Weather History for Chatham, MA

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Monday, September 17, 2012

  Actual Average Record
Temperature  
Mean Temperature 60 °F -  
Max Temperature 73 °F 68 °F 77 °F (2006)
Min Temperature 48 °F 55 °F 45 °F (2013)
Degree Days  
Heating Degree Days 5    
Growing Degree Days 10 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 71    
Maximum Humidity 97    
Minimum Humidity 43    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.09 in    
Wind  
Wind Speed 4 mph (WSW)    
Max Wind Speed 9 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. 17, 2012 Rise Set
Actual Time 6:22 AM EDT 6:45 PM EDT
Civil Twilight 5:54 AM EDT 7:12 PM EDT
Nautical Twilight 5:22 AM EDT 7:45 PM EDT
Astronomical Twilight 4:48 AM EDT 8:19 PM EDT
Moon 8:10 AM EDT (9/17) 7:22 PM EDT (9/17)
Length of Visible Light 13h 18m
Length of Day
12h 22m
Waxing Crescent, 3% of the Moon is Illuminated
Sep 17
Waxing Crescent
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
12:52 AM 54.0 °F 50.0 °F 86% 30.06 in 10.0 mi WNW 3.5 mph - N/A   Clear
1:52 AM 54.0 °F 51.1 °F 90% 30.06 in 10.0 mi NW 3.5 mph - N/A   Clear
2:52 AM 51.1 °F 50.0 °F 96% 30.06 in 10.0 mi NW 3.5 mph - N/A   Clear
3:52 AM 51.1 °F 48.9 °F 92% 30.06 in 10.0 mi Calm Calm - N/A   Clear
4:52 AM 48.9 °F 48.0 °F 97% 30.07 in 10.0 mi Calm Calm - N/A   Clear
5:52 AM 48.0 °F 46.9 °F 96% 30.08 in 10.0 mi Calm Calm - N/A   Clear
6:52 AM 50.0 °F 48.0 °F 93% 30.09 in 10.0 mi Calm Calm - N/A   Clear
8:52 AM 63.0 °F 52.0 °F 67% 30.11 in 10.0 mi NW 3.5 mph - N/A   Clear
9:52 AM 68.0 °F 51.1 °F 55% 30.12 in 10.0 mi WNW 4.6 mph - N/A   Clear
10:52 AM 70.0 °F 52.0 °F 53% 30.12 in 10.0 mi Variable 4.6 mph - N/A   Clear
11:52 AM 72.0 °F 48.0 °F 43% 30.11 in 10.0 mi SW 8.1 mph - N/A   Clear
12:52 PM 72.0 °F 52.0 °F 49% 30.10 in 10.0 mi SSW 9.2 mph - N/A   Clear
1:52 PM 72.0 °F 54.0 °F 53% 30.09 in 10.0 mi SSW 9.2 mph - N/A   Clear
2:52 PM 72.0 °F 53.1 °F 51% 30.09 in 10.0 mi SSW 9.2 mph - N/A   Clear
3:52 PM 70.0 °F 55.0 °F 59% 30.07 in 10.0 mi SSW 6.9 mph - N/A   Clear
4:52 PM 68.0 °F 53.1 °F 59% 30.07 in 10.0 mi Variable 5.8 mph - N/A   Clear
5:52 PM 66.0 °F 53.1 °F 63% 30.07 in 10.0 mi Variable 4.6 mph - N/A   Clear
6:52 PM 64.0 °F 53.1 °F 67% 30.07 in 10.0 mi SW 3.5 mph - N/A   Clear
7:52 PM 61.0 °F 53.1 °F 75% 30.09 in 10.0 mi Calm Calm - N/A   Clear
8:52 PM 62.1 °F 53.1 °F 72% 30.10 in 10.0 mi SW 3.5 mph - N/A   Clear
9:52 PM 64.0 °F 55.0 °F 73% 30.11 in 10.0 mi SW 6.9 mph - N/A   Clear
10:52 PM 64.0 °F 54.0 °F 70% 30.11 in 10.0 mi SSW 6.9 mph - N/A   Clear
11:52 PM 64.0 °F 52.0 °F 65% 30.10 in 10.0 mi SSW 5.8 mph - N/A   Clear