Weather History for Gaithersburg, MD

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Sunday, September 16, 2012

  Actual Average (KCGS) Record (KCGS)
Temperature  
Mean Temperature 60 °F -  
Max Temperature 71 °F 80 °F 96 °F (1970)
Min Temperature 50 °F 58 °F 44 °F (1985)
Degree Days  
Heating Degree Days 4    
Growing Degree Days 10 (Base 50)    
Moisture  
Dew Point 50 °F    
Average Humidity 72    
Maximum Humidity 94    
Minimum Humidity 43    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.16 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

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Date:

Astronomy

Sep. 16, 2012 Rise Set
Actual Time 6:51 AM EDT 7:14 PM EDT
Civil Twilight 6:24 AM EDT 7:41 PM EDT
Nautical Twilight 5:52 AM EDT 8:12 PM EDT
Astronomical Twilight 5:20 AM EDT 8:44 PM EDT
Moon 7:27 AM EDT (9/16) 7:19 PM EDT (9/16)
Length of Visible Light 13h 16m
Length of Day
12h 23m
New Moon, 0% of the Moon is Illuminated
Sep 16
New Moon
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 51.8 °F 50.0 °F 94% 30.18 in 10.0 mi Calm Calm - N/A   Clear
12:35 AM 51.8 °F 48.2 °F 88% 30.19 in 10.0 mi Calm Calm - N/A   Clear
12:55 AM 51.8 °F 48.2 °F 88% 30.19 in 10.0 mi Calm Calm - N/A   Clear
1:15 AM 53.6 °F 48.2 °F 82% 30.19 in 10.0 mi Calm Calm - N/A   Clear
1:35 AM 53.6 °F 48.2 °F 82% 30.19 in 10.0 mi Calm Calm - N/A   Clear
1:55 AM 51.8 °F 50.0 °F 94% 30.19 in 10.0 mi Calm Calm - N/A   Clear
2:15 AM 51.8 °F 48.2 °F 88% 30.18 in 10.0 mi Calm Calm - N/A   Clear
2:35 AM 51.8 °F 48.2 °F 88% 30.17 in 10.0 mi Calm Calm - N/A   Clear
2:55 AM 53.6 °F 50.0 °F 88% 30.17 in 10.0 mi Calm Calm - N/A   Clear
3:15 AM 53.6 °F 48.2 °F 82% 30.17 in 10.0 mi Calm Calm - N/A   Clear
3:35 AM 51.8 °F 48.2 °F 88% 30.17 in 10.0 mi Calm Calm - N/A   Clear
3:55 AM 51.8 °F 48.2 °F 88% 30.17 in 10.0 mi Calm Calm - N/A   Clear
4:15 AM 51.8 °F 48.2 °F 88% 30.17 in 10.0 mi Calm Calm - N/A   Clear
4:35 AM 51.8 °F 48.2 °F 88% 30.17 in 10.0 mi Calm Calm - N/A   Clear
4:55 AM 51.8 °F 50.0 °F 94% 30.17 in 10.0 mi Calm Calm - N/A   Clear
5:15 AM 51.8 °F 48.2 °F 88% 30.17 in 8.0 mi Calm Calm - N/A   Clear
5:35 AM 51.8 °F 48.2 °F 88% 30.17 in 7.0 mi Calm Calm - N/A   Clear
5:55 AM 50.0 °F 48.2 °F 94% 30.17 in 8.0 mi Calm Calm - N/A   Clear
6:15 AM 50.0 °F 48.2 °F 94% 30.18 in 9.0 mi Calm Calm - N/A   Clear
6:35 AM 51.8 °F 48.2 °F 88% 30.18 in 7.0 mi Calm Calm - N/A   Clear
6:55 AM 51.8 °F 48.2 °F 88% 30.19 in 5.0 mi Calm Calm - N/A   Clear
7:15 AM 51.8 °F 50.0 °F 94% 30.20 in 7.0 mi Calm Calm - N/A   Clear
7:35 AM 51.8 °F 50.0 °F 94% 30.20 in 7.0 mi Calm Calm - N/A   Clear
8:15 AM 53.6 °F 51.8 °F 94% 30.20 in 10.0 mi Calm Calm - N/A   Clear
8:35 AM 55.4 °F 51.8 °F 88% 30.20 in 10.0 mi Calm Calm - N/A   Clear
8:55 AM 59.0 °F 53.6 °F 82% 30.20 in 9.0 mi Calm Calm - N/A   Clear
9:15 AM 60.8 °F 53.6 °F 77% 30.20 in 9.0 mi NW 3.5 mph - N/A   Clear
9:35 AM 64.4 °F 53.6 °F 68% 30.20 in 10.0 mi Calm Calm - N/A   Clear
9:55 AM 66.2 °F 53.6 °F 64% 30.21 in 10.0 mi NNW 3.5 mph - N/A   Clear
10:15 AM 66.2 °F 53.6 °F 64% 30.21 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:35 AM 68.0 °F 50.0 °F 52% 30.21 in 10.0 mi NNE 4.6 mph - N/A   Partly Cloudy
10:55 AM 69.8 °F 48.2 °F 46% 30.20 in 10.0 mi NNW 6.9 mph - N/A   Clear
11:15 AM 69.8 °F 48.2 °F 46% 30.20 in 10.0 mi NNE 3.5 mph - N/A   Clear
11:35 AM 69.8 °F 48.2 °F 46% 30.19 in 10.0 mi NNW 3.5 mph - N/A   Clear
11:55 AM 69.8 °F 50.0 °F 49% 30.19 in 10.0 mi NNE 3.5 mph - N/A   Clear
12:15 PM 69.8 °F 50.0 °F 49% 30.19 in 10.0 mi NW 6.9 mph - N/A   Clear
12:35 PM 69.8 °F 48.2 °F 46% 30.18 in 10.0 mi Calm Calm - N/A   Clear
12:55 PM 71.6 °F 48.2 °F 43% 30.18 in 10.0 mi WNW 5.8 mph - N/A   Clear
1:15 PM 71.6 °F 48.2 °F 43% 30.17 in 10.0 mi Calm Calm - N/A   Clear
1:35 PM 69.8 °F 48.2 °F 46% 30.17 in 10.0 mi West 3.5 mph - N/A   Clear
1:55 PM 69.8 °F 50.0 °F 49% 30.16 in 10.0 mi NW 5.8 mph - N/A   Clear
2:15 PM 69.8 °F 50.0 °F 49% 30.15 in 10.0 mi NW 3.5 mph - N/A   Clear
2:35 PM 69.8 °F 48.2 °F 46% 30.15 in 10.0 mi NW 6.9 mph - N/A   Clear
2:55 PM 69.8 °F 50.0 °F 49% 30.14 in 10.0 mi WNW 5.8 mph - N/A   Clear
3:15 PM 69.8 °F 50.0 °F 49% 30.14 in 10.0 mi NNW 8.1 mph - N/A   Clear
3:35 PM 69.8 °F 48.2 °F 46% 30.13 in 10.0 mi NW 6.9 mph - N/A   Clear
3:55 PM 71.6 °F 50.0 °F 46% 30.13 in 10.0 mi NW 4.6 mph - N/A   Clear
4:15 PM 71.6 °F 48.2 °F 43% 30.13 in 10.0 mi WNW 5.8 mph - N/A   Clear
4:35 PM 71.6 °F 48.2 °F 43% 30.12 in 10.0 mi NW 6.9 mph - N/A   Clear
4:55 PM 69.8 °F 51.8 °F 53% 30.12 in 10.0 mi NW 6.9 mph - N/A   Clear
5:15 PM 71.6 °F 51.8 °F 50% 30.12 in 10.0 mi NW 5.8 mph - N/A   Clear
5:35 PM 71.6 °F 51.8 °F 50% 30.11 in 10.0 mi NW 5.8 mph - N/A   Clear
5:55 PM 69.8 °F 51.8 °F 53% 30.11 in 10.0 mi NNW 5.8 mph - N/A   Clear
6:15 PM 69.8 °F 51.8 °F 53% 30.11 in 10.0 mi North 3.5 mph - N/A   Clear
6:35 PM 68.0 °F 51.8 °F 56% 30.12 in 10.0 mi NNW 3.5 mph - N/A   Clear
6:55 PM 68.0 °F 53.6 °F 60% 30.12 in 10.0 mi Calm Calm - N/A   Clear
7:15 PM 64.4 °F 53.6 °F 68% 30.12 in 10.0 mi Calm Calm - N/A   Clear
7:35 PM 62.6 °F 51.8 °F 68% 30.12 in 10.0 mi Calm Calm - N/A   Clear
7:55 PM 60.8 °F 51.8 °F 72% 30.13 in 10.0 mi Calm Calm - N/A   Clear
8:15 PM 59.0 °F 51.8 °F 77% 30.13 in 10.0 mi Calm Calm - N/A   Clear
8:35 PM 57.2 °F 51.8 °F 82% 30.13 in 10.0 mi Calm Calm - N/A   Clear
8:55 PM 57.2 °F 51.8 °F 82% 30.14 in 10.0 mi Calm Calm - N/A   Clear
9:15 PM 57.2 °F 51.8 °F 82% 30.14 in 10.0 mi Calm Calm - N/A   Clear
9:35 PM 55.4 °F 51.8 °F 88% 30.14 in 10.0 mi Calm Calm - N/A   Clear
9:55 PM 55.4 °F 51.8 °F 88% 30.14 in 10.0 mi Calm Calm - N/A   Clear
10:15 PM 55.4 °F 51.8 °F 88% 30.14 in 10.0 mi Calm Calm - N/A   Clear
10:35 PM 53.6 °F 51.8 °F 94% 30.14 in 10.0 mi Calm Calm - N/A   Clear
10:55 PM 53.6 °F 51.8 °F 94% 30.15 in 10.0 mi Calm Calm - N/A   Clear
11:15 PM 53.6 °F 51.8 °F 94% 30.14 in 10.0 mi Calm Calm - N/A   Clear
11:35 PM 53.6 °F 51.8 °F 94% 30.15 in 10.0 mi Calm Calm - N/A   Clear
11:55 PM 53.6 °F 51.8 °F 94% 30.14 in 10.0 mi Calm Calm - N/A   Clear