Weather History for Chatham, MA

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Monday, December 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 28 °F -  
Max Temperature 35 °F 38 °F 50 °F (1990)
Min Temperature 21 °F 25 °F 12 °F (1998)
Degree Days  
Heating Degree Days 37    
Moisture  
Dew Point 20 °F    
Average Humidity 69    
Maximum Humidity 78    
Minimum Humidity 60    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.96 in    
Wind  
Wind Speed 8 mph (West)    
Max Wind Speed 13 mph    
Max Gust Speed 36 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

Dec. 31, 2012 Rise Set
Actual Time 7:06 AM EST 4:19 PM EST
Civil Twilight 6:35 AM EST 4:51 PM EST
Nautical Twilight 6:00 AM EST 5:26 PM EST
Astronomical Twilight 5:26 AM EST 5:59 PM EST
Moon 7:50 PM EST (12/31) 8:44 AM EST (12/31)
Length of Visible Light 10h 15m
Length of Day
9h 12m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 26.1 °F 15.0 °F 14.0 °F 60% 29.93 in 10.0 mi NNW 12.7 mph 35.7 mph N/A   Clear
1:52 AM 25.0 °F 13.6 °F 14.0 °F 63% 29.96 in 10.0 mi NW 12.7 mph 28.8 mph N/A   Clear
2:52 AM 25.0 °F 14.2 °F 14.0 °F 63% 29.99 in 10.0 mi WNW 11.5 mph 20.7 mph N/A   Clear
3:52 AM 24.1 °F 18.2 °F 12.9 °F 62% 30.02 in 10.0 mi Variable 4.6 mph 18.4 mph N/A   Clear
4:52 AM 21.0 °F 13.4 °F 12.0 °F 68% 30.03 in 10.0 mi West 5.8 mph - N/A   Clear
5:52 AM 21.9 °F 14.5 °F 12.0 °F 66% 30.04 in 10.0 mi Variable 5.8 mph - N/A   Clear
6:52 AM 21.9 °F 14.5 °F 14.0 °F 72% 30.06 in 10.0 mi Variable 5.8 mph - N/A   Clear
7:52 AM 25.0 °F 15.5 °F 16.0 °F 69% 30.05 in 10.0 mi WSW 9.2 mph - N/A   Clear
8:52 AM 27.0 °F 17.3 °F 19.0 °F 72% 30.06 in 10.0 mi West 10.4 mph 17.3 mph N/A   Clear
9:52 AM 30.0 °F 21.7 °F 21.0 °F 69% 30.05 in 10.0 mi WSW 9.2 mph - N/A   Clear
10:52 AM 33.1 °F 26.9 °F 21.9 °F 64% 30.03 in 10.0 mi Variable 6.9 mph 21.9 mph N/A   Clear
11:52 AM 32.0 °F 25.6 °F 21.9 °F 66% 30.00 in 10.0 mi West 6.9 mph 19.6 mph N/A   Overcast
12:52 PM 33.1 °F 24.9 °F 23.0 °F 66% 29.96 in 10.0 mi West 10.4 mph 18.4 mph N/A   Overcast
1:52 PM 32.0 °F 24.2 °F 23.0 °F 69% 29.95 in 10.0 mi West 9.2 mph 20.7 mph N/A   Mostly Cloudy
2:52 PM 32.0 °F 25.6 °F 23.0 °F 69% 29.95 in 10.0 mi Variable 6.9 mph - N/A   Overcast
3:52 PM 32.0 °F 28.7 °F 23.0 °F 69% 29.94 in 10.0 mi Variable 3.5 mph - N/A   Partly Cloudy
4:52 PM 30.0 °F - 21.9 °F 72% 29.94 in 10.0 mi Calm Calm - N/A   Clear
5:52 PM 28.0 °F - 21.9 °F 78% 29.92 in 10.0 mi Calm Calm - N/A   Clear
6:52 PM 30.9 °F 26.2 °F 23.0 °F 72% 29.91 in 10.0 mi West 4.6 mph - N/A   Clear
7:52 PM 32.0 °F 26.4 °F 23.0 °F 69% 29.89 in 10.0 mi West 5.8 mph - N/A   Clear
8:52 PM 32.0 °F - 24.1 °F 73% 29.86 in 10.0 mi Calm Calm - N/A   Clear
9:52 PM 33.1 °F 30.0 °F 26.1 °F 75% 29.84 in 10.0 mi West 3.5 mph - N/A   Partly Cloudy
10:52 PM 35.1 °F 31.0 °F 27.0 °F 72% 29.82 in 10.0 mi West 4.6 mph - N/A   Overcast
11:52 PM 35.1 °F 29.3 °F 25.0 °F 67% 29.80 in 10.0 mi West 6.9 mph - N/A   Overcast