Gaithersburg, MD

11:40 PM EST on November 19, 2019 (GMT -0500)
Montgomery County

Weather History for KGAI - September, 2019

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Sunday, September 15, 2019

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 72 °F -  
Max Temperature 84 °F 82 °F 92 °F (1970)
Min Temperature 61 °F 59 °F 42 °F (1964)
Cooling Degree Days 8    
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 62 °F    
Average Humidity 74    
Maximum Humidity 100    
Minimum Humidity 37    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.20 in    
Wind  
Wind Speed 1 mph (NW)    
Max Wind Speed 8 mph    
Max Gust Speed -    
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

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

Sep. 15, 2019 Rise Set
Actual Time 6:49 AM EDT 7:17 PM EDT
Civil Twilight 6:22 AM EDT 7:44 PM EDT
Nautical Twilight 5:51 AM EDT 8:15 PM EDT
Astronomical Twilight 5:18 AM EDT 8:48 PM EDT
Moon 8:24 PM EDT (9/15) 7:57 AM EDT (9/15)
Length of Visible Light 13h 21m
Length of Day
12h 27m
Full, 98% of the Moon is Illuminated
Sep 15
Full
Sep 21
Last Quarter
Sep 28
New
Oct 5
First Quarter
Oct 13
Full

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 73.9 °F - 68.0 °F 82% 30.20 in 10.0 mi Calm Calm - N/A   Overcast
1:29 AM 73.4 °F - 68.0 °F 83% 30.18 in 10.0 mi Calm Calm - N/A   Overcast
1:56 AM 73.9 °F - 68.0 °F 82% 30.21 in 10.0 mi Calm Calm - N/A   Overcast
2:56 AM 73.0 °F - 68.0 °F 84% 30.21 in 10.0 mi Calm Calm - N/A   Overcast
3:56 AM 71.1 °F - 68.0 °F 90% 30.21 in 10.0 mi West 4.6 mph - N/A   Overcast
4:56 AM 70.0 °F - 66.9 °F 90% 30.22 in 10.0 mi NW 4.6 mph - N/A   Overcast
5:19 AM 69.8 °F - 66.2 °F 88% 30.19 in 10.0 mi NW 4.6 mph - N/A   Partly Cloudy
5:56 AM 68.0 °F - 66.9 °F 96% 30.23 in 6.0 mi Calm Calm - N/A   Clear
6:19 AM 68.0 °F - 66.2 °F 94% 30.19 in 9.0 mi Calm Calm - N/A   Scattered Clouds
6:31 AM 66.2 °F - 66.2 °F 100% 30.19 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
6:49 AM 66.2 °F - 64.4 °F 94% 30.20 in 7.0 mi Calm Calm - N/A   Partly Cloudy
6:56 AM 66.0 °F - 64.9 °F 96% 30.23 in 8.0 mi Calm Calm - N/A   Clear
7:56 AM 66.9 °F - 64.9 °F 93% 30.24 in 10.0 mi Calm Calm - N/A   Clear
8:56 AM 71.1 °F - 64.9 °F 81% 30.24 in 10.0 mi Variable 3.5 mph - N/A   Clear
9:56 AM 73.0 °F - 61.0 °F 66% 30.26 in 10.0 mi Variable 4.6 mph - N/A   Clear
10:56 AM 77.0 °F - 61.0 °F 58% 30.25 in 10.0 mi Variable 6.9 mph - N/A   Clear
11:56 AM 79.0 °F - 57.9 °F 48% 30.24 in 10.0 mi Calm Calm - N/A   Clear
12:56 PM 80.1 °F 80.6 °F 57.9 °F 47% 30.22 in 10.0 mi WNW 8.1 mph - N/A   Clear
1:56 PM 82.0 °F 81.3 °F 54.0 °F 38% 30.20 in 10.0 mi Variable 3.5 mph - N/A   Clear
2:56 PM 82.0 °F 81.7 °F 57.0 °F 42% 30.18 in 10.0 mi WNW 5.8 mph - N/A   Clear
3:56 PM 82.9 °F 81.9 °F 54.0 °F 37% 30.17 in 10.0 mi Calm Calm - N/A   Clear
4:56 PM 82.0 °F 81.6 °F 55.9 °F 41% 30.16 in 10.0 mi Calm Calm - N/A   Clear
5:56 PM 82.0 °F 82.0 °F 57.9 °F 44% 30.15 in 10.0 mi Calm Calm - N/A   Clear
6:56 PM 78.1 °F - 57.0 °F 48% 30.16 in 10.0 mi East 3.5 mph - N/A   Clear
7:56 PM 70.0 °F - 62.1 °F 76% 30.15 in 10.0 mi Calm Calm - N/A   Clear
8:56 PM 66.9 °F - 60.1 °F 79% 30.16 in 10.0 mi Calm Calm - N/A   Clear
9:56 PM 64.0 °F - 60.1 °F 87% 30.15 in 10.0 mi Calm Calm - N/A   Clear
10:56 PM 63.0 °F - 59.0 °F 87% 30.16 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 61.0 °F - 57.9 °F 90% 30.16 in 9.0 mi Calm Calm - N/A   Clear