Weather History for Chatham, MA

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Sunday, July 21, 2013

  Actual Average Record
Temperature  
Mean Temperature 72 °F -  
Max Temperature 78 °F 74 °F 84 °F (1998)
Min Temperature 66 °F 61 °F 50 °F (2000)
Cooling Degree Days 6    
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 66 °F    
Average Humidity 81    
Maximum Humidity 90    
Minimum Humidity 69    
Precipitation  
Precipitation 0.02 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.94 in    
Wind  
Wind Speed 3 mph (East)    
Max Wind Speed 9 mph    
Max Gust Speed -    
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

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Date:

Astronomy

Jul. 21, 2013 Rise Set
Actual Time 5:23 AM EDT 8:08 PM EDT
Civil Twilight 4:51 AM EDT 8:40 PM EDT
Nautical Twilight 4:10 AM EDT 9:21 PM EDT
Astronomical Twilight 3:23 AM EDT 10:07 PM EDT
Moon 7:02 PM EDT (7/21) 4:06 AM EDT (7/21)
Length of Visible Light 15h 49m
Length of Day
14h 44m
Waxing Gibbous, 98% of the Moon is Illuminated
Jul 21
Waxing Gibbous
Jul 22
Full
Jul 29
Last Quarter
Aug 6
New
Aug 14
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 73.9 °F 69.1 °F 85% 29.81 in 9.0 mi Calm Calm - N/A   Clear
1:52 AM 75.9 °F 72.0 °F 87% 29.83 in 6.0 mi Variable 3.5 mph - N/A   Clear
2:52 AM 75.9 °F 69.1 °F 79% 29.84 in 10.0 mi WNW 4.6 mph - N/A   Clear
3:52 AM 75.9 °F 64.9 °F 69% 29.84 in 10.0 mi Variable 4.6 mph - N/A   Clear
4:52 AM 75.0 °F 66.0 °F 73% 29.87 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:52 AM 73.9 °F 66.9 °F 79% 29.89 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
6:52 AM 73.0 °F 69.1 °F 87% 29.91 in 10.0 mi Calm Calm - 0.01 in Rain Light Rain
7:52 AM 73.0 °F 68.0 °F 84% 29.92 in 10.0 mi Calm Calm - 0.01 in   Overcast
8:52 AM 73.9 °F 68.0 °F 82% 29.94 in 10.0 mi ENE 4.6 mph - 0.00 in   Overcast
9:52 AM 73.0 °F 66.9 °F 81% 29.95 in 10.0 mi ENE 9.2 mph - N/A   Overcast
10:52 AM 72.0 °F 63.0 °F 73% 29.96 in 10.0 mi ENE 6.9 mph - 0.00 in   Overcast
11:52 AM 73.9 °F 64.0 °F 71% 29.97 in 10.0 mi East 6.9 mph - N/A   Mostly Cloudy
12:52 PM 75.0 °F 66.0 °F 73% 29.97 in 10.0 mi ENE 5.8 mph - 0.00 in   Partly Cloudy
1:52 PM 75.0 °F 66.0 °F 73% 29.97 in 10.0 mi ESE 5.8 mph - N/A   Overcast
2:52 PM 75.9 °F 66.0 °F 71% 29.97 in 10.0 mi Variable 4.6 mph - N/A   Mostly Cloudy
3:52 PM 77.0 °F 66.0 °F 69% 29.98 in 10.0 mi East 5.8 mph - N/A   Clear
4:52 PM 75.0 °F 66.0 °F 73% 29.97 in 10.0 mi East 4.6 mph - N/A   Clear
5:52 PM 73.0 °F 66.9 °F 81% 29.97 in 10.0 mi ESE 5.8 mph - N/A   Mostly Cloudy
6:18 PM 73.4 °F 66.2 °F 78% 29.96 in 10.0 mi Variable 4.6 mph - N/A   Partly Cloudy
6:52 PM 72.0 °F 66.9 °F 84% 29.96 in 9.0 mi Variable 4.6 mph - N/A   Mostly Cloudy
7:52 PM 69.1 °F 66.0 °F 90% 29.98 in 7.0 mi Variable 3.5 mph - N/A   Overcast
8:04 PM 69.8 °F 66.2 °F 88% 29.98 in 6.0 mi SE 3.5 mph - N/A   Mostly Cloudy
8:20 PM 68.0 °F 64.4 °F 88% 29.98 in 8.0 mi Calm Calm - N/A   Scattered Clouds
8:52 PM 66.9 °F 64.0 °F 90% 30.00 in 7.0 mi Calm Calm - N/A   Partly Cloudy
9:52 PM 66.0 °F 63.0 °F 90% 30.02 in 9.0 mi SE 3.5 mph - N/A   Clear
10:52 PM 66.0 °F 63.0 °F 90% 30.01 in 10.0 mi SE 4.6 mph - N/A   Clear
11:52 PM 66.0 °F 63.0 °F 90% 30.01 in 8.0 mi Calm Calm - N/A   Clear