Weather History for Gaithersburg, MD

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Thursday, January 31, 2013

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 42 °F -  
Max Temperature 57 °F 44 °F 66 °F (1974)
Min Temperature 26 °F 26 °F -3 °F (1965)
Degree Days  
Heating Degree Days 24    
Moisture  
Dew Point 25 °F    
Average Humidity 56    
Maximum Humidity 100    
Minimum Humidity 36    
Precipitation  
Precipitation 0.46 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.61 in    
Wind  
Wind Speed 14 mph (WNW)    
Max Wind Speed 34 mph    
Max Gust Speed 46 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

Jan. 31, 2013 Rise Set
Actual Time 7:16 AM EST 5:28 PM EST
Civil Twilight 6:47 AM EST 5:56 PM EST
Nautical Twilight 6:15 AM EST 6:29 PM EST
Astronomical Twilight 5:44 AM EST 7:00 PM EST
Moon 10:26 PM EST (1/31) 9:16 AM EST (1/31)
Length of Visible Light 11h 09m
Length of Day
10h 12m
Waning Gibbous, 80% of the Moon is Illuminated
Jan 31
Waning Gibbous
Feb 3
Last Quarter
Feb 10
New
Feb 17
First Quarter
Feb 25
Full

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 55.4 °F - 53.6 °F 94% 29.25 in 10.0 mi SE 3.5 mph - 0.07 in   Overcast
12:35 AM 55.4 °F - 55.4 °F 100% 29.23 in 8.0 mi Calm Calm - 0.10 in   Overcast
12:55 AM 55.4 °F - 53.6 °F 94% 29.20 in 7.0 mi West 3.5 mph - 0.16 in   Overcast
1:15 AM 57.2 °F - 55.4 °F 94% 29.23 in 5.0 mi WNW 11.5 mph - 0.16 in   Overcast
1:35 AM 57.2 °F - 55.4 °F 94% 29.25 in 9.0 mi WNW 9.2 mph - 0.21 in   Mostly Cloudy
1:55 AM 57.2 °F - 55.4 °F 94% 29.25 in 9.0 mi West 12.7 mph 23.0 mph 0.27 in   Overcast
2:15 AM 55.4 °F - 53.6 °F 94% 29.22 in 10.0 mi West 5.8 mph - 0.01 in   Overcast
2:35 AM 55.4 °F - 53.6 °F 94% 29.22 in 10.0 mi West 4.6 mph - 0.01 in   Mostly Cloudy
2:55 AM 55.4 °F - 53.6 °F 94% 29.20 in 10.0 mi SW 8.1 mph - 0.02 in   Mostly Cloudy
3:15 AM 55.4 °F - 51.8 °F 88% 29.19 in 10.0 mi West 8.1 mph 17.3 mph N/A   Mostly Cloudy
3:35 AM 55.4 °F - 51.8 °F 88% 29.22 in 10.0 mi West 9.2 mph - N/A   Mostly Cloudy
3:55 AM 53.6 °F - 46.4 °F 77% 29.24 in 10.0 mi NW 25.3 mph 35.7 mph 0.01 in   Overcast
4:15 AM 51.8 °F - 42.8 °F 71% 29.27 in 10.0 mi NW 21.9 mph 34.5 mph N/A   Overcast
4:35 AM 48.2 °F - 37.4 °F 66% 29.31 in 10.0 mi NW 26.5 mph 35.7 mph N/A   Mostly Cloudy
4:55 AM 46.4 °F 38.1 °F 33.8 °F 62% 29.33 in 10.0 mi NW 24.2 mph 43.7 mph N/A   Overcast
5:15 AM 46.4 °F 38.5 °F 32.0 °F 57% 29.36 in 10.0 mi NW 21.9 mph 35.7 mph N/A   Overcast
5:35 AM 44.6 °F 35.3 °F 30.2 °F 57% 29.38 in 10.0 mi NW 26.5 mph 36.8 mph N/A   Overcast
5:55 AM 44.6 °F 34.9 °F 28.4 °F 53% 29.40 in 10.0 mi WNW 28.8 mph 44.9 mph N/A   Mostly Cloudy
6:15 AM 42.8 °F 34.0 °F 26.6 °F 53% 29.42 in 10.0 mi WNW 20.7 mph 40.3 mph N/A   Mostly Cloudy
6:35 AM 42.8 °F 34.5 °F 26.6 °F 53% 29.46 in 10.0 mi WNW 18.4 mph 27.6 mph N/A   Scattered Clouds
6:55 AM 42.8 °F 31.6 °F 28.4 °F 57% 29.48 in 10.0 mi NW 34.5 mph 46.0 mph N/A   Overcast
7:15 AM 39.2 °F 27.6 °F 24.8 °F 56% 29.51 in 10.0 mi NW 28.8 mph 38.0 mph N/A   Overcast
7:35 AM 39.2 °F 29.6 °F 24.8 °F 56% 29.53 in 10.0 mi WNW 19.6 mph 32.2 mph N/A   Mostly Cloudy
7:55 AM 39.2 °F 30.5 °F 24.8 °F 56% 29.55 in 10.0 mi NW 16.1 mph 26.5 mph N/A   Scattered Clouds
8:15 AM 39.2 °F 29.3 °F 21.2 °F 49% 29.56 in 10.0 mi WNW 20.7 mph 27.6 mph N/A   Scattered Clouds
8:35 AM 39.2 °F 28.7 °F 21.2 °F 49% 29.56 in 10.0 mi NW 23.0 mph 34.5 mph N/A   Clear
8:55 AM 39.2 °F 28.5 °F 21.2 °F 49% 29.58 in 10.0 mi WNW 24.2 mph 34.5 mph N/A   Partly Cloudy
9:15 AM 39.2 °F 28.5 °F 21.2 °F 49% 29.59 in 10.0 mi WNW 24.2 mph 36.8 mph N/A   Partly Cloudy
9:35 AM 39.2 °F 29.6 °F 23.0 °F 52% 29.62 in 7.0 mi West 19.6 mph 33.4 mph N/A   Mostly Cloudy
9:55 AM 39.2 °F 29.6 °F 21.2 °F 49% 29.62 in 10.0 mi WNW 19.6 mph 36.8 mph N/A   Mostly Cloudy
10:15 AM 39.2 °F 28.7 °F 23.0 °F 52% 29.64 in 10.0 mi WNW 23.0 mph 34.5 mph N/A   Mostly Cloudy
10:35 AM 39.2 °F 28.3 °F 19.4 °F 45% 29.64 in 10.0 mi NW 25.3 mph 34.5 mph N/A   Scattered Clouds
10:55 AM 39.2 °F 28.3 °F 19.4 °F 45% 29.65 in 10.0 mi WNW 25.3 mph 35.7 mph N/A   Partly Cloudy
11:15 AM 41.0 °F 32.2 °F 19.4 °F 42% 29.65 in 10.0 mi WNW 18.4 mph 28.8 mph N/A   Clear
11:35 AM 41.0 °F 32.8 °F 19.4 °F 42% 29.66 in 10.0 mi NW 16.1 mph 29.9 mph N/A   Clear
11:55 AM 41.0 °F 31.4 °F 21.2 °F 45% 29.67 in 10.0 mi NW 21.9 mph 33.4 mph N/A   Partly Cloudy
12:15 PM 41.0 °F 31.4 °F 21.2 °F 45% 29.68 in 10.0 mi WNW 21.9 mph 31.1 mph N/A   Partly Cloudy
12:35 PM 39.2 °F 29.6 °F 19.4 °F 45% 29.68 in 10.0 mi WNW 19.6 mph 33.4 mph N/A   Partly Cloudy
12:55 PM 39.2 °F 29.0 °F 15.8 °F 39% 29.69 in 10.0 mi West 21.9 mph 32.2 mph N/A   Scattered Clouds
1:15 PM 39.2 °F 30.2 °F 15.8 °F 39% 29.69 in 10.0 mi West 17.3 mph 31.1 mph N/A   Mostly Cloudy
1:35 PM 39.2 °F 29.3 °F 15.8 °F 39% 29.69 in 10.0 mi NW 20.7 mph 27.6 mph N/A   Mostly Cloudy
1:55 PM 39.2 °F 28.3 °F 14.0 °F 36% 29.69 in 10.0 mi WNW 25.3 mph 32.2 mph N/A   Scattered Clouds
2:15 PM 39.2 °F 27.8 °F 17.6 °F 42% 29.71 in 10.0 mi NW 27.6 mph 36.8 mph N/A   Scattered Clouds
2:35 PM 37.4 °F 26.4 °F 19.4 °F 48% 29.73 in 10.0 mi NW 23.0 mph 34.5 mph N/A   Mostly Cloudy
2:55 PM 37.4 °F 26.9 °F 19.4 °F 48% 29.74 in 10.0 mi NW 20.7 mph 26.5 mph N/A   Mostly Cloudy
3:15 PM 37.4 °F 26.4 °F 17.6 °F 45% 29.74 in 10.0 mi NW 23.0 mph 33.4 mph N/A   Partly Cloudy
3:35 PM 35.6 °F 26.6 °F 15.8 °F 44% 29.76 in 10.0 mi WNW 13.8 mph 34.5 mph N/A   Partly Cloudy
3:55 PM 35.6 °F 27.5 °F 15.8 °F 44% 29.77 in 10.0 mi West 11.5 mph 27.6 mph N/A   Mostly Cloudy
4:15 PM 35.6 °F 23.7 °F 15.8 °F 44% 29.78 in 10.0 mi WNW 24.2 mph 39.1 mph N/A   Mostly Cloudy
4:35 PM 35.6 °F 24.2 °F 17.6 °F 48% 29.79 in 10.0 mi WNW 21.9 mph 27.6 mph N/A   Clear
4:55 PM 35.6 °F 25.9 °F 14.0 °F 41% 29.80 in 10.0 mi West 16.1 mph 24.2 mph N/A   Partly Cloudy
5:15 PM 35.6 °F 24.2 °F 12.2 °F 38% 29.80 in 10.0 mi WNW 21.9 mph 33.4 mph N/A   Partly Cloudy
5:35 PM 35.6 °F 25.5 °F 14.0 °F 41% 29.82 in 10.0 mi West 17.3 mph 28.8 mph N/A   Scattered Clouds
5:55 PM 33.8 °F 22.5 °F 15.8 °F 48% 29.83 in 10.0 mi West 19.6 mph 29.9 mph N/A   Mostly Cloudy
6:15 PM 33.8 °F 23.2 °F 15.8 °F 48% 29.85 in 10.0 mi NNW 17.3 mph 26.5 mph N/A   Mostly Cloudy
6:35 PM 30.2 °F 17.4 °F 17.6 °F 60% 29.87 in 10.0 mi WNW 20.7 mph 31.1 mph N/A   Mostly Cloudy
6:55 PM 30.2 °F 17.1 °F 17.6 °F 60% 29.88 in 10.0 mi WNW 21.9 mph 31.1 mph N/A   Partly Cloudy
7:15 PM 30.2 °F 17.4 °F 14.0 °F 51% 29.90 in 10.0 mi WNW 20.7 mph 28.8 mph N/A   Partly Cloudy
7:35 PM 30.2 °F 17.8 °F 12.2 °F 47% 29.91 in 10.0 mi NW 19.6 mph 25.3 mph N/A   Partly Cloudy
8:15 PM 28.4 °F 18.0 °F 10.4 °F 47% 29.91 in 10.0 mi NW 12.7 mph 20.7 mph N/A   Clear
8:35 PM 28.4 °F 18.5 °F 10.4 °F 47% 29.91 in 10.0 mi NW 11.5 mph 18.4 mph N/A   Clear
8:55 PM 28.4 °F 19.1 °F 10.4 °F 47% 29.91 in 10.0 mi WNW 10.4 mph - N/A   Clear
9:15 PM 28.4 °F 22.2 °F 10.4 °F 47% 29.91 in 10.0 mi WNW 5.8 mph - N/A   Clear
9:35 PM 28.4 °F 23.3 °F 10.4 °F 47% 29.90 in 10.0 mi WNW 4.6 mph - N/A   Clear
10:15 PM 26.6 °F - 10.4 °F 51% 29.91 in 10.0 mi Calm Calm - N/A   Clear
10:35 PM 26.6 °F 22.6 °F 10.4 °F 51% 29.91 in 10.0 mi NW 3.5 mph - N/A   Clear
11:15 PM 28.4 °F 24.6 °F 10.4 °F 47% 29.92 in 10.0 mi WSW 3.5 mph - N/A   Clear
11:35 PM 28.4 °F 24.6 °F 10.4 °F 47% 29.91 in 10.0 mi West 3.5 mph - N/A   Clear
11:55 PM 28.4 °F 23.3 °F 12.2 °F 51% 29.91 in 10.0 mi WNW 4.6 mph - N/A   Clear