Weather History for Chatham, MA

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Month of August, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 87 °F 79 °F 71 °F
Mean Temperature 78 °F 72 °F 67 °F
Min Temperature 73 °F 66 °F 60 °F
Degree Days  
Heating Degree Days (base 65) 0 0 0 0
Cooling Degree Days (base 65) 13 7 2 213
Growing Degree Days (base 50) 28 22 17 665
Dew Point  
Dew Point 73 °F 65 °F 46 °F
Precipitation  
Precipitation 1.60 in 0.11 in 0.00 in 3.39 in
Snowdepth - - - -
Wind  
Wind 28 mph 6 mph 0 mph
Gust Wind 55 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.21 in 29.89 in 29.27 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Aug. 06, 2011 Rise Set
Actual Time 5:38 AM EDT 7:52 PM EDT
Civil Twilight 5:08 AM EDT 8:22 PM EDT
Nautical Twilight 4:30 AM EDT 9:00 PM EDT
Astronomical Twilight 3:48 AM EDT 9:42 PM EDT
Moon 1:53 PM EDT (8/6) 11:38 PM EDT (8/6)
Length of Visible Light 15h 14m
Length of Day
14h 13m
First Quarter, 52% of the Moon is Illuminated
Aug 6
First Quarter
Aug 13
Full
Aug 21
Last Quarter
Aug 28
New
Sep 4
First Quarter

Weather History Calendar

Precipitation Actual month total 3.39 Average Month Total: 3.58
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
84 | 72 0.00
Average:
74 | 62 0.08
Thunderstorm
Actual:
87 | 66 0.57
Average:
74 | 62 0.09
Partly Cloudy
Actual:
75 | 63 0.01
Average:
74 | 62 0.09
Partly Cloudy
Actual:
75 | 64 0.00
Average:
75 | 62 0.09
Partly Cloudy
Actual:
75 | 64 0.00
Average:
75 | 62 0.10
Rain
Actual:
79 | 66 0.00
Average:
75 | 62 0.10
Rain
Actual:
73 | 66 0.86
Average:
75 | 62 0.10
Fog
Actual:
80 | 69 0.00
Average:
75 | 62 0.11
Rain
Actual:
77 | 66 0.05
Average:
75 | 62 0.11
Rain
Actual:
81 | 64 0.00
Average:
75 | 62 0.11
Clear
Actual:
82 | 63 0.00
Average:
75 | 62 0.11
Clear
Actual:
79 | 61 0.00
Average:
75 | 62 0.12
Clear
Actual:
84 | 64 0.01
Average:
75 | 62 0.12
Scattered Clouds
Actual:
80 | 68 0.00
Average:
75 | 62 0.12
Rain
Actual:
71 | 66 1.60
Average:
75 | 61 0.12
Mostly Cloudy
Actual:
72 | 63 0.00
Average:
74 | 61 0.12
Clear
Actual:
80 | 63 0.01
Average:
74 | 61 0.12
Partly Cloudy
Actual:
81 | 70 0.01
Average:
74 | 61 0.12
Partly Cloudy
Actual:
82 | 71 0.00
Average:
74 | 61 0.12
Scattered Clouds
Actual:
82 | 69 0.00
Average:
74 | 61 0.12
Partly Cloudy
Actual:
82 | 69 0.01
Average:
74 | 61 0.12
Rain
Actual:
79 | 61 0.05
Average:
74 | 61 0.12
Scattered Clouds
Actual:
75 | 63 0.00
Average:
73 | 60 0.13
Clear
Actual:
80 | 64 0.00
Average:
73 | 60 0.13
Rain
Actual:
82 | 68 0.07
Average:
73 | 60 0.13
Rain
Actual:
81 | 73 0.10
Average:
73 | 60 0.13
Rain
Actual:
80 | 70 0.02
Average:
73 | 60 0.13
Rain
Actual:
78 | 69 0.01
Average:
72 | 59 0.13
Clear
Actual:
- | - -
Average:
- | - -
Clear
Actual:
75 | 60 0.00
Average:
72 | 59 0.13
Clear
Actual:
81 | 62 0.01
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

2011 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 84 78 72 73 71 68 94 82 65 29.99 29.88 29.76 10 9 5 12 6 21 0.00  
2 87 75 66 72 65 58 94 79 40 29.75 29.69 29.62 10 8 1 15 5 21 0.57 Rain , Thunderstorm
3 75 68 63 65 63 60 94 79 68 29.83 29.75 29.68 10 9 2 9 2 18 0.01  
4 75 68 64 64 62 60 94 78 64 30.03 29.93 29.83 10 10 10 16 4 22 0.00  
5 75 68 64 63 61 59 90 78 64 30.14 30.09 30.03 10 10 10 12 3 - 0.00  
6 79 72 66 70 67 63 88 83 74 30.11 30.04 29.95 10 10 10 13 6 22 0.00 Rain
7 73 69 66 71 67 63 94 90 87 29.95 29.75 29.56 10 5 0 15 8 25 0.86 Fog , Rain
8 80 74 69 73 70 66 94 88 72 29.62 29.53 29.48 10 5 0 7 3 - 0.00 Fog
9 77 72 66 68 65 63 94 84 64 29.72 29.67 29.61 10 8 0 14 4 22 0.05 Fog , Rain
10 81 72 64 72 66 62 94 82 65 29.68 29.56 29.49 10 9 0 15 8 25 0.00 Fog , Rain
11 82 72 63 66 62 58 93 73 50 29.89 29.79 29.69 10 10 10 9 2 17 0.00  
12 79 69 61 64 58 55 90 68 48 30.04 29.96 29.89 10 10 10 7 3 - 0.00  
13 84 73 64 69 64 59 90 73 48 30.09 30.05 30.03 10 10 10 7 2 - 0.01  
14 80 74 68 70 66 61 94 82 66 30.04 29.99 29.92 10 10 6 9 5 16 0.00  
15 71 68 66 68 64 63 94 90 78 29.90 29.70 29.58 10 5 1 21 11 31 1.60 Rain
16 72 67 63 64 60 58 90 80 66 29.99 29.81 29.61 10 10 10 13 7 25 0.00  
17 80 71 63 68 64 60 93 77 60 30.13 30.09 30.00 10 10 7 6 3 - 0.01  
18 81 76 70 72 69 67 94 85 74 30.10 30.05 29.98 10 10 7 14 7 21 0.01  
19 82 78 71 73 70 68 90 85 72 29.99 29.96 29.94 10 10 10 12 8 23 0.00  
20 82 75 69 72 69 65 94 83 67 30.02 29.99 29.95 10 10 10 12 5 17 0.00  
21 82 76 69 73 70 68 94 86 74 30.03 29.97 29.85 10 10 7 14 8 22 0.01  
22 79 70 61 72 63 52 94 75 43 29.88 29.76 29.69 10 8 2 14 8 23 0.05 Rain
23 75 69 63 58 54 46 75 60 35 30.10 29.99 29.88 10 10 10 9 4 - 0.00  
24 80 71 64 64 61 57 87 71 54 30.16 30.10 30.05 10 10 10 14 6 21 0.00  
25 82 74 68 73 70 64 94 85 74 30.04 29.97 29.90 10 10 5 16 9 26 0.07 Rain
26 81 77 73 73 71 69 94 83 70 30.00 29.98 29.93 10 8 2 13 7 23 0.10 Rain
27 80 75 70 73 70 68 97 90 78 29.98 29.93 29.82 10 6 0 13 4 22 0.02 Fog , Rain
28 78 74 69 72 68 65 94 84 69 29.79 29.47 29.27 9 6 2 28 16 55 0.01 Rain
29 - - - - - - - - - - - - - - - - - - -  
30 75 68 60 59 54 49 87 67 41 30.16 30.09 30.02 10 10 10 12 4 - 0.00  
31 81 72 62 61 58 55 87 68 43 30.21 30.19 30.16 10 10 10 9 4 - 0.01