Gaithersburg, MD

8:03 PM EST on November 17, 2019 (GMT -0500)
Montgomery County

Weather History for KGAI - September, 2019

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Thursday, September 12, 2019

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 80 °F -  
Max Temperature 91 °F 82 °F 99 °F (1983)
Min Temperature 68 °F 59 °F 40 °F (1967)
Cooling Degree Days 14    
Growing Degree Days 30 (Base 50)    
Moisture  
Dew Point 70 °F    
Average Humidity 81    
Maximum Humidity 96    
Minimum Humidity 48    
Precipitation  
Precipitation 0.16 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.14 in    
Wind  
Wind Speed 3 mph (WNW)    
Max Wind Speed 12 mph    
Max Gust Speed 17 mph    
Visibility 9 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. 12, 2019 Rise Set
Actual Time 6:47 AM EDT 7:22 PM EDT
Civil Twilight 6:20 AM EDT 7:49 PM EDT
Nautical Twilight 5:48 AM EDT 8:20 PM EDT
Astronomical Twilight 5:15 AM EDT 8:53 PM EDT
Moon 7:04 PM EDT (9/12) 5:05 AM EDT (9/12)
Length of Visible Light 13h 29m
Length of Day
12h 35m
Waxing Gibbous, 98% of the Moon is Illuminated
Sep 12
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 70.0 °F - 68.0 °F 93% 30.12 in 10.0 mi Calm Calm - N/A   Clear
1:56 AM 70.0 °F - 66.9 °F 90% 30.11 in 10.0 mi Calm Calm - N/A   Clear
2:56 AM 70.0 °F - 66.9 °F 90% 30.10 in 10.0 mi Calm Calm - N/A   Clear
3:56 AM 69.1 °F - 66.9 °F 93% 30.10 in 10.0 mi Calm Calm - N/A   Clear
4:56 AM 69.1 °F - 66.9 °F 93% 30.10 in 10.0 mi Calm Calm - N/A   Clear
5:56 AM 69.1 °F - 66.9 °F 93% 30.12 in 10.0 mi Calm Calm - N/A   Clear
6:56 AM 68.0 °F - 66.0 °F 93% 30.14 in 10.0 mi Calm Calm - N/A   Clear
7:56 AM 71.1 °F - 68.0 °F 90% 30.15 in 10.0 mi NW 4.6 mph - N/A   Clear
8:56 AM 78.1 °F - 70.0 °F 76% 30.15 in 10.0 mi WNW 6.9 mph - N/A   Clear
9:56 AM 82.9 °F 87.5 °F 71.1 °F 67% 30.15 in 10.0 mi West 9.2 mph - N/A   Clear
10:56 AM 86.0 °F 92.2 °F 72.0 °F 63% 30.14 in 10.0 mi West 11.5 mph - N/A   Clear
11:56 AM 88.0 °F 92.9 °F 70.0 °F 55% 30.14 in 10.0 mi WNW 11.5 mph 17.3 mph N/A   Clear
12:56 PM 89.1 °F 94.1 °F 70.0 °F 53% 30.13 in 10.0 mi Variable 6.9 mph - N/A   Clear
1:56 PM 90.0 °F 93.6 °F 68.0 °F 48% 30.12 in 10.0 mi NW 9.2 mph - N/A   Clear
2:56 PM 91.0 °F 96.6 °F 70.0 °F 50% 30.11 in 10.0 mi Variable 3.5 mph 17.3 mph N/A   Mostly Cloudy
3:56 PM 90.0 °F 95.4 °F 70.0 °F 52% 30.10 in 6.0 mi Calm Calm - N/A   Haze
4:53 PM 77.0 °F - 71.6 °F 83% 30.11 in 1.8 mi Variable 4.6 mph - N/A Rain Heavy Rain
4:56 PM 75.9 °F - 73.0 °F 91% 30.13 in 1.2 mi NNE 8.1 mph - N/A Rain Heavy Rain
5:04 PM 75.2 °F - 73.4 °F 94% 30.09 in 4.0 mi Variable 4.6 mph - 0.06 in Rain Light Rain
5:56 PM 77.0 °F - 73.9 °F 90% 30.11 in 10.0 mi Calm Calm - 0.16 in   Clear
6:56 PM 77.0 °F - 75.0 °F 94% 30.13 in 10.0 mi Calm Calm - N/A   Clear
7:56 PM 75.0 °F - 73.9 °F 96% 30.14 in 10.0 mi Calm Calm - N/A   Overcast
8:56 PM 75.0 °F - 70.0 °F 84% 30.18 in 10.0 mi Variable 5.8 mph - N/A   Overcast
9:56 PM 73.0 °F - 69.1 °F 87% 30.21 in 10.0 mi Variable 3.5 mph - N/A   Clear
10:56 PM 71.1 °F - 68.0 °F 90% 30.22 in 10.0 mi Calm Calm - N/A   Clear
11:21 PM 71.6 °F - 69.8 °F 94% 30.19 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
11:56 PM 72.0 °F - 69.1 °F 91% 30.23 in 10.0 mi Variable 3.5 mph - N/A   Overcast