Vienna, VA 22180
Current Weather Conditions [Select Refresh to Update] |
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Current Conditions |
Almanac |
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| Last Updated:
12:48pm on 11/10/09 Outside Temperature: 66.6 °F Today's High: 67.6 °F at 12:08pm Lo: 50.3 °F at 7:04am Barometric Trend: |
Sunrise :
6:47am Sunset: 5:00pm Moonrise: 12:02am Moonset: 1:27pm Moon Phase: 23 |
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|
Parameter |
Value | High | Time | Low | Time | Average | Rate | Rate Hi | Time | Rate Lo | Time |
|
Wind Direction |
NNE | 203 | 1:14am | 10 | 11:58am | 81 | -57.0 | 9.4 | 1:14am | -134.5 | 11:58am |
|
Wind Speed |
0 | 3 | 12:14pm | 0 | 12:00am | 0 | -0.2 | 2.8 | 12:14pm | -0.3 | 12:23pm |
|
Gust |
2 | 3 | 12:14pm | 0 | 12:00am | 2 | 0.2 | 1.9 | 1:14am | -1.7 | 12:30pm |
|
In Humidity |
41 | 41 | 10:55am | 39 | 12:00am | 41 | 0.2 | 1.1 | 10:55am | -1.0 | 10:17am |
|
Out Humidity |
56 | 88 | 7:02am | 54 | 12:14pm | 61 | -4.8 | 4.9 | 12:01am | -9.8 | 9:23am |
|
In Temp |
78.4 | 79.0 | 10:23am | 77.0 | 6:07am | 78.6 | -0.16 | 0.92 | 10:23am | -0.36 | 4:39am |
|
Out Temp |
66.6 | 67.6 | 12:08pm | 50.3 | 7:04am | 65.5 | 1.08 | 4.34 | 9:20am | -2.00 | 12:01am |
|
Barometer |
29.79 | 29.85 | 8:17am | 29.78 | 12:28pm | 29.80 | -0.012 | 0.018 | 7:06am | -0.022 | 11:40am |
|
Rain |
32.36 | 32.36 | 12:00am | 32.36 | 12:00am | 32.36 | 0.000 | 0.000 | 12:00am | 0.000 | 12:00am |
|
Ch 1 Temp |
0.0 | 0.0 | 12:00am | 0.0 | 12:00am | 0.0 | 0.00 | 0.00 | 12:00am | 0.00 | 12:00am |
|
Ch 1 Hum |
0 | 0 | 12:00am | 0 | 12:00am | 0 | 0.0 | 0.0 | 12:00am | 0.0 | 12:00am |
|
Ch 2 Temp |
0.0 | 0.0 | 12:00am | 0.0 | 12:00am | 0.0 | 0.00 | 0.00 | 12:00am | 0.00 | 12:00am |
|
Ch 2 Hum |
0 | 0 | 12:00am | 0 | 12:00am | 0 | 0.0 | 0.0 | 12:00am | 0.0 | 12:00am |
|
Ch 3 Temp |
0.0 | 0.0 | 12:00am | 0.0 | 12:00am | 0.0 | 0.00 | 0.00 | 12:00am | 0.00 | 12:00am |
|
Ch 3 Hum |
0 | 0 | 12:00am | 0 | 12:00am | 0 | 0.0 | 0.0 | 12:00am | 0.0 | 12:00am |
|
ET |
0.00 | 0.00 | 12:00am | 0.00 | 12:00am | 0.00 | 0.000 | 0.000 | 12:00am | 0.000 | 12:00am |
|
UV Index |
0.0 | 0.0 | 12:00am | 0.0 | 12:00am | 0.0 | 0.00 | 0.00 | 12:00am | 0.00 | 12:00am |
|
Solar |
0 | 0 | 12:00am | 0 | 12:00am | 0 | 0.0 | 0.0 | 12:00am | 0.0 | 12:00am |
|
Wind Chill |
66.6 | 67.6 | 12:08pm | 50.3 | 7:04am | 65.5 | 1.08 | 4.34 | 9:20am | -2.00 | 12:01am |
|
In Heat Index |
78.4 | 78.9 | 10:28am | 76.9 | 6:07am | 78.6 | -0.15 | 0.86 | 10:28am | -0.37 | 4:39am |
|
Heat Index |
68.0 | 69.3 | 12:10pm | 55.5 | 7:08am | 67.4 | 0.55 | 3.49 | 10:22am | -1.43 | 12:00am |
|
Dew Point |
50.4 | 53.4 | 11:04am | 46.6 | 7:08am | 51.5 | -1.10 | 2.53 | 10:15am | -1.71 | 12:14pm |
|
Barom Sea-level |
30.22 | 30.28 | 8:17am | 30.21 | 12:28pm | 30.23 | -0.012 | 0.018 | 7:06am | -0.023 | 11:40am |
|
Parameter |
Month High | Date | Month Low | Date | Year High | Date | Year Low | Date | Yesterday High | Yesterday Low | 24 Hour Difference |
|
Wind Direction |
360 | 11/1/09 | 5 | 11/1/09 | 360 | 1/1/09 | 0 | 2/8/09 | 360 | 9 | -96 |
|
Wind Speed |
10 | 11/7/09 | 0 | 11/1/09 | 22 | 2/11/09 | 0 | 1/1/09 | 7 | 0 | -1 |
|
Gust |
10 | 11/7/09 | 0 | 11/1/09 | 22 | 2/11/09 | 0 | 1/1/09 | 7 | 0 | -5 |
|
In Humidity |
54 | 11/1/09 | 33 | 11/6/09 | 74 | 8/12/09 | 24 | 1/8/09 | 44 | 35 | 5 |
|
Out Humidity |
94 | 11/3/09 | 39 | 11/8/09 | 100 | 2/2/09 | 22 | 4/18/09 | 92 | 47 | 10 |
|
In Temp |
83.7 | 11/9/09 | 70.4 | 11/9/09 | 97.5 | 3/18/09 | 65.8 | 4/8/09 | 83.7 | 70.4 | -3.4 |
|
Out Temp |
76.9 | 11/8/09 | 30.2 | 11/7/09 | 97.4 | 8/18/09 | 2.3 | 1/17/09 | 72.8 | 44.3 | -6.1 |
|
Barometer |
29.97 | 11/9/09 | 29.49 | 11/1/09 | 30.69 | 1/16/09 | 28.74 | 4/3/09 | 29.97 | 29.84 | -0.09 |
|
Rain |
32.36 | 11/1/09 | 31.71 | 11/1/09 | 32.36 | 11/1/09 | 0.00 | 1/1/09 | 32.36 | 32.36 | 0.00 |
|
Ch 1 Temp |
0.0 | 11/1/09 | 0.0 | 11/1/09 | 0.0 | 1/1/09 | 0.0 | 1/1/09 | 0.0 | 0.0 | 0.0 |
|
Ch 1 Hum |
0 | 11/1/09 | 0 | 11/1/09 | 0 | 1/1/09 | 0 | 1/1/09 | 0 | 0 | 0 |
|
Ch 2 Temp |
0.0 | 11/1/09 | 0.0 | 11/1/09 | 0.0 | 1/1/09 | 0.0 | 1/1/09 | 0.0 | 0.0 | 0.0 |
|
Ch 2 Hum |
0 | 11/1/09 | 0 | 11/1/09 | 0 | 1/1/09 | 0 | 1/1/09 | 0 | 0 | 0 |
|
Ch 3 Temp |
0.0 | 11/1/09 | 0.0 | 11/1/09 | 0.0 | 1/1/09 | 0.0 | 1/1/09 | 0.0 | 0.0 | 0.0 |
|
Ch 3 Hum |
0 | 11/1/09 | 0 | 11/1/09 | 0 | 1/1/09 | 0 | 1/1/09 | 0 | 0 | 0 |
|
ET |
0.53 | 11/1/09 | 0.00 | 11/1/09 | 0.92 | 6/8/09 | 0.00 | 1/1/09 | 0.00 | 0.00 | 0.00 |
|
UV Index |
0.0 | 11/1/09 | 0.0 | 11/1/09 | 16.0 | 3/29/09 | 0.0 | 1/1/09 | 0.0 | 0.0 | 0.0 |
|
Solar |
1782 | 11/1/09 | 0 | 11/1/09 | 1782 | 3/29/09 | 0 | 1/1/09 | 0 | 0 | 0 |
|
Wind Chill |
76.9 | 11/8/09 | 30.2 | 11/7/09 | 97.4 | 8/18/09 | -5.8 | 1/16/09 | 72.8 | 44.3 | -6.1 |
|
In Heat Index |
82.4 | 11/9/09 | 70.6 | 11/9/09 | 96.0 | 3/18/09 | 65.3 | 4/8/09 | 82.4 | 70.6 | -2.5 |
|
Heat Index |
77.1 | 11/8/09 | 35.5 | 11/7/09 | 113.6 | 8/10/09 | 6.5 | 1/17/09 | 73.6 | 49.8 | -5.1 |
|
Dew Point |
53.8 | 11/8/09 | 26.6 | 11/6/09 | 78.4 | 6/20/09 | -9.2 | 1/16/09 | 53.5 | 41.3 | -0.4 |
|
Barom Sea-level |
30.41 | 11/9/09 | 29.92 | 11/1/09 | 30.69 | 1/16/09 | 29.15 | 4/3/09 | 30.41 | 30.28 | -0.09 |
|
Press Altitude |
124 | Daily Rain | 0.00 | Degree Heating | 5.2 | Monthly Degree Day Cooling | 3.4 | Heat Index | --- | Beaufort | Calm |
|
Cloud Base |
4042 | Hourly Rain | 0.00 | Degree Cooling | 0.1 | Monthly Wind Run | 38 | Comfort Index | Comfortable | ||
|
Air Density |
668 | 24Hr Rain | 0.00 | Moon Phase | 23 | Yearly Deg Day Heating | 3524.7 | Forecast | Increasing clouds and warmer. Precip possible within 24 to 48 hrs | ||
|
Virtual Temp |
69.1 | Rain Rate | 0.000 | Monthly Rain | 0.65 | Yearly Degree Day Cooling | 1190.7 | Station Barom Trend | Steady | ||
|
Vapor Press |
0.37 | Wind Run | 1 | Monthly Deg Day Heating | 149.0 | Yearly Wind Run | 2650 | Barometer Trend | Steady | ||
Updated Automatically by Ambient Software's
Virtual Weather Station V14.00 |
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