Weather History for Gaithersburg, MD

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Monday, February 18, 2013

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 29 °F -  
Max Temperature 41 °F 44 °F 77 °F (2011)
Min Temperature 17 °F 27 °F -2 °F (1979)
Degree Days  
Heating Degree Days 36    
Moisture  
Dew Point 7 °F    
Average Humidity 41    
Maximum Humidity 58    
Minimum Humidity 26    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.28 in    
Wind  
Wind Speed 10 mph (West)    
Max Wind Speed 18 mph    
Max Gust Speed 30 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. 18, 2013 Rise Set
Actual Time 6:56 AM EST 5:49 PM EST
Civil Twilight 6:28 AM EST 6:16 PM EST
Nautical Twilight 5:57 AM EST 6:47 PM EST
Astronomical Twilight 5:26 AM EST 7:18 PM EST
Moon 11:35 AM EST (2/18) 1:32 AM EST (2/18)
Length of Visible Light 11h 47m
Length of Day
10h 53m
First Quarter, 58% of the Moon is Illuminated
Feb 18
First Quarter
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 21.2 °F 8.9 °F 3.2 °F 46% 30.21 in 10.0 mi NW 12.7 mph 29.9 mph N/A   Clear
12:35 AM 21.2 °F 9.5 °F 3.2 °F 46% 30.22 in 10.0 mi NW 11.5 mph 24.2 mph N/A   Clear
12:55 AM 21.2 °F 6.4 °F 3.2 °F 46% 30.23 in 10.0 mi NW 18.4 mph 21.9 mph N/A   Clear
1:15 AM 21.2 °F 7.8 °F 3.2 °F 46% 30.23 in 10.0 mi NW 15.0 mph 20.7 mph N/A   Clear
1:35 AM 21.2 °F 8.9 °F 3.2 °F 46% 30.23 in 10.0 mi NNW 12.7 mph 27.6 mph N/A   Clear
1:55 AM 19.4 °F 6.0 °F 3.2 °F 49% 30.23 in 10.0 mi NW 13.8 mph 21.9 mph N/A   Clear
2:15 AM 19.4 °F 7.2 °F 3.2 °F 49% 30.24 in 10.0 mi NW 11.5 mph 17.3 mph N/A   Clear
2:35 AM 19.4 °F 6.6 °F 3.2 °F 49% 30.24 in 10.0 mi NW 12.7 mph 21.9 mph N/A   Clear
2:55 AM 19.4 °F 5.5 °F 3.2 °F 49% 30.25 in 10.0 mi NW 15.0 mph - N/A   Clear
3:15 AM 19.4 °F 11.5 °F 3.2 °F 49% 30.26 in 10.0 mi NW 5.8 mph - N/A   Clear
3:35 AM 19.4 °F 6.6 °F 3.2 °F 49% 30.26 in 10.0 mi WNW 12.7 mph 17.3 mph N/A   Clear
3:55 AM 19.4 °F 4.1 °F 3.2 °F 49% 30.25 in 10.0 mi NW 18.4 mph 21.9 mph N/A   Clear
4:15 AM 19.4 °F 7.2 °F 3.2 °F 49% 30.26 in 10.0 mi NW 11.5 mph - N/A   Clear
4:35 AM 19.4 °F 7.9 °F 3.2 °F 49% 30.27 in 10.0 mi NW 10.4 mph 17.3 mph N/A   Clear
4:55 AM 19.4 °F 7.9 °F 3.2 °F 49% 30.28 in 10.0 mi NW 10.4 mph - N/A   Clear
5:15 AM 19.4 °F 9.5 °F 3.2 °F 49% 30.29 in 10.0 mi NW 8.1 mph - N/A   Clear
5:35 AM 19.4 °F 14.3 °F 3.2 °F 49% 30.31 in 10.0 mi WNW 3.5 mph - N/A   Clear
5:55 AM 17.6 °F 6.4 °F 3.2 °F 53% 30.31 in 10.0 mi NW 9.2 mph - N/A   Clear
6:15 AM 19.4 °F 9.5 °F 5.0 °F 54% 30.32 in 10.0 mi WNW 8.1 mph - N/A   Clear
6:35 AM 17.6 °F 8.2 °F 5.0 °F 58% 30.33 in 10.0 mi NW 6.9 mph - N/A   Clear
6:55 AM 19.4 °F 14.3 °F 5.0 °F 54% 30.34 in 10.0 mi NW 3.5 mph - N/A   Clear
7:15 AM 17.6 °F 10.7 °F 5.0 °F 58% 30.35 in 10.0 mi NW 4.6 mph - N/A   Clear
7:35 AM 19.4 °F 12.8 °F 5.0 °F 54% 30.35 in 10.0 mi NW 4.6 mph - N/A   Clear
7:55 AM 19.4 °F 7.9 °F 6.8 °F 58% 30.35 in 10.0 mi NW 10.4 mph - N/A   Clear
8:15 AM 21.2 °F 12.6 °F 6.8 °F 54% 30.36 in 10.0 mi NW 6.9 mph - N/A   Clear
8:35 AM 21.2 °F 9.5 °F 6.8 °F 54% 30.38 in 10.0 mi NW 11.5 mph 16.1 mph N/A   Clear
8:55 AM 23.0 °F 11.1 °F 6.8 °F 50% 30.39 in 10.0 mi NW 12.7 mph 16.1 mph N/A   Clear
9:15 AM 24.8 °F 12.9 °F 6.8 °F 46% 30.38 in 10.0 mi WNW 13.8 mph 17.3 mph N/A   Clear
9:35 AM 24.8 °F 14.0 °F 6.8 °F 46% 30.38 in 10.0 mi WNW 11.5 mph 17.3 mph N/A   Clear
9:55 AM 26.6 °F 15.7 °F 6.8 °F 43% 30.38 in 10.0 mi NW 12.7 mph 18.4 mph N/A   Clear
10:15 AM 26.6 °F 16.8 °F 6.8 °F 43% 30.37 in 10.0 mi NW 10.4 mph - N/A   Clear
10:35 AM 28.4 °F 21.2 °F 8.6 °F 43% 30.37 in 10.0 mi NNW 6.9 mph - N/A   Clear
10:55 AM 28.4 °F 21.2 °F 6.8 °F 40% 30.37 in 10.0 mi NNW 6.9 mph - N/A   Clear
11:15 AM 28.4 °F 20.4 °F 8.6 °F 43% 30.36 in 10.0 mi WNW 8.1 mph - N/A   Clear
11:35 AM 30.2 °F 24.3 °F 6.8 °F 37% 30.36 in 10.0 mi West 5.8 mph - N/A   Clear
11:55 AM 30.2 °F 24.3 °F 6.8 °F 37% 30.35 in 10.0 mi NW 5.8 mph - N/A   Clear
12:15 PM 32.0 °F 26.4 °F 6.8 °F 35% 30.34 in 10.0 mi NW 5.8 mph - N/A   Clear
12:35 PM 33.8 °F 27.7 °F 6.8 °F 32% 30.33 in 10.0 mi West 6.9 mph - N/A   Clear
12:55 PM 33.8 °F - 8.6 °F 35% 30.32 in 10.0 mi Calm Calm - N/A   Clear
1:15 PM 33.8 °F 27.0 °F 8.6 °F 35% 30.30 in 10.0 mi WSW 8.1 mph - N/A   Clear
1:35 PM 35.6 °F 32.8 °F 8.6 °F 33% 30.30 in 10.0 mi SW 3.5 mph - N/A   Clear
1:55 PM 37.4 °F 34.9 °F 8.6 °F 30% 30.29 in 10.0 mi WNW 3.5 mph - N/A   Clear
2:15 PM 35.6 °F 32.8 °F 8.6 °F 33% 30.28 in 10.0 mi WSW 3.5 mph - N/A   Clear
2:35 PM 37.4 °F 32.1 °F 8.6 °F 30% 30.27 in 10.0 mi WSW 6.9 mph - N/A   Clear
2:55 PM 39.2 °F 35.9 °F 6.8 °F 26% 30.26 in 10.0 mi SW 4.6 mph - N/A   Clear
3:15 PM 39.2 °F 35.0 °F 8.6 °F 28% 30.26 in 10.0 mi South 5.8 mph - N/A   Clear
3:35 PM 39.2 °F 35.0 °F 8.6 °F 28% 30.26 in 10.0 mi WSW 5.8 mph - N/A   Clear
3:55 PM 39.2 °F 37.0 °F 8.6 °F 28% 30.25 in 10.0 mi WSW 3.5 mph - N/A   Clear
4:15 PM 41.0 °F 37.1 °F 8.6 °F 26% 30.24 in 10.0 mi WSW 5.8 mph - N/A   Clear
4:35 PM 41.0 °F 35.8 °F 8.6 °F 26% 30.24 in 10.0 mi SW 8.1 mph - N/A   Clear
4:55 PM 39.2 °F 35.0 °F 8.6 °F 28% 30.24 in 10.0 mi WSW 5.8 mph - N/A   Clear
5:15 PM 39.2 °F 35.9 °F 8.6 °F 28% 30.24 in 10.0 mi SW 4.6 mph - N/A   Clear
5:35 PM 39.2 °F 35.9 °F 8.6 °F 28% 30.25 in 10.0 mi South 4.6 mph - N/A   Clear
6:15 PM 35.6 °F 30.7 °F 8.6 °F 33% 30.25 in 10.0 mi South 5.8 mph - N/A   Clear
6:35 PM 35.6 °F 30.7 °F 8.6 °F 33% 30.25 in 10.0 mi SSE 5.8 mph - N/A   Clear
6:55 PM 33.8 °F 27.7 °F 10.4 °F 38% 30.25 in 10.0 mi SSE 6.9 mph - N/A   Clear
7:15 PM 33.8 °F 28.6 °F 10.4 °F 38% 30.24 in 10.0 mi SSE 5.8 mph - N/A   Clear
7:35 PM 33.8 °F 27.0 °F 10.4 °F 38% 30.24 in 10.0 mi SSE 8.1 mph - N/A   Clear
7:55 PM 33.8 °F 26.4 °F 10.4 °F 38% 30.23 in 10.0 mi SSE 9.2 mph - N/A   Clear
8:15 PM 33.8 °F 27.7 °F 10.4 °F 38% 30.23 in 10.0 mi SSE 6.9 mph - N/A   Clear
8:35 PM 33.8 °F 27.0 °F 10.4 °F 38% 30.22 in 10.0 mi South 8.1 mph - N/A   Clear
8:55 PM 33.8 °F 27.0 °F 10.4 °F 38% 30.22 in 10.0 mi SSE 8.1 mph - N/A   Clear
9:15 PM 35.6 °F 29.9 °F 10.4 °F 35% 30.21 in 10.0 mi South 6.9 mph - N/A   Clear
9:35 PM 35.6 °F 29.2 °F 10.4 °F 35% 30.21 in 10.0 mi South 8.1 mph - N/A   Clear
9:55 PM 35.6 °F 29.2 °F 10.4 °F 35% 30.20 in 10.0 mi South 8.1 mph - N/A   Clear
10:15 PM 35.6 °F 29.2 °F 10.4 °F 35% 30.20 in 10.0 mi South 8.1 mph - N/A   Clear
10:35 PM 35.6 °F 29.9 °F 10.4 °F 35% 30.20 in 10.0 mi South 6.9 mph - N/A   Clear
10:55 PM 35.6 °F 30.7 °F 10.4 °F 35% 30.19 in 10.0 mi South 5.8 mph - N/A   Clear
11:15 PM 33.8 °F 27.7 °F 12.2 °F 41% 30.18 in 10.0 mi South 6.9 mph - N/A   Clear
11:35 PM 33.8 °F 27.0 °F 12.2 °F 41% 30.18 in 10.0 mi SSE 8.1 mph - N/A   Clear
11:55 PM 35.6 °F 30.7 °F 14.0 °F 41% 30.17 in 10.0 mi South 5.8 mph - N/A   Clear