Weather History for Chatham, MA

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Tuesday, August 21, 2012

  Actual Average Record
Temperature  
Mean Temperature 72 °F -  
Max Temperature 82 °F 74 °F 84 °F (1976)
Min Temperature 63 °F 61 °F 54 °F (1977)
Cooling Degree Days 8    
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 64 °F    
Average Humidity 77    
Maximum Humidity 93    
Minimum Humidity 56    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.00 in    
Wind  
Wind Speed 3 mph (SW)    
Max Wind Speed 10 mph    
Max Gust Speed 18 mph    
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

Aug. 21, 2012 Rise Set
Actual Time 5:55 AM EDT 7:30 PM EDT
Civil Twilight 5:25 AM EDT 7:59 PM EDT
Nautical Twilight 4:50 AM EDT 8:34 PM EDT
Astronomical Twilight 4:12 AM EDT 9:12 PM EDT
Moon 10:26 AM EDT 9:22 PM EDT
Length of Visible Light 14h 33m
Length of Day
13h 35m
Waxing Crescent, 19% of the Moon is Illuminated
Aug 21
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
12:52 AM 63.0 °F - 61.0 °F 93% 29.93 in 10.0 mi Calm Calm - N/A   Clear
1:52 AM 64.0 °F - 61.0 °F 90% 29.92 in 10.0 mi Calm Calm - N/A   Clear
2:52 AM 64.9 °F - 62.1 °F 90% 29.93 in 10.0 mi Calm Calm - N/A   Clear
3:52 AM 64.0 °F - 62.1 °F 93% 29.94 in 10.0 mi Calm Calm - N/A   Clear
4:52 AM 64.0 °F - 61.0 °F 90% 29.94 in 10.0 mi Calm Calm - N/A   Clear
5:52 AM 64.9 °F - 61.0 °F 87% 29.95 in 10.0 mi Calm Calm - N/A   Clear
6:52 AM 64.9 °F - 62.1 °F 90% 29.97 in 10.0 mi Variable 3.5 mph - N/A   Partly Cloudy
7:52 AM 70.0 °F - 64.0 °F 81% 29.98 in 10.0 mi Variable 3.5 mph - N/A   Clear
8:52 AM 73.0 °F - 64.9 °F 76% 29.99 in 10.0 mi WSW 4.6 mph - N/A   Scattered Clouds
9:52 AM 75.0 °F - 64.9 °F 71% 29.99 in 10.0 mi SW 6.9 mph - N/A   Overcast
10:52 AM 77.0 °F - 66.0 °F 69% 30.00 in 10.0 mi SSW 6.9 mph - N/A   Partly Cloudy
11:52 AM 78.1 °F - 64.9 °F 64% 30.00 in 10.0 mi SW 10.4 mph - N/A   Scattered Clouds
12:52 PM 82.0 °F 84.1 °F 66.0 °F 58% 30.00 in 10.0 mi Variable 6.9 mph - N/A   Scattered Clouds
1:52 PM 80.1 °F 81.7 °F 64.0 °F 58% 30.01 in 10.0 mi SW 9.2 mph 16.1 mph N/A   Clear
2:52 PM 81.0 °F 82.5 °F 64.0 °F 56% 30.01 in 10.0 mi Variable 6.9 mph 18.4 mph N/A   Unknown
3:52 PM 79.0 °F - 66.0 °F 64% 30.01 in 10.0 mi SW 5.8 mph - N/A   Clear
4:52 PM 77.0 °F - 66.9 °F 71% 30.02 in 10.0 mi SW 9.2 mph 18.4 mph N/A   Clear
5:52 PM 75.0 °F - 66.0 °F 73% 30.03 in 10.0 mi SW 6.9 mph - N/A   Clear
6:52 PM 73.0 °F - 66.0 °F 79% 30.04 in 10.0 mi SW 5.8 mph - N/A   Clear
7:52 PM 73.0 °F - 66.0 °F 79% 30.05 in 10.0 mi Variable 4.6 mph - N/A   Clear
8:52 PM 71.1 °F - 64.0 °F 78% 30.07 in 10.0 mi Calm Calm - N/A   Clear
9:52 PM 71.1 °F - 63.0 °F 75% 30.08 in 10.0 mi Calm Calm - N/A   Clear
10:52 PM 70.0 °F - 63.0 °F 78% 30.09 in 10.0 mi Calm Calm - N/A   Clear
11:52 PM 69.1 °F - 63.0 °F 81% 30.09 in 10.0 mi WSW 3.5 mph - N/A   Clear