Gaithersburg, MD

2:18 PM EST on November 12, 2019 (GMT -0500)
Montgomery County

Weather History for KGAI - September, 2019

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Wednesday, September 11, 2019

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 80 °F -  
Max Temperature 93 °F 82 °F 99 °F (1983)
Min Temperature 68 °F 58 °F 44 °F (1967)
Cooling Degree Days 14    
Growing Degree Days 30 (Base 50)    
Moisture  
Dew Point 68 °F    
Average Humidity 76    
Maximum Humidity 94    
Minimum Humidity 47    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.21 in    
Wind  
Wind Speed 4 mph (SSW)    
Max Wind Speed 6 mph    
Max Gust Speed -    
Visibility 10 miles    
Events Thunderstorm    
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. 11, 2019 Rise Set
Actual Time 6:46 AM EDT 7:23 PM EDT
Civil Twilight 6:19 AM EDT 7:50 PM EDT
Nautical Twilight 5:47 AM EDT 8:22 PM EDT
Astronomical Twilight 5:14 AM EDT 8:55 PM EDT
Moon 6:33 PM EDT (9/11) 4:08 AM EDT (9/11)
Length of Visible Light 13h 31m
Length of Day
12h 37m
Waxing Gibbous, 94% of the Moon is Illuminated
Sep 11
Waxing Gibbous
Sep 14
Full
Sep 21
Last Quarter
Sep 28
New
Oct 5
First Quarter

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 71.1 °F - 64.9 °F 81% 30.31 in 10.0 mi South 3.5 mph - N/A   Clear
1:56 AM 70.0 °F - 64.9 °F 84% 30.31 in 10.0 mi South 4.6 mph - N/A   Clear
2:56 AM 69.1 °F - 64.9 °F 87% 30.29 in 10.0 mi South 3.5 mph - N/A   Clear
3:56 AM 69.1 °F - 64.9 °F 87% 30.28 in 10.0 mi South 5.8 mph - N/A   Clear
4:56 AM 68.0 °F - 66.0 °F 93% 30.27 in 10.0 mi South 5.8 mph - N/A   Clear
5:56 AM 68.0 °F - 64.9 °F 90% 30.28 in 10.0 mi Calm Calm - N/A   Clear
6:29 AM 68.0 °F - 66.2 °F 94% 30.25 in 10.0 mi SSE 3.5 mph - N/A   Mostly Cloudy
6:50 AM 68.0 °F - 66.2 °F 94% 30.25 in 10.0 mi South 4.6 mph - N/A   Overcast
6:56 AM 68.0 °F - 66.0 °F 93% 30.28 in 10.0 mi Calm Calm - N/A   Overcast
7:56 AM 70.0 °F - 66.9 °F 90% 30.29 in 10.0 mi Variable 4.6 mph - N/A   Overcast
8:56 AM 71.1 °F - 68.0 °F 90% 30.30 in 10.0 mi SSW 5.8 mph - N/A   Overcast
9:56 AM 75.9 °F - 69.1 °F 79% 30.28 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
10:08 AM 75.2 °F - 69.8 °F 83% 30.25 in 10.0 mi SW 3.5 mph - N/A   Partly Cloudy
10:56 AM 81.0 °F 84.4 °F 70.0 °F 69% 30.27 in 10.0 mi Variable 3.5 mph - N/A   Clear
11:56 AM 84.0 °F 89.6 °F 72.0 °F 67% 30.25 in 10.0 mi WNW 5.8 mph - N/A   Clear
12:56 PM 88.0 °F 94.7 °F 72.0 °F 59% 30.22 in 10.0 mi SSW 4.6 mph - N/A   Clear
1:56 PM 90.0 °F 96.4 °F 71.1 °F 54% 30.19 in 10.0 mi Variable 3.5 mph - N/A   Clear
2:56 PM 91.0 °F 96.6 °F 70.0 °F 50% 30.16 in 10.0 mi Calm Calm - N/A   Clear
3:56 PM 91.9 °F 96.9 °F 69.1 °F 47% 30.13 in 10.0 mi Variable 3.5 mph - N/A   Clear
4:56 PM 89.1 °F 93.7 °F 69.1 °F 52% 30.12 in 10.0 mi SW 4.6 mph - N/A   Clear
5:11 PM 87.8 °F 92.6 °F 69.8 °F 55% 30.10 in 10.0 mi South 4.6 mph - N/A Thunderstorm Clear
5:29 PM 84.2 °F 88.4 °F 69.8 °F 62% 30.09 in 10.0 mi SW 5.8 mph - N/A   Clear
5:56 PM 82.9 °F 87.5 °F 71.1 °F 67% 30.13 in 10.0 mi WSW 4.6 mph - N/A   Clear
6:56 PM 80.1 °F 82.9 °F 69.1 °F 69% 30.14 in 10.0 mi WSW 4.6 mph - N/A   Clear
7:56 PM 77.0 °F - 69.1 °F 76% 30.14 in 10.0 mi West 5.8 mph - N/A   Clear
8:56 PM 75.0 °F - 68.0 °F 79% 30.15 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
9:56 PM 73.0 °F - 68.0 °F 84% 30.14 in 10.0 mi Calm Calm - N/A   Clear
10:56 PM 71.1 °F - 66.9 °F 87% 30.14 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 70.0 °F - 66.9 °F 90% 30.13 in 10.0 mi Calm Calm - N/A   Clear