Weather History for Chatham, MA

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Month of January, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 53 °F 42 °F 23 °F
Mean Temperature 46 °F 36 °F 18 °F
Min Temperature 39 °F 29 °F 14 °F
Degree Days  
Heating Degree Days (base 65) 46 29 18 901
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 52 °F 28 °F 2 °F
Precipitation  
Precipitation 0.84 in 0.10 in 0.00 in 3.06 in
Snowdepth - - - -
Wind  
Wind 23 mph 7 mph 0 mph
Gust Wind 50 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.59 in 29.99 in 29.28 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Jan. 21, 2012 Rise Set
Actual Time 7:01 AM EST 4:41 PM EST
Civil Twilight 6:31 AM EST 5:11 PM EST
Nautical Twilight 5:57 AM EST 5:45 PM EST
Astronomical Twilight 5:24 AM EST 6:18 PM EST
Moon 5:30 AM EST (1/21) 3:12 PM EST (1/21)
Length of Visible Light 10h 40m
Length of Day
9h 39m
Waning Crescent, 3% of the Moon is Illuminated
Jan 21
Waning Crescent
Jan 23
New
Jan 30
First Quarter
Feb 7
Full
Feb 14
Last Quarter

Weather History Calendar

Precipitation Actual month total 3.06 Average Month Total: 3.93
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Rain
Actual:
48 | 33 0.00
Average:
39 | 26 0.12
Rain
Actual:
48 | 34 0.06
Average:
39 | 26 0.12
Partly Cloudy
Actual:
35 | 21 0.00
Average:
39 | 26 0.12
Snow
Actual:
33 | 17 0.00
Average:
39 | 26 0.12
Partly Cloudy
Actual:
37 | 27 0.00
Average:
38 | 25 0.13
Snow
Actual:
45 | 28 0.01
Average:
38 | 25 0.13
Clear
Actual:
53 | 35 0.00
Average:
38 | 25 0.13
Scattered Clouds
Actual:
45 | 35 0.01
Average:
37 | 24 0.13
Scattered Clouds
Actual:
37 | 30 0.00
Average:
37 | 24 0.13
Partly Cloudy
Actual:
45 | 34 0.00
Average:
36 | 23 0.13
Scattered Clouds
Actual:
39 | 28 0.00
Average:
36 | 23 0.13
Thunderstorm
Actual:
50 | 39 0.64
Average:
35 | 22 0.13
Rain
Actual:
51 | 32 0.06
Average:
34 | 21 0.14
Scattered Clouds
Actual:
36 | 24 0.00
Average:
34 | 21 0.14
Snow
Actual:
23 | 14 0.00
Average:
34 | 21 0.14
Rain
Actual:
39 | 17 0.00
Average:
33 | 21 0.14
Rain
Actual:
46 | 36 0.19
Average:
33 | 20 0.14
Scattered Clouds
Actual:
52 | 25 0.00
Average:
33 | 20 0.13
Partly Cloudy
Actual:
37 | 24 0.00
Average:
33 | 21 0.13
Snow
Actual:
35 | 23 0.09
Average:
33 | 21 0.13
Snow
Actual:
33 | 21 0.05
Average:
33 | 21 0.13
Overcast
Actual:
33 | 28 0.12
Average:
33 | 21 0.13
Rain
Actual:
46 | 33 0.62
Average:
33 | 21 0.13
Rain
Actual:
50 | 39 0.17
Average:
33 | 21 0.12
Scattered Clouds
Actual:
43 | 33 0.00
Average:
33 | 22 0.12
Rain
Actual:
41 | 33 0.20
Average:
34 | 22 0.12
Rain
Actual:
52 | 39 0.84
Average:
34 | 23 0.12
Scattered Clouds
Actual:
46 | 37 0.00
Average:
34 | 23 0.12
Clear
Actual:
42 | 36 0.00
Average:
35 | 23 0.11
Rain
Actual:
39 | 30 0.00
Average:
35 | 24 0.11
Partly Cloudy
Actual:
48 | 28 0.00
Average:
35 | 24 0.11
 

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
Jan high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 48 40 33 46 39 33 100 90 71 30.09 29.97 29.71 10 8 1 13 4 21 0.00 Rain
2 48 41 34 48 32 18 100 68 41 29.75 29.66 29.58 10 9 5 16 9 29 0.06 Rain
3 35 28 21 20 15 11 72 58 45 29.96 29.82 29.73 10 10 9 13 6 24 0.00  
4 33 25 17 24 12 2 81 65 38 30.09 30.02 29.92 10 8 2 10 7 21 0.00 Snow
5 37 32 27 22 17 10 67 55 47 29.93 29.86 29.76 10 10 10 10 5 17 0.00  
6 45 36 28 40 30 17 97 79 59 29.98 29.89 29.77 10 8 2 14 4 21 0.01 Snow
7 53 45 35 43 40 34 97 88 66 29.89 29.78 29.70 10 10 7 10 6 18 0.00  
8 45 40 35 33 27 22 73 59 48 30.24 30.11 29.91 10 10 10 10 5 17 0.01  
9 37 34 30 27 21 17 70 60 46 30.31 30.22 30.04 10 10 10 9 6 - 0.00  
10 45 40 34 36 28 25 81 65 49 30.01 29.88 29.77 10 10 10 9 5 - 0.00  
11 39 34 28 32 27 22 89 70 49 30.14 30.09 29.96 10 10 10 10 5 18 0.00  
12 50 44 39 50 42 33 100 93 70 30.06 29.63 29.36 10 4 0 23 15 37 0.64 Fog , Rain , Thunderstorm
13 51 42 32 50 37 16 100 83 52 29.66 29.46 29.31 10 8 2 23 10 50 0.06 Rain
14 36 31 24 19 13 3 59 48 37 29.99 29.83 29.68 10 10 10 13 9 31 0.00  
15 23 18 14 11 8 4 79 66 46 30.47 30.22 30.01 10 6 0 14 8 25 0.00 Snow
16 39 28 17 36 17 8 87 67 56 30.59 30.45 30.20 10 10 8 15 7 30 0.00 Rain
17 46 41 36 45 39 35 100 92 73 30.17 29.90 29.57 10 7 2 14 9 25 0.19 Rain
18 52 39 25 45 22 5 93 54 38 30.14 29.80 29.49 10 10 6 16 10 32 0.00  
19 37 30 24 25 19 12 72 64 58 30.26 30.16 29.98 10 10 9 12 6 31 0.00  
20 35 30 23 34 25 13 100 79 50 30.29 30.05 29.95 10 7 0 15 8 29 0.09 Fog , Rain , Snow
21 33 27 21 31 26 15 100 87 61 30.29 30.14 30.02 10 4 0 15 4 26 0.05 Fog , Snow
22 33 30 28 26 23 20 85 74 69 30.56 30.48 30.28 10 10 10 13 7 22 0.12  
23 46 40 33 47 40 27 100 91 75 30.52 30.24 29.97 10 6 0 13 7 21 0.62 Fog , Rain
24 50 44 39 48 44 35 100 97 76 30.03 29.95 29.92 10 2 0 13 8 21 0.17 Fog , Rain
25 43 38 33 34 27 25 78 64 49 30.20 30.15 30.04 10 10 10 12 6 22 0.00  
26 41 37 33 39 32 28 100 83 70 30.23 30.14 30.02 10 9 6 8 3 - 0.20 Rain
27 52 46 39 52 46 32 100 97 73 29.98 29.56 29.28 10 3 0 16 10 28 0.84 Fog , Rain
28 46 42 37 37 31 25 82 69 46 30.02 29.92 29.64 10 10 10 15 9 33 0.00  
29 42 39 36 36 23 13 82 56 36 30.12 30.06 29.93 10 10 10 15 8 25 0.00  
30 39 36 30 33 22 11 79 57 33 30.31 30.11 29.97 10 10 10 16 6 31 0.00 Rain
31 48 38 28 39 30 16 93 71 56 30.32 30.15 30.05 10 10 8 13 4 22 0.00