Weather History for Chatham, MA

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Saturday, May 18, 2013

  Actual Average Record
Temperature  
Mean Temperature 55 °F -  
Max Temperature 64 °F 59 °F 83 °F (1977)
Min Temperature 46 °F 45 °F 41 °F (1981)
Degree Days  
Heating Degree Days 10    
Growing Degree Days 5 (Base 50)    
Moisture  
Dew Point 49 °F    
Average Humidity 78    
Maximum Humidity 97    
Minimum Humidity 60    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.30 in    
Wind  
Wind Speed 4 mph (SW)    
Max Wind Speed 12 mph    
Max Gust Speed 20 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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Astronomy

May. 18, 2013 Rise Set
Actual Time 5:17 AM EDT 7:56 PM EDT
Civil Twilight 4:45 AM EDT 8:28 PM EDT
Nautical Twilight 4:05 AM EDT 9:08 PM EDT
Astronomical Twilight 3:19 AM EDT 9:54 PM EDT
Moon 12:50 PM EDT (5/18) 1:14 AM EDT (5/18)
Length of Visible Light 15h 42m
Length of Day
14h 38m
First Quarter, 55% of the Moon is Illuminated
May 18
First Quarter
May 25
Full
May 31
Last Quarter
Jun 8
New
Jun 16
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 46.9 °F 44.1 °F 90% 30.24 in 10.0 mi Calm Calm - N/A   Clear
1:52 AM 48.0 °F 45.0 °F 89% 30.24 in 10.0 mi WSW 3.5 mph - N/A   Clear
2:52 AM 48.9 °F 46.0 °F 90% 30.24 in 10.0 mi West 3.5 mph - N/A   Clear
3:52 AM 46.9 °F 46.0 °F 97% 30.24 in 10.0 mi Calm Calm - N/A   Clear
4:52 AM 46.9 °F 44.1 °F 90% 30.26 in 10.0 mi WNW 3.5 mph - N/A   Clear
5:52 AM 46.9 °F 44.1 °F 90% 30.28 in 10.0 mi West 3.5 mph - N/A   Clear
6:52 AM 54.0 °F 48.0 °F 80% 30.30 in 10.0 mi Calm Calm - N/A   Clear
7:52 AM 59.0 °F 48.0 °F 67% 30.31 in 10.0 mi Variable 3.5 mph - N/A   Clear
8:52 AM 61.0 °F 46.9 °F 60% 30.32 in 10.0 mi SW 8.1 mph - N/A   Clear
9:52 AM 61.0 °F 48.9 °F 64% 30.33 in 10.0 mi SSW 6.9 mph - N/A   Clear
10:52 AM 63.0 °F 50.0 °F 63% 30.33 in 10.0 mi SW 8.1 mph 17.3 mph N/A   Clear
11:52 AM 64.0 °F 52.0 °F 65% 30.32 in 10.0 mi SSW 8.1 mph - N/A   Partly Cloudy
12:52 PM 62.1 °F 52.0 °F 70% 30.32 in 10.0 mi SSW 10.4 mph - N/A   Scattered Clouds
1:52 PM 64.0 °F 53.1 °F 67% 30.31 in 10.0 mi SW 9.2 mph - N/A   Clear
2:52 PM 63.0 °F 52.0 °F 67% 30.31 in 10.0 mi SW 9.2 mph 17.3 mph N/A   Clear
3:52 PM 61.0 °F 51.1 °F 70% 30.30 in 10.0 mi SW 11.5 mph 19.6 mph N/A   Clear
4:52 PM 61.0 °F 51.1 °F 70% 30.31 in 10.0 mi SSW 8.1 mph - N/A   Clear
5:52 PM 60.1 °F 50.0 °F 69% 30.31 in 10.0 mi SW 9.2 mph 17.3 mph N/A   Clear
6:52 PM 57.9 °F 50.0 °F 75% 30.32 in 10.0 mi SW 5.8 mph - N/A   Clear
7:52 PM 55.9 °F 51.1 °F 84% 30.32 in 10.0 mi WSW 6.9 mph - N/A   Clear
8:52 PM 55.9 °F 52.0 °F 87% 30.33 in 10.0 mi SW 8.1 mph - N/A   Clear
9:52 PM 55.9 °F 53.1 °F 90% 30.33 in 10.0 mi SW 5.8 mph - N/A   Clear
10:52 PM 55.9 °F 53.1 °F 90% 30.32 in 10.0 mi SW 6.9 mph - N/A   Clear
11:52 PM 55.9 °F 53.1 °F 90% 30.33 in 10.0 mi WSW 5.8 mph - N/A   Clear