Gaithersburg, MD

7:02 AM EDT on October 14, 2019 (GMT -0400)
Montgomery County

Weather History for KGAI - September, 2019

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Tuesday, September 17, 2019

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 69 °F -  
Max Temperature 79 °F 78 °F 99 °F (1991)
Min Temperature 60 °F 58 °F 43 °F (1959)
Cooling Degree Days 4    
Growing Degree Days 19 (Base 50)    
Moisture  
Dew Point 61 °F    
Average Humidity 73    
Maximum Humidity 93    
Minimum Humidity 52    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.13 in    
Wind  
Wind Speed 3 mph (NE)    
Max Wind Speed 7 mph    
Max Gust Speed -    
Visibility 10 miles    
Events Rain    
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. 17, 2019 Rise Set
Actual Time 6:51 AM EDT 7:14 PM EDT
Civil Twilight 6:24 AM EDT 7:40 PM EDT
Nautical Twilight 5:53 AM EDT 8:12 PM EDT
Astronomical Twilight 5:21 AM EDT 8:44 PM EDT
Moon 9:17 PM EDT (9/17) 9:52 AM EDT (9/17)
Length of Visible Light 13h 16m
Length of Day
12h 22m
Waning Gibbous, 89% of the Moon is Illuminated
Sep 17
Waning Gibbous
Sep 21
Last Quarter
Sep 28
New
Oct 5
First Quarter
Oct 13
Full

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 71.1 °F 64.0 °F 78% 30.07 in 10.0 mi NE 3.5 mph - N/A   Overcast
1:56 AM 70.0 °F 63.0 °F 78% 30.07 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:56 AM 69.1 °F 64.0 °F 84% 30.06 in 10.0 mi Variable 4.6 mph - N/A   Overcast
4:56 AM 69.1 °F 64.0 °F 84% 30.06 in 10.0 mi Variable 4.6 mph - N/A   Overcast
5:56 AM 68.0 °F 64.9 °F 90% 30.08 in 10.0 mi Variable 3.5 mph - N/A   Overcast
6:32 AM 68.0 °F 64.4 °F 88% 30.06 in 10.0 mi Variable 5.8 mph - 0.00 in Rain Light Rain
6:56 AM 66.9 °F 64.9 °F 93% 30.10 in 10.0 mi Variable 3.5 mph - 0.00 in   Overcast
7:56 AM 68.0 °F 63.0 °F 84% 30.13 in 10.0 mi Variable 4.6 mph - N/A   Overcast
8:56 AM 68.0 °F 63.0 °F 84% 30.16 in 10.0 mi Variable 3.5 mph - N/A   Overcast
9:09 AM 68.0 °F 62.6 °F 83% 30.13 in 10.0 mi Variable 4.6 mph - N/A   Overcast
9:56 AM 70.0 °F 63.0 °F 78% 30.17 in 10.0 mi Variable 5.8 mph - N/A   Overcast
10:56 AM 73.9 °F 62.1 °F 66% 30.18 in 10.0 mi Variable 5.8 mph - N/A   Overcast
11:56 AM 75.0 °F 61.0 °F 62% 30.19 in 10.0 mi Variable 4.6 mph - N/A   Mostly Cloudy
12:56 PM 77.0 °F 60.1 °F 56% 30.18 in 10.0 mi Variable 4.6 mph - N/A   Overcast
1:56 PM 77.0 °F 61.0 °F 58% 30.17 in 10.0 mi Variable 6.9 mph - N/A   Mostly Cloudy
2:56 PM 78.1 °F 61.0 °F 56% 30.15 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 PM 78.1 °F 59.0 °F 52% 30.14 in 10.0 mi Variable 4.6 mph - N/A   Partly Cloudy
4:56 PM 78.1 °F 60.1 °F 54% 30.13 in 10.0 mi NE 6.9 mph - N/A   Scattered Clouds
5:56 PM 77.0 °F 57.9 °F 52% 30.13 in 10.0 mi Calm Calm - N/A   Clear
6:56 PM 73.0 °F 57.9 °F 59% 30.14 in 10.0 mi Calm Calm - N/A   Clear
7:56 PM 66.9 °F 57.0 °F 70% 30.15 in 10.0 mi Calm Calm - N/A   Clear
8:56 PM 66.0 °F 55.9 °F 70% 30.17 in 10.0 mi Calm Calm - N/A   Clear
9:56 PM 64.0 °F 55.0 °F 73% 30.17 in 10.0 mi Calm Calm - N/A   Clear
10:56 PM 60.1 °F 57.0 °F 90% 30.18 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 63.0 °F 54.0 °F 72% 30.18 in 10.0 mi Calm Calm - N/A   Clear