Weather History for Charleston, SC

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Monday, August 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 81 °F 81 °F  
Max Temperature 88 °F 89 °F 97 °F (1954)
Min Temperature 74 °F 72 °F 63 °F (1943)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 June heating degree days 0 1  
Since 1 July heating degree days 0 0  
Cooling Degree Days 16 16  
Month to date cooling degree days 335 329  
Year to date cooling degree days 1826 1641  
Since 1 June cooling degree days 1261 1279  
Growing Degree Days 30 (Base 50)    
Moisture  
Dew Point 72 °F    
Average Humidity 75    
Maximum Humidity 94    
Minimum Humidity 55    
Precipitation  
Precipitation 0.01 in 0.24 in 3.91 in (1940)
Month to date precipitation 3.83 4.40  
Year to date precipitation 31.20 32.89  
Sea Level Pressure  
Sea Level Pressure 29.91 in    
Wind  
Wind Speed 7 mph (WSW)    
Max Wind Speed 15 mph    
Max Gust Speed 18 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 20, 2012 Rise Set
Actual Time 6:47 AM EDT 7:59 PM EDT
Civil Twilight 6:21 AM EDT 8:24 PM EDT
Nautical Twilight 5:50 AM EDT 8:55 PM EDT
Astronomical Twilight 5:18 AM EDT 9:27 PM EDT
Moon 9:52 AM EDT (8/20) 9:38 PM EDT (8/20)
Length of Visible Light 14h 03m
Length of Day
13h 12m
Waxing Crescent, 11% of the Moon is Illuminated
Aug 20
Waxing Crescent
Aug 24
First Quarter
Aug 31
Full
Sep 8
Last Quarter
Sep 15
New

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 75.9 °F - 73.9 °F 94% 29.87 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:56 AM 75.0 °F - 73.9 °F 96% 29.88 in 10.0 mi Calm Calm - N/A   Clear
2:56 AM 75.9 °F - 73.9 °F 94% 29.86 in 10.0 mi SW 5.8 mph - N/A   Partly Cloudy
3:56 AM 75.9 °F - 73.9 °F 94% 29.86 in 10.0 mi WSW 8.1 mph - N/A   Scattered Clouds
4:56 AM 75.0 °F - 73.0 °F 94% 29.88 in 10.0 mi WSW 4.6 mph - N/A   Mostly Cloudy
5:56 AM 73.9 °F - 72.0 °F 93% 29.89 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
6:56 AM 73.9 °F - 71.1 °F 91% 29.91 in 10.0 mi WSW 9.2 mph - N/A   Mostly Cloudy
7:56 AM 75.0 °F - 72.0 °F 90% 29.93 in 10.0 mi WSW 8.1 mph - N/A   Mostly Cloudy
8:56 AM 75.0 °F - 72.0 °F 90% 29.94 in 10.0 mi West 6.9 mph - 0.00 in Rain Light Rain
9:56 AM 77.0 °F - 72.0 °F 84% 29.94 in 10.0 mi West 8.1 mph - 0.00 in   Mostly Cloudy
10:56 AM 79.0 °F - 71.1 °F 77% 29.93 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
11:56 AM 82.0 °F 86.3 °F 71.1 °F 69% 29.92 in 10.0 mi West 10.4 mph - N/A   Mostly Cloudy
12:56 PM 84.0 °F 88.4 °F 70.0 °F 63% 29.90 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
1:56 PM 84.9 °F 89.4 °F 70.0 °F 61% 29.90 in 10.0 mi Variable 5.8 mph - N/A   Mostly Cloudy
2:56 PM 87.1 °F 91.3 °F 69.1 °F 55% 29.88 in 10.0 mi West 10.4 mph - N/A   Mostly Cloudy
3:56 PM 80.1 °F 83.8 °F 72.0 °F 76% 29.89 in 10.0 mi West 4.6 mph - 0.01 in   Mostly Cloudy
4:56 PM 82.0 °F 86.3 °F 71.1 °F 69% 29.90 in 10.0 mi WSW 8.1 mph - 0.00 in   Mostly Cloudy
5:56 PM 81.0 °F 84.9 °F 71.1 °F 72% 29.91 in 10.0 mi SW 9.2 mph - N/A   Mostly Cloudy
6:56 PM 80.1 °F 83.8 °F 72.0 °F 76% 29.91 in 10.0 mi SSW 5.8 mph - 0.00 in   Mostly Cloudy
7:56 PM 78.1 °F - 73.0 °F 84% 29.92 in 10.0 mi South 10.4 mph - N/A   Mostly Cloudy
8:56 PM 75.9 °F - 72.0 °F 87% 29.93 in 10.0 mi SSW 4.6 mph - N/A   Overcast
9:56 PM 75.9 °F - 72.0 °F 87% 29.94 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
10:56 PM 75.9 °F - 72.0 °F 87% 29.97 in 10.0 mi SSW 4.6 mph - N/A   Overcast
11:56 PM 75.0 °F - 72.0 °F 90% 29.98 in 10.0 mi SSW 3.5 mph - N/A   Mostly Cloudy