo headed for the Bahamas, and Tropical Storm Iris, following close on its heels, strengthened to near hurricane force. (The National Weather Summary)