Weather History for Gaithersburg, MD

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Wednesday, February 20, 2013

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 29 °F -  
Max Temperature 35 °F 49 °F 70 °F (1971)
Min Temperature 23 °F 30 °F 4 °F (1979)
Degree Days  
Heating Degree Days 36    
Moisture  
Dew Point 12 °F    
Average Humidity 48    
Maximum Humidity 55    
Minimum Humidity 38    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.02 in    
Wind  
Wind Speed 15 mph (NW)    
Max Wind Speed 25 mph    
Max Gust Speed 36 mph    
Visibility 10 miles    
Events      
Averages and records for this station are not official NWS values.
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Feb. 20, 2013 Rise Set
Actual Time 6:53 AM EST 5:51 PM EST
Civil Twilight 6:26 AM EST 6:18 PM EST
Nautical Twilight 5:55 AM EST 6:50 PM EST
Astronomical Twilight 5:24 AM EST 7:21 PM EST
Moon 1:12 PM EST (2/20) 3:10 AM EST (2/20)
Length of Visible Light 11h 52m
Length of Day
10h 58m
Waxing Gibbous, 76% of the Moon is Illuminated
Feb 20
Waxing Gibbous
Feb 25
Full
Mar 4
Last Quarter
Mar 11
New
Mar 19
First Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 35.6 °F 25.9 °F 17.6 °F 48% 29.87 in 10.0 mi WNW 16.1 mph 29.9 mph N/A   Partly Cloudy
12:35 AM 35.6 °F 26.6 °F 17.6 °F 48% 29.87 in 10.0 mi NW 13.8 mph 20.7 mph N/A   Partly Cloudy
12:55 AM 35.6 °F 26.6 °F 17.6 °F 48% 29.87 in 10.0 mi WNW 13.8 mph 24.2 mph N/A   Partly Cloudy
1:15 AM 33.8 °F 23.2 °F 17.6 °F 52% 29.88 in 10.0 mi WNW 17.3 mph 24.2 mph N/A   Partly Cloudy
1:35 AM 33.8 °F 23.5 °F 17.6 °F 52% 29.88 in 10.0 mi NW 16.1 mph 21.9 mph N/A   Mostly Cloudy
1:55 AM 33.8 °F 23.2 °F 17.6 °F 52% 29.88 in 10.0 mi NW 17.3 mph - N/A   Mostly Cloudy
2:15 AM 33.8 °F 21.0 °F 17.6 °F 52% 29.88 in 10.0 mi NW 25.3 mph 31.1 mph N/A   Partly Cloudy
2:35 AM 33.8 °F 23.2 °F 15.8 °F 48% 29.89 in 10.0 mi NW 17.3 mph 26.5 mph N/A   Scattered Clouds
2:55 AM 33.8 °F 23.5 °F 15.8 °F 48% 29.89 in 10.0 mi NW 16.1 mph 23.0 mph N/A   Scattered Clouds
3:15 AM 32.0 °F 25.6 °F 15.8 °F 51% 29.90 in 10.0 mi NNW 6.9 mph 25.3 mph N/A   Scattered Clouds
3:35 AM 30.2 °F 18.9 °F 14.0 °F 51% 29.91 in 10.0 mi NW 16.1 mph 27.6 mph N/A   Scattered Clouds
3:55 AM 30.2 °F 18.5 °F 14.0 °F 51% 29.91 in 10.0 mi NW 17.3 mph 23.0 mph N/A   Partly Cloudy
4:15 AM 30.2 °F 18.9 °F 12.2 °F 47% 29.91 in 10.0 mi NW 16.1 mph 23.0 mph N/A   Clear
4:35 AM 30.2 °F 18.1 °F 12.2 °F 47% 29.92 in 10.0 mi NW 18.4 mph - N/A   Partly Cloudy
4:55 AM 30.2 °F 17.8 °F 12.2 °F 47% 29.93 in 10.0 mi WNW 19.6 mph 35.7 mph N/A   Mostly Cloudy
5:15 AM 30.2 °F 18.1 °F 12.2 °F 47% 29.94 in 10.0 mi NW 18.4 mph 24.2 mph N/A   Overcast
5:35 AM 30.2 °F 18.5 °F 12.2 °F 47% 29.95 in 10.0 mi NNW 17.3 mph 25.3 mph N/A   Mostly Cloudy
5:55 AM 30.2 °F 20.8 °F 12.2 °F 47% 29.95 in 10.0 mi NNW 11.5 mph 20.7 mph N/A   Mostly Cloudy
6:15 AM 28.4 °F 18.0 °F 10.4 °F 47% 29.96 in 10.0 mi NW 12.7 mph - N/A   Mostly Cloudy
6:35 AM 28.4 °F 16.6 °F 10.4 °F 47% 29.98 in 10.0 mi NW 16.1 mph 23.0 mph N/A   Mostly Cloudy
6:55 AM 28.4 °F 19.1 °F 12.2 °F 51% 29.98 in 10.0 mi NNW 10.4 mph 19.6 mph N/A   Mostly Cloudy
7:15 AM 28.4 °F 19.1 °F 12.2 °F 51% 30.00 in 10.0 mi WNW 10.4 mph 18.4 mph N/A   Overcast
7:35 AM 28.4 °F 18.0 °F 12.2 °F 51% 30.00 in 10.0 mi NW 12.7 mph 18.4 mph N/A   Overcast
7:55 AM 28.4 °F 16.6 °F 12.2 °F 51% 30.01 in 10.0 mi NW 16.1 mph 25.3 mph N/A   Overcast
8:15 AM 28.4 °F 17.5 °F 10.4 °F 47% 30.01 in 10.0 mi NW 13.8 mph 26.5 mph N/A   Mostly Cloudy
8:35 AM 28.4 °F 18.0 °F 10.4 °F 47% 30.01 in 10.0 mi NNW 12.7 mph 27.6 mph N/A   Mostly Cloudy
8:55 AM 28.4 °F 18.0 °F 10.4 °F 47% 30.02 in 10.0 mi NW 12.7 mph 21.9 mph N/A   Scattered Clouds
9:15 AM 28.4 °F 15.8 °F 12.2 °F 51% 30.02 in 10.0 mi NW 18.4 mph 25.3 mph N/A   Scattered Clouds
9:35 AM 28.4 °F 14.4 °F 12.2 °F 51% 30.01 in 10.0 mi NW 23.0 mph 29.9 mph N/A   Partly Cloudy
9:55 AM 28.4 °F 16.6 °F 12.2 °F 51% 30.02 in 10.0 mi NW 16.1 mph 25.3 mph N/A   Scattered Clouds
10:15 AM 30.2 °F 18.9 °F 12.2 °F 47% 30.02 in 10.0 mi NW 16.1 mph 24.2 mph N/A   Scattered Clouds
10:35 AM 30.2 °F 19.8 °F 14.0 °F 51% 30.03 in 10.0 mi WNW 13.8 mph 23.0 mph N/A   Scattered Clouds
10:55 AM 30.2 °F 21.3 °F 12.2 °F 47% 30.03 in 10.0 mi NW 10.4 mph 23.0 mph N/A   Mostly Cloudy
11:15 AM 30.2 °F 20.2 °F 12.2 °F 47% 30.03 in 10.0 mi NW 12.7 mph 19.6 mph N/A   Mostly Cloudy
11:35 AM 30.2 °F 19.3 °F 14.0 °F 51% 30.03 in 10.0 mi WNW 15.0 mph 20.7 mph N/A   Mostly Cloudy
11:55 AM 30.2 °F 17.4 °F 14.0 °F 51% 30.02 in 10.0 mi NW 20.7 mph 26.5 mph N/A   Mostly Cloudy
12:15 PM 30.2 °F 18.9 °F 14.0 °F 51% 30.02 in 10.0 mi NW 16.1 mph 24.2 mph N/A   Mostly Cloudy
12:35 PM 30.2 °F 19.3 °F 14.0 °F 51% 30.02 in 10.0 mi NW 15.0 mph 23.0 mph N/A   Mostly Cloudy
12:55 PM 30.2 °F 19.3 °F 15.8 °F 55% 30.01 in 10.0 mi NW 15.0 mph - N/A   Mostly Cloudy
1:15 PM 30.2 °F 22.6 °F 14.0 °F 51% 30.02 in 10.0 mi NW 8.1 mph 20.7 mph N/A   Overcast
1:35 PM 30.2 °F 21.3 °F 14.0 °F 51% 30.02 in 10.0 mi NW 10.4 mph 21.9 mph N/A   Overcast
1:55 PM 30.2 °F 20.2 °F 12.2 °F 47% 30.02 in 10.0 mi NNW 12.7 mph 25.3 mph N/A   Overcast
2:15 PM 32.0 °F 22.5 °F 12.2 °F 44% 30.02 in 10.0 mi NW 12.7 mph 28.8 mph N/A   Mostly Cloudy
2:35 PM 32.0 °F 22.1 °F 12.2 °F 44% 30.01 in 10.0 mi NW 13.8 mph 21.9 mph N/A   Mostly Cloudy
2:55 PM 33.8 °F 23.5 °F 15.8 °F 48% 30.02 in 10.0 mi NNW 16.1 mph 21.9 mph N/A   Mostly Cloudy
3:35 PM 33.8 °F 24.3 °F 12.2 °F 41% 30.03 in 10.0 mi NNW 13.8 mph 21.9 mph N/A   Overcast
3:55 PM 33.8 °F 24.3 °F 10.4 °F 38% 30.04 in 10.0 mi NW 13.8 mph 28.8 mph N/A   Mostly Cloudy
4:15 PM 32.0 °F 21.6 °F 12.2 °F 44% 30.05 in 10.0 mi NNW 15.0 mph - N/A   Overcast
4:35 PM 32.0 °F 22.5 °F 12.2 °F 44% 30.06 in 10.0 mi NW 12.7 mph 19.6 mph N/A   Overcast
4:55 PM 30.2 °F 18.5 °F 10.4 °F 44% 30.06 in 10.0 mi NNW 17.3 mph 21.9 mph N/A   Mostly Cloudy
5:15 PM 30.2 °F 18.5 °F 12.2 °F 47% 30.07 in 10.0 mi NW 17.3 mph 23.0 mph N/A   Scattered Clouds
5:35 PM 28.4 °F 19.7 °F 10.4 °F 47% 30.09 in 10.0 mi NNW 9.2 mph 18.4 mph N/A   Partly Cloudy
5:55 PM 28.4 °F 22.2 °F 10.4 °F 47% 30.10 in 10.0 mi North 5.8 mph - N/A   Mostly Cloudy
6:15 PM 26.6 °F 15.2 °F 8.6 °F 47% 30.11 in 10.0 mi NNW 13.8 mph 21.9 mph N/A   Mostly Cloudy
6:35 PM 26.6 °F 15.7 °F 8.6 °F 47% 30.12 in 10.0 mi NNW 12.7 mph 24.2 mph N/A   Partly Cloudy
6:55 PM 26.6 °F 18.2 °F 8.6 °F 47% 30.13 in 10.0 mi NNW 8.1 mph 24.2 mph N/A   Clear
7:15 PM 24.8 °F 14.6 °F 6.8 °F 46% 30.14 in 10.0 mi NW 10.4 mph 20.7 mph N/A   Clear
7:35 PM 24.8 °F 12.9 °F 6.8 °F 46% 30.14 in 10.0 mi NNW 13.8 mph 27.6 mph N/A   Clear
7:55 PM 24.8 °F 10.7 °F 6.8 °F 46% 30.14 in 10.0 mi NW 19.6 mph 29.9 mph N/A   Clear
8:15 PM 24.8 °F 9.3 °F 6.8 °F 46% 30.13 in 10.0 mi NW 24.2 mph 27.6 mph N/A   Clear
8:35 PM 24.8 °F 13.4 °F 6.8 °F 46% 30.14 in 10.0 mi NNW 12.7 mph 21.9 mph N/A   Clear
8:55 PM 24.8 °F 12.4 °F 6.8 °F 46% 30.15 in 10.0 mi NW 15.0 mph - N/A   Clear
9:15 PM 24.8 °F 11.9 °F 6.8 °F 46% 30.15 in 10.0 mi NW 16.1 mph 25.3 mph N/A   Clear
9:35 PM 23.0 °F 10.6 °F 6.8 °F 50% 30.16 in 10.0 mi NW 13.8 mph 21.9 mph N/A   Clear
9:55 PM 23.0 °F 11.7 °F 6.8 °F 50% 30.15 in 10.0 mi NW 11.5 mph 26.5 mph N/A   Clear
10:15 PM 23.0 °F 8.3 °F 6.8 °F 50% 30.16 in 10.0 mi NW 19.6 mph 24.2 mph N/A   Scattered Clouds
10:35 PM 23.0 °F 11.1 °F 8.6 °F 54% 30.17 in 10.0 mi NW 12.7 mph 25.3 mph N/A   Partly Cloudy
10:55 PM 23.0 °F 12.4 °F 8.6 °F 54% 30.17 in 10.0 mi NW 10.4 mph 23.0 mph N/A   Scattered Clouds
11:15 PM 23.0 °F 10.6 °F 8.6 °F 54% 30.16 in 10.0 mi NW 13.8 mph 24.2 mph N/A   Scattered Clouds
11:35 PM 23.0 °F 12.4 °F 8.6 °F 54% 30.16 in 10.0 mi NW 10.4 mph 17.3 mph N/A   Clear
11:55 PM 23.0 °F 10.1 °F 6.8 °F 50% 30.15 in 10.0 mi NW 15.0 mph 24.2 mph N/A   Clear