Weather History for Chatham, MA

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 59 °F 46 °F 33 °F
Mean Temperature 52 °F 40 °F 28 °F
Min Temperature 48 °F 34 °F 21 °F
Degree Days  
Heating Degree Days (base 65) 37 25 12 776
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 2 0 0 2
Dew Point  
Dew Point 58 °F 35 °F 12 °F
Precipitation  
Precipitation 1.21 in 0.19 in 0.00 in 5.94 in
Snowdepth - - - -
Wind  
Wind 33 mph 7 mph 0 mph
Gust Wind 54 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.62 in 29.97 in 29.18 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 08, 2012 Rise Set
Actual Time 6:54 AM EST 4:09 PM EST
Civil Twilight 6:23 AM EST 4:40 PM EST
Nautical Twilight 5:48 AM EST 5:15 PM EST
Astronomical Twilight 5:14 AM EST 5:49 PM EST
Moon 1:12 AM EST (12/8) 12:40 PM EST (12/8)
Length of Visible Light 10h 17m
Length of Day
9h 14m
Waning Crescent, 28% of the Moon is Illuminated
Dec 8
Waning Crescent
Dec 13
New
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Weather History Calendar

Precipitation Actual month total 5.94 Average Month Total: 3.79
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
46 | 36 0.03
Average:
45 | 33 0.11
Rain
Actual:
53 | 48 0.02
Average:
44 | 32 0.11
Partly Cloudy
Actual:
57 | 37 0.00
Average:
44 | 32 0.11
Partly Cloudy
Actual:
54 | 36 0.00
Average:
44 | 32 0.11
Rain
Actual:
54 | 37 0.01
Average:
44 | 32 0.12
Partly Cloudy
Actual:
39 | 25 0.00
Average:
44 | 32 0.12
Rain
Actual:
46 | 26 0.02
Average:
44 | 32 0.12
Rain
Actual:
55 | 46 0.43
Average:
44 | 31 0.12
Rain
Actual:
48 | 42 0.08
Average:
44 | 31 0.12
Thunderstorm
Actual:
59 | 46 1.11
Average:
44 | 31 0.12
Rain
Actual:
53 | 37 0.03
Average:
44 | 31 0.13
Scattered Clouds
Actual:
39 | 30 0.00
Average:
43 | 31 0.13
Partly Cloudy
Actual:
43 | 28 0.00
Average:
43 | 30 0.13
Clear
Actual:
46 | 28 0.00
Average:
43 | 30 0.13
Scattered Clouds
Actual:
44 | 32 0.00
Average:
43 | 30 0.13
Rain
Actual:
41 | 34 0.20
Average:
42 | 29 0.13
Rain
Actual:
48 | 43 0.24
Average:
42 | 29 0.13
Rain
Actual:
52 | 43 0.25
Average:
42 | 29 0.13
Rain
Actual:
44 | 39 0.08
Average:
41 | 28 0.13
Rain
Actual:
43 | 37 0.01
Average:
41 | 28 0.13
Rain
Actual:
53 | 42 0.67
Average:
40 | 27 0.13
Rain
Actual:
42 | 30 0.00
Average:
40 | 27 0.12
Scattered Clouds
Actual:
39 | 30 0.00
Average:
40 | 27 0.12
Scattered Clouds
Actual:
39 | 28 0.00
Average:
39 | 26 0.12
Rain
Actual:
44 | 35 0.13
Average:
39 | 26 0.12
Rain
Actual:
39 | 30 0.22
Average:
39 | 26 0.12
Snow
Actual:
52 | 33 0.82
Average:
39 | 26 0.12
Snow
Actual:
37 | 28 0.00
Average:
39 | 26 0.12
Snow
Actual:
42 | 26 1.21
Average:
39 | 26 0.12
Snow
Actual:
33 | 25 0.38
Average:
39 | 26 0.12
Scattered Clouds
Actual:
35 | 21 0.00
Average:
38 | 25 0.12
 

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
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 46 41 36 41 33 21 87 75 55 30.62 30.56 30.50 10 10 9 10 8 18 0.03 Rain
2 53 50 48 50 48 42 97 88 80 30.48 30.30 30.11 10 10 8 16 10 26 0.02 Rain
3 57 48 37 48 44 35 94 82 55 30.30 30.14 30.07 10 9 4 13 8 24 0.00  
4 54 45 36 49 44 34 97 90 77 30.35 30.26 30.08 10 10 8 9 4 21 0.00  
5 54 46 37 52 43 21 100 78 51 30.09 29.95 29.89 10 8 2 14 8 25 0.01 Rain
6 39 32 25 25 23 19 88 66 52 30.32 30.26 30.10 10 10 10 12 7 24 0.00  
7 46 36 26 45 36 22 96 82 71 30.32 30.20 30.08 10 10 8 10 3 20 0.02 Rain
8 55 50 46 55 48 45 100 97 93 30.07 29.93 29.83 10 5 1 10 3 22 0.43 Rain
9 48 45 42 46 42 34 100 87 58 30.30 30.12 29.98 10 6 0 10 4 18 0.08 Fog , Rain
10 59 52 46 58 53 43 100 97 86 30.17 29.78 29.53 10 4 0 15 10 33 1.11 Fog , Rain , Thunderstorm
11 53 45 37 54 42 27 100 83 60 30.14 29.80 29.56 10 8 1 9 6 21 0.03 Rain
12 39 34 30 28 26 24 82 69 62 30.43 30.32 30.16 10 10 10 8 4 - 0.00  
13 43 36 28 31 27 25 88 72 49 30.45 30.39 30.32 10 10 7 4 1 - 0.00  
14 46 37 28 34 29 25 92 70 56 30.30 30.18 30.08 10 10 10 15 4 25 0.00  
15 44 38 32 31 26 22 85 64 51 30.34 30.28 30.17 10 10 10 10 3 17 0.00  
16 41 38 34 39 30 22 93 75 59 30.33 30.20 30.05 10 8 3 17 9 28 0.20 Rain
17 48 46 43 47 45 40 97 93 89 30.01 29.91 29.74 10 6 2 17 14 24 0.24 Rain
18 52 48 43 52 48 41 100 96 92 29.73 29.51 29.43 10 4 1 14 9 21 0.25 Rain
19 44 42 39 41 36 33 93 79 70 29.98 29.67 29.44 10 9 2 16 10 36 0.08 Rain
20 43 40 37 37 34 30 93 79 66 30.18 30.11 29.97 10 10 7 9 5 20 0.01 Rain
21 53 48 42 52 44 31 100 86 65 30.04 29.45 29.18 10 7 0 25 13 41 0.67 Fog , Rain
22 42 36 30 34 26 16 81 63 46 29.66 29.43 29.29 10 10 10 15 9 28 0.00 Rain
23 39 34 30 25 20 16 72 56 41 29.89 29.83 29.68 10 10 10 14 8 26 0.00  
24 39 34 28 27 22 19 79 64 47 30.09 30.03 29.91 10 10 10 7 3 18 0.00  
25 44 40 35 43 37 30 96 90 79 30.19 30.03 29.96 10 9 2 10 3 25 0.13 Rain
26 39 34 30 36 29 25 89 74 62 30.30 30.20 29.92 10 9 4 24 6 33 0.22 Rain
27 52 42 33 52 42 29 100 92 85 29.90 29.42 29.22 8 4 1 33 17 54 0.82 Rain , Snow
28 37 32 28 30 24 23 85 71 57 30.01 29.84 29.57 10 10 7 14 10 26 0.00 Snow
29 42 34 26 39 31 22 96 85 70 30.03 29.61 29.19 10 6 1 22 6 34 1.21 Rain , Snow
30 33 30 25 32 24 14 93 77 56 29.92 29.54 29.26 10 8 1 18 13 37 0.38 Snow
31 35 28 21 27 20 12 78 69 60 30.06 29.96 29.80 10 10 10 13 8 36 0.00