Weather History for Chatham, MA

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Month of September, 2014

  Max Avg Min Sum
Temperature  
Max Temperature 81 °F 72 °F 60 °F
Mean Temperature 75 °F 65 °F 54 °F
Min Temperature 72 °F 58 °F 46 °F
Degree Days  
Heating Degree Days (base 65) 12 2 0 72
Cooling Degree Days (base 65) 10 2 0 63
Growing Degree Days (base 50) 25 15 4 440
Dew Point  
Dew Point 73 °F 58 °F 35 °F
Precipitation  
Precipitation 0.86 in 0.04 in 0.00 in 1.34 in
Snowdepth - - - -
Wind  
Wind 16 mph 6 mph 0 mph
Gust Wind 28 mph 19 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.63 in 30.10 in 29.55 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 08, 2014 Rise Set
Actual Time 6:13 AM EDT 7:01 PM EDT
Civil Twilight 5:44 AM EDT 7:29 PM EDT
Nautical Twilight 5:11 AM EDT 8:02 PM EDT
Astronomical Twilight 4:36 AM EDT 8:37 PM EDT
Moon 6:39 PM EDT (9/8) 5:33 AM EDT (9/8)
Length of Visible Light 13h 44m
Length of Day
12h 48m
Full, 100% of the Moon is Illuminated
Sep 8
Full
Sep 8
Full
Sep 15
Last Quarter
Sep 24
New
Oct 1
First Quarter

Weather History Calendar

Precipitation Actual month total 1.34 Average Month Total: 3.46
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
79 | 71 0.14
Average:
72 | 59 0.13
Fog
Actual:
78 | 70 0.00
Average:
72 | 59 0.13
Clear
Actual:
81 | 66 0.00
Average:
71 | 59 0.13
Clear
Actual:
81 | 62 0.00
Average:
71 | 58 0.13
Scattered Clouds
Actual:
80 | 66 0.00
Average:
71 | 58 0.13
Overcast
Actual:
75 | 72 0.00
Average:
71 | 58 0.13
Rain
Actual:
75 | 57 0.03
Average:
71 | 58 0.13
Clear
Actual:
73 | 55 0.00
Average:
70 | 58 0.13
Partly Cloudy
Actual:
70 | 64 0.00
Average:
70 | 57 0.13
Mostly Cloudy
Actual:
72 | 64 0.00
Average:
70 | 57 0.13
Partly Cloudy
Actual:
73 | 57 0.00
Average:
69 | 57 0.12
Partly Cloudy
Actual:
71 | 60 0.00
Average:
69 | 56 0.12
Rain
Actual:
68 | 57 0.03
Average:
69 | 56 0.12
Partly Cloudy
Actual:
64 | 50 0.01
Average:
69 | 56 0.12
Partly Cloudy
Actual:
68 | 48 0.00
Average:
68 | 55 0.12
Partly Cloudy
Actual:
71 | 55 0.00
Average:
68 | 55 0.12
Clear
Actual:
73 | 53 0.00
Average:
68 | 55 0.12
Scattered Clouds
Actual:
72 | 52 0.00
Average:
68 | 54 0.11
Partly Cloudy
Actual:
60 | 46 0.00
Average:
67 | 54 0.11
Scattered Clouds
Actual:
68 | 50 0.00
Average:
67 | 54 0.11
Rain
Actual:
73 | 62 0.01
Average:
67 | 54 0.11
Partly Cloudy
Actual:
78 | 55 0.00
Average:
66 | 53 0.11
Clear
Actual:
66 | 53 0.00
Average:
66 | 53 0.10
Clear
Actual:
66 | 53 0.00
Average:
66 | 53 0.10
Rain
Actual:
63 | 57 0.86
Average:
65 | 52 0.10
Rain
Actual:
68 | 53 0.21
Average:
65 | 52 0.10
Clear
Actual:
78 | 53 0.00
Average:
64 | 51 0.10
Clear
Actual:
75 | 55 0.00
Average:
64 | 51 0.09
Partly Cloudy
Actual:
73 | 64 0.00
Average:
64 | 50 0.09
Rain
Actual:
64 | 61 0.05
Average:
63 | 49 0.09
 

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

2014 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  
1 79 75 71 73 71 69 100 93 79 30.02 29.98 29.95 10 7 2 13 9 23 0.14 Rain
2 78 74 70 72 71 69 100 94 81 29.96 29.91 29.81 10 4 0 12 6 18 0.00 Fog
3 81 73 66 70 64 56 93 74 43 30.09 29.93 29.76 10 10 9 14 8 24 0.00  
4 81 72 62 68 62 59 90 71 50 30.20 30.16 30.10 10 10 10 10 3 - 0.00  
5 80 73 66 72 70 64 97 87 71 30.20 30.14 30.04 10 10 8 14 8 22 0.00  
6 75 74 72 73 72 71 97 94 90 30.03 29.92 29.83 10 6 1 14 11 25 0.00  
7 75 65 57 70 61 55 93 78 57 30.22 30.03 29.89 10 10 7 13 6 23 0.03 Rain
8 73 64 55 58 54 50 96 69 49 30.39 30.33 30.22 10 10 10 16 5 21 0.00  
9 70 67 64 61 57 53 84 72 63 30.34 30.28 30.17 10 10 10 14 10 20 0.00  
10 72 68 64 63 62 59 90 80 71 30.15 30.11 30.06 10 10 10 14 9 20 0.00  
11 73 65 57 69 63 56 97 84 68 30.05 29.93 29.85 10 10 7 13 5 24 0.00  
12 71 66 60 69 58 51 93 75 59 30.22 30.03 29.89 10 10 7 13 6 20 0.00  
13 68 62 57 62 55 50 93 73 54 30.25 30.17 30.08 10 10 10 13 7 22 0.03 Rain
14 64 56 50 63 52 46 100 77 56 30.22 30.17 30.08 10 10 10 12 5 22 0.01  
15 68 57 48 51 47 43 96 73 45 30.23 30.19 30.12 10 10 10 7 3 - 0.00  
16 71 60 55 55 52 48 93 74 58 30.12 30.03 29.97 10 10 10 8 2 - 0.00  
17 73 62 53 56 53 47 97 73 53 30.02 30.00 29.97 10 10 10 8 4 - 0.00  
18 72 62 52 53 49 44 86 65 39 30.10 29.99 29.94 10 10 10 8 4 - 0.00  
19 60 54 46 50 39 35 73 56 44 30.45 30.33 30.12 10 10 10 13 9 21 0.00  
20 68 58 50 58 49 38 86 71 60 30.42 30.31 30.15 10 10 10 13 5 18 0.00  
21 73 67 62 68 65 58 100 93 78 30.12 29.77 29.55 10 7 0 12 7 23 0.01 Fog , Rain
22 78 67 55 66 58 42 97 75 35 30.08 29.72 29.55 10 9 2 14 6 28 0.00  
23 66 58 53 48 42 37 83 58 43 30.44 30.28 30.11 10 10 10 12 7 24 0.00  
24 66 60 53 57 52 49 90 76 65 30.63 30.57 30.45 10 10 10 13 6 20 0.00  
25 63 60 57 60 57 49 97 88 72 30.56 30.35 30.21 10 7 3 12 7 18 0.86 Rain
26 68 60 53 60 58 51 97 89 68 30.19 30.17 30.14 10 8 4 13 10 21 0.21 Rain
27 78 64 53 60 56 51 97 78 50 30.19 30.16 30.14 10 10 5 8 3 - 0.00  
28 75 65 55 63 59 54 97 84 59 30.19 30.12 30.03 10 9 2 12 3 20 0.00  
29 73 68 64 66 63 61 93 88 78 30.02 29.98 29.95 10 10 6 10 5 17 0.00  
30 64 64 61 65 60 58 100 94 87 30.02 29.98 29.95 10 7 1 9 5 20 0.05 Rain