Gaithersburg, MD

12:15 AM EDT on October 18, 2019 (GMT -0400)
Montgomery County

Weather History for KGAI - September, 2019

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Monday, September 16, 2019

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 74 °F -  
Max Temperature 90 °F 80 °F 96 °F (1970)
Min Temperature 59 °F 58 °F 44 °F (1985)
Cooling Degree Days 9    
Growing Degree Days 24 (Base 50)    
Moisture  
Dew Point 62 °F    
Average Humidity 69    
Maximum Humidity 97    
Minimum Humidity 40    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.09 in    
Wind  
Wind Speed 1 mph (ESE)    
Max Wind Speed 5 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. 16, 2019 Rise Set
Actual Time 6:50 AM EDT 7:15 PM EDT
Civil Twilight 6:23 AM EDT 7:42 PM EDT
Nautical Twilight 5:52 AM EDT 8:14 PM EDT
Astronomical Twilight 5:19 AM EDT 8:46 PM EDT
Moon 8:50 PM EDT (9/16) 8:55 AM EDT (9/16)
Length of Visible Light 13h 18m
Length of Day
12h 25m
Waning Gibbous, 94% of the Moon is Illuminated
Sep 16
Waning Gibbous
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 61.0 °F - 59.0 °F 93% 30.15 in 10.0 mi Calm Calm - N/A   Clear
1:56 AM 60.1 °F - 57.9 °F 93% 30.15 in 10.0 mi Calm Calm - N/A   Clear
2:56 AM 60.1 °F - 59.0 °F 96% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:56 AM 62.1 °F - 60.1 °F 93% 30.13 in 10.0 mi Calm Calm - N/A   Overcast
5:56 AM 60.1 °F - 59.0 °F 96% 30.13 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:56 AM 59.0 °F - 57.9 °F 96% 30.12 in 10.0 mi Calm Calm - N/A   Clear
7:56 AM 61.0 °F - 60.1 °F 97% 30.13 in 10.0 mi Calm Calm - N/A   Clear
8:56 AM 70.0 °F - 63.0 °F 78% 30.13 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:56 AM 75.0 °F - 62.1 °F 64% 30.14 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:56 AM 78.1 °F - 62.1 °F 58% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:56 AM 82.9 °F 84.0 °F 63.0 °F 51% 30.11 in 10.0 mi SE 3.5 mph - N/A   Clear
12:56 PM 86.0 °F 87.3 °F 64.0 °F 48% 30.10 in 10.0 mi Variable 3.5 mph - N/A   Clear
1:56 PM 86.0 °F 86.3 °F 62.1 °F 44% 30.07 in 10.0 mi East 3.5 mph - N/A   Clear
2:56 PM 89.1 °F 89.3 °F 62.1 °F 40% 30.04 in 10.0 mi ESE 4.6 mph - N/A   Clear
3:56 PM 88.0 °F 88.4 °F 62.1 °F 42% 30.02 in 10.0 mi Calm Calm - N/A   Clear
4:56 PM 87.1 °F 87.0 °F 61.0 °F 41% 30.01 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:56 PM 84.0 °F 85.8 °F 64.9 °F 53% 30.01 in 10.0 mi Calm Calm - N/A   Overcast
6:56 PM 82.0 °F 83.4 °F 64.0 °F 54% 30.02 in 10.0 mi Variable 3.5 mph - N/A   Overcast
7:56 PM 77.0 °F - 64.9 °F 66% 30.03 in 10.0 mi Calm Calm - N/A   Clear
8:56 PM 75.9 °F - 64.0 °F 67% 30.04 in 10.0 mi Calm Calm - N/A   Overcast
9:56 PM 75.0 °F - 64.0 °F 69% 30.05 in 10.0 mi Variable 3.5 mph - N/A   Overcast
10:56 PM 72.0 °F - 64.0 °F 76% 30.06 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:56 PM 72.0 °F - 64.0 °F 76% 30.07 in 10.0 mi Calm Calm - N/A   Overcast