Weather History for Chatham, MA

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Month of August, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 84 °F 80 °F 72 °F
Mean Temperature 78 °F 72 °F 64 °F
Min Temperature 73 °F 66 °F 57 °F
Degree Days  
Heating Degree Days (base 65) 1 0 0 1
Cooling Degree Days (base 65) 14 8 0 236
Growing Degree Days (base 50) 28 22 14 690
Dew Point  
Dew Point 76 °F 66 °F 47 °F
Precipitation  
Precipitation 0.64 in 0.06 in 0.00 in 1.73 in
Snowdepth - - - -
Wind  
Wind 15 mph 5 mph 0 mph
Gust Wind 26 mph 19 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.35 in 30.00 in 29.73 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Aug. 09, 2012 Rise Set
Actual Time 5:42 AM EDT 7:47 PM EDT
Civil Twilight 5:12 AM EDT 8:17 PM EDT
Nautical Twilight 4:34 AM EDT 8:54 PM EDT
Astronomical Twilight 3:54 AM EDT 9:35 PM EDT
Moon 11:29 PM EDT (8/9) 1:28 PM EDT (8/9)
Length of Visible Light 15h 05m
Length of Day
14h 04m
Waning Gibbous, 51% of the Moon is Illuminated
Aug 9
Waning Gibbous
Aug 9
Last Quarter
Aug 17
New
Aug 24
First Quarter
Aug 31
Full

Weather History Calendar

Precipitation Actual month total 1.73 Average Month Total: 3.58
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
79 | 66 0.00
Average:
74 | 62 0.08
Fog
Actual:
82 | 64 0.00
Average:
74 | 62 0.09
Fog
Actual:
82 | 73 0.00
Average:
74 | 62 0.09
Fog
Actual:
84 | 73 0.00
Average:
75 | 62 0.09
Fog
Actual:
84 | 72 0.00
Average:
75 | 62 0.10
Rain
Actual:
84 | 66 0.16
Average:
75 | 62 0.10
Scattered Clouds
Actual:
77 | 66 0.00
Average:
75 | 62 0.10
Scattered Clouds
Actual:
82 | 68 0.00
Average:
75 | 62 0.11
Fog
Actual:
82 | 64 0.00
Average:
75 | 62 0.11
Rain
Actual:
77 | 64 0.64
Average:
75 | 62 0.11
Rain
Actual:
80 | 73 0.13
Average:
75 | 62 0.11
Rain
Actual:
80 | 69 0.43
Average:
75 | 62 0.12
Scattered Clouds
Actual:
82 | 72 0.00
Average:
75 | 62 0.12
Clear
Actual:
84 | 68 0.00
Average:
75 | 62 0.12
Thunderstorm
Actual:
78 | 66 0.16
Average:
75 | 61 0.12
Thunderstorm
Actual:
81 | 68 0.10
Average:
74 | 61 0.12
Clear
Actual:
84 | 66 0.00
Average:
74 | 61 0.12
Thunderstorm
Actual:
75 | 66 0.02
Average:
74 | 61 0.12
Scattered Clouds
Actual:
75 | 63 0.00
Average:
74 | 61 0.12
Scattered Clouds
Actual:
75 | 62 0.00
Average:
74 | 61 0.12
Scattered Clouds
Actual:
82 | 63 0.00
Average:
74 | 61 0.12
Scattered Clouds
Actual:
80 | 64 0.00
Average:
74 | 61 0.12
Clear
Actual:
80 | 62 0.00
Average:
73 | 60 0.13
Clear
Actual:
81 | 64 0.00
Average:
73 | 60 0.13
Scattered Clouds
Actual:
77 | 66 0.01
Average:
73 | 60 0.13
Scattered Clouds
Actual:
75 | 62 0.00
Average:
73 | 60 0.13
Scattered Clouds
Actual:
77 | 59 0.01
Average:
73 | 60 0.13
Thunderstorm
Actual:
79 | 70 0.07
Average:
72 | 59 0.13
Scattered Clouds
Actual:
72 | 57 0.00
Average:
72 | 59 0.13
Clear
Actual:
80 | 57 0.00
Average:
72 | 59 0.13
Scattered Clouds
Actual:
82 | 68 0.00
Average:
72 | 59 0.13
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Aug high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 79 72 66 70 67 64 100 87 69 29.96 29.90 29.76 10 9 1 10 6 23 0.00  
2 82 72 64 72 70 65 100 91 74 29.94 29.88 29.85 10 6 0 13 2 18 0.00 Fog
3 82 78 73 75 73 71 100 89 74 30.12 30.03 29.94 10 7 0 13 8 23 0.00 Fog
4 84 78 73 75 74 72 100 90 74 30.26 30.22 30.13 10 6 0 10 7 17 0.00 Fog
5 84 78 72 76 74 72 100 91 76 30.26 30.15 30.01 10 6 0 15 8 26 0.00 Fog
6 84 75 66 74 71 58 100 86 55 29.99 29.97 29.91 10 8 2 13 7 23 0.16 Rain
7 77 70 66 64 61 58 90 72 55 30.03 30.01 29.97 10 10 10 8 4 - 0.00  
8 82 74 68 70 68 63 96 83 62 30.03 30.01 29.99 10 10 10 8 5 - 0.00  
9 82 72 64 71 67 64 100 87 65 30.00 29.97 29.94 10 8 0 9 2 16 0.00 Fog
10 77 70 64 72 67 64 100 91 74 29.99 29.94 29.87 10 6 0 14 5 26 0.64 Fog , Rain
11 80 76 73 75 73 72 100 93 81 29.99 29.92 29.86 10 6 2 10 8 20 0.13 Rain
12 80 74 69 73 72 68 100 94 79 29.99 29.96 29.92 10 7 1 14 8 26 0.43 Rain
13 82 77 72 73 69 64 97 79 54 29.97 29.94 29.92 10 10 5 12 6 17 0.00  
14 84 75 68 70 67 63 87 74 60 29.97 29.95 29.93 10 10 10 10 4 - 0.00  
15 78 72 66 72 69 65 100 92 74 29.96 29.91 29.87 10 6 0 12 2 - 0.16 Fog , Rain , Thunderstorm
16 81 74 68 70 67 61 100 86 52 29.88 29.84 29.81 10 8 2 9 3 - 0.10 Rain , Thunderstorm
17 84 74 66 72 66 61 90 74 54 29.87 29.85 29.83 10 10 8 10 5 21 0.00  
18 75 70 66 72 66 60 94 84 73 29.90 29.86 29.83 10 8 2 8 5 18 0.02 Rain , Thunderstorm
19 75 68 63 64 62 60 93 79 68 29.95 29.93 29.88 10 10 10 12 3 17 0.00  
20 75 68 62 66 62 58 93 82 68 29.94 29.92 29.89 10 10 10 7 2 - 0.00  
21 82 72 63 67 64 61 93 77 56 30.09 30.00 29.92 10 10 10 10 3 18 0.00  
22 80 72 64 68 64 59 93 76 57 30.16 30.13 30.08 10 10 10 7 1 - 0.00  
23 80 70 62 67 64 60 93 76 60 30.17 30.15 30.12 10 10 10 10 3 17 0.00  
24 81 72 64 68 66 62 93 78 56 30.23 30.17 30.12 10 10 7 9 4 - 0.00  
25 77 70 66 68 63 56 93 77 50 30.34 30.31 30.24 10 10 8 12 4 - 0.01  
26 75 68 62 63 61 58 100 82 57 30.35 30.31 30.26 10 9 1 9 3 - 0.00  
27 77 68 59 70 64 57 93 83 64 30.26 30.13 29.99 10 10 10 10 4 20 0.01  
28 79 74 70 73 70 64 97 89 68 29.98 29.83 29.73 10 9 2 12 7 21 0.07 Rain , Thunderstorm
29 72 64 57 62 53 47 80 64 45 29.99 29.94 29.85 10 10 10 9 4 - 0.00  
30 80 68 57 60 55 50 90 63 37 30.06 30.02 29.99 10 10 10 12 5 24 0.00  
31 82 75 68 71 65 57 91 72 52 30.00 29.93 29.85 10 9 6 14 8 26 0.00