Weather History for Chatham, MA

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Month of May, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 79 °F 64 °F 48 °F
Mean Temperature 69 °F 57 °F 46 °F
Min Temperature 62 °F 51 °F 39 °F
Degree Days  
Heating Degree Days (base 65) 19 8 0 255
Cooling Degree Days (base 65) 4 0 0 10
Growing Degree Days (base 50) 19 7 0 223
Dew Point  
Dew Point 66 °F 51 °F 24 °F
Precipitation  
Precipitation 1.83 in 0.17 in 0.00 in 5.14 in
Snowdepth - - - -
Wind  
Wind 21 mph 6 mph 0 mph
Gust Wind 39 mph 19 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.32 in 30.04 in 29.38 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

May. 11, 2012 Rise Set
Actual Time 5:24 AM EDT 7:49 PM EDT
Civil Twilight 4:52 AM EDT 8:20 PM EDT
Nautical Twilight 4:13 AM EDT 8:59 PM EDT
Astronomical Twilight 3:30 AM EDT 9:43 PM EDT
Moon 12:26 AM EDT (5/11) 10:53 AM EDT (5/11)
Length of Visible Light 15h 28m
Length of Day
14h 25m
Waning Gibbous, 63% of the Moon is Illuminated
May 11
Waning Gibbous
May 12
Last Quarter
May 20
New
May 28
First Quarter
Jun 4
Full

Weather History Calendar

Precipitation Actual month total 5.14 Average Month Total: 2.87
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
48 | 44 0.54
Average:
56 | 42 0.09
Overcast
Actual:
52 | 46 0.01
Average:
56 | 42 0.08
Rain
Actual:
53 | 46 0.00
Average:
56 | 42 0.08
Rain
Actual:
53 | 46 0.06
Average:
57 | 43 0.08
Overcast
Actual:
54 | 46 0.01
Average:
57 | 43 0.08
Fog
Actual:
57 | 39 0.00
Average:
57 | 43 0.08
Clear
Actual:
63 | 39 0.01
Average:
57 | 43 0.08
Rain
Actual:
54 | 51 0.00
Average:
57 | 44 0.08
Rain
Actual:
57 | 53 1.11
Average:
58 | 44 0.09
Rain
Actual:
63 | 51 1.14
Average:
58 | 44 0.09
Partly Cloudy
Actual:
61 | 46 0.01
Average:
58 | 44 0.09
Clear
Actual:
71 | 46 0.00
Average:
58 | 44 0.09
Clear
Actual:
66 | 55 0.00
Average:
58 | 44 0.09
Scattered Clouds
Actual:
64 | 57 0.00
Average:
59 | 44 0.09
Rain
Actual:
68 | 55 0.13
Average:
59 | 44 0.09
Thunderstorm
Actual:
62 | 55 1.83
Average:
59 | 45 0.09
Fog
Actual:
66 | 48 0.00
Average:
59 | 45 0.10
Clear
Actual:
63 | 46 0.01
Average:
59 | 45 0.10
Clear
Actual:
64 | 48 0.00
Average:
59 | 45 0.10
Clear
Actual:
68 | 48 0.00
Average:
59 | 46 0.10
Rain
Actual:
60 | 53 0.07
Average:
60 | 46 0.10
Rain
Actual:
60 | 57 0.16
Average:
60 | 47 0.10
Rain
Actual:
72 | 57 0.02
Average:
60 | 47 0.10
Fog
Actual:
68 | 53 0.00
Average:
61 | 47 0.10
Fog
Actual:
61 | 53 0.01
Average:
61 | 48 0.10
Fog
Actual:
77 | 59 0.00
Average:
61 | 48 0.10
Fog
Actual:
71 | 57 0.01
Average:
62 | 48 0.10
Fog
Actual:
73 | 55 0.00
Average:
62 | 49 0.10
Fog
Actual:
72 | 53 0.00
Average:
62 | 49 0.10
Rain
Actual:
75 | 62 0.00
Average:
62 | 49 0.10
Fog
Actual:
79 | 60 0.01
Average:
63 | 49 0.10
 

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
May high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 48 46 44 46 43 35 100 89 59 30.28 30.11 30.02 10 5 2 21 9 39 0.54 Rain
2 52 49 46 47 45 42 97 90 80 30.24 30.19 30.09 10 8 2 13 8 20 0.01  
3 53 48 46 45 43 41 90 82 71 30.22 30.19 30.13 10 10 10 8 5 - 0.00 Rain
4 53 49 46 50 48 45 100 93 83 30.13 30.02 29.95 10 5 2 9 4 - 0.06 Rain
5 54 50 46 50 47 46 100 93 86 30.09 30.01 29.95 10 6 1 6 3 - 0.01  
6 57 49 39 47 43 32 100 83 42 30.14 30.10 30.06 10 6 0 12 5 20 0.00 Fog
7 63 50 39 49 43 35 96 70 38 30.17 30.14 30.11 10 10 10 10 5 - 0.01  
8 54 52 51 50 45 40 89 76 59 30.16 30.08 29.96 10 10 10 17 7 30 0.00 Rain
9 57 55 53 57 54 50 100 96 89 29.94 29.79 29.65 10 4 1 15 10 29 1.11 Rain
10 63 57 51 56 53 39 100 90 63 29.71 29.49 29.38 10 6 1 17 9 31 1.14 Rain
11 61 53 46 49 42 38 89 65 46 30.05 29.89 29.73 10 10 10 10 6 18 0.01  
12 71 58 46 50 42 24 93 63 18 30.16 30.11 30.04 10 10 10 13 4 29 0.00  
13 66 60 55 54 53 50 87 78 68 30.19 30.16 30.13 10 10 10 12 7 18 0.00  
14 64 60 57 56 55 53 87 82 75 30.23 30.19 30.14 10 10 10 13 8 21 0.00  
15 68 60 55 55 53 51 100 86 65 30.22 30.14 30.05 10 8 2 15 8 24 0.13 Rain
16 62 58 55 61 58 54 100 95 88 30.02 29.94 29.89 10 2 0 14 10 26 1.83 Fog , Rain , Thunderstorm
17 66 57 48 58 48 36 100 72 33 30.17 30.01 29.88 10 7 0 12 6 25 0.00 Fog
18 63 54 46 49 42 36 93 63 39 30.28 30.22 30.17 10 10 10 8 3 - 0.01  
19 64 55 48 45 38 32 80 52 32 30.19 30.17 30.15 10 10 2 15 6 20 0.00  
20 68 57 48 48 41 33 90 56 31 30.32 30.27 30.18 10 10 10 8 3 - 0.00  
21 60 56 53 58 55 47 100 95 74 30.30 30.23 30.09 10 2 0 10 5 18 0.07 Fog , Rain
22 60 58 57 59 57 55 100 96 88 30.07 29.91 29.80 10 3 0 13 5 - 0.16 Fog , Rain
23 72 63 57 62 58 55 100 92 76 30.10 29.93 29.83 10 6 0 7 3 - 0.02 Fog , Rain
24 68 60 53 59 56 53 100 93 75 30.29 30.22 30.10 10 3 0 9 3 - 0.00 Fog
25 61 57 53 58 56 52 100 97 87 30.30 30.25 30.17 10 2 0 8 5 - 0.01 Fog
26 77 67 59 66 62 59 100 93 71 30.16 30.12 30.06 10 4 0 10 7 20 0.00 Fog
27 71 64 57 63 58 50 100 83 51 30.16 30.11 30.07 10 7 0 12 7 20 0.01 Fog
28 73 63 55 65 59 55 100 90 73 30.06 30.00 29.97 10 5 0 14 7 - 0.00 Fog
29 72 62 53 66 60 54 100 93 78 29.98 29.87 29.78 10 4 0 8 5 16 0.00 Fog
30 75 69 62 66 64 60 100 90 60 29.77 29.75 29.72 10 6 0 9 6 18 0.00 Fog , Rain
31 79 68 60 64 59 53 100 80 43 29.88 29.76 29.72 10 6 0 12 2 - 0.01 Fog