Weather History for Chatham, MA

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Week of September 16, 2012 through September 22, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 73 °F 69 °F 63 °F
Mean Temperature 66 °F 61 °F 56 °F
Min Temperature 61 °F 55 °F 48 °F
Degree Days  
Heating Degree Days (base 65) 9 4 0 26
Cooling Degree Days (base 65) 2 0 0 2
Growing Degree Days (base 50) 16 11 6 80
Dew Point  
Dew Point 68 °F 55 °F 45 °F
Precipitation  
Precipitation 1.14 in 0.17 in 0.00 in 1.20 in
Snowdepth - - - -
Wind  
Wind 16 mph 6 mph 0 mph
Gust Wind 32 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.23 in 30.04 in 29.80 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Sep. 19, 2012 Rise Set
Actual Time 6:24 AM EDT 6:41 PM EDT
Civil Twilight 5:56 AM EDT 7:09 PM EDT
Nautical Twilight 5:24 AM EDT 7:41 PM EDT
Astronomical Twilight 4:50 AM EDT 8:15 PM EDT
Moon 10:35 AM EDT (9/19) 8:43 PM EDT (9/19)
Length of Visible Light 13h 12m
Length of Day
12h 16m
Waxing Crescent, 17% of the Moon is Illuminated
Sep 19
Waxing Crescent
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
16 69 60 51 52 49 45 93 70 49 30.09 30.05 30.01 10 10 10 7 1 - 0.00  
17 73 60 48 55 52 47 97 71 43 30.12 30.09 30.06 10 10 10 9 4 - 0.00  
18 73 66 61 64 60 54 90 78 66 30.10 30.01 29.87 10 10 10 15 7 28 0.00  
19 70 65 60 68 61 48 100 84 51 30.17 29.91 29.80 10 6 1 16 8 32 1.14 Rain
20 64 59 54 53 49 47 86 68 54 30.23 30.19 30.17 10 10 10 13 8 21 0.00  
21 63 56 50 61 55 49 100 87 72 30.16 30.09 30.00 10 9 2 12 5 17 0.03 Rain
22 68 64 60 61 60 59 100 93 78 29.98 29.94 29.90 10 6 1 9 6 - 0.03