History for Chatham, MA

Month of December, 2012 — View Current Conditions
Month of December, 2012
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Daily Weekly Monthly Custom
  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 Graph
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Date:
Astronomy
May. 25, 2013 Rise Set
Actual Time 6:59 AM EST 4:10 PM EST
Civil Twilight 6:28 AM EST 4:41 PM EST
Nautical Twilight 5:53 AM EST 5:16 PM EST
Astronomical Twilight 5:19 AM EST 5:50 PM EST
Moon 8:00 AM EST (12/14) 5:59 PM EST (12/14)
Length Of Visible Light 10h 13m
Length of Day
9h 10m
Waxing Crescent, 3% of the Moon is Illuminated
Dec 14
Waxing Crescent
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
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Monthly Calendar Overview
Print This Calendar Precipitation: Actual month total 5.94 Average month total 3.79
« Previous Month « 2011 December 2012 2013 » Next Month »
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
1 Rain
Actual: 46 | 36
Precip: 0.03
Average: 45 | 33
Precip: 0.11
2 Rain
Actual: 53 | 48
Precip: 0.02
Average: 44 | 32
Precip: 0.11
3 Partly Cloudy
Actual: 57 | 37
Precip: 0.00
Average: 44 | 32
Precip: 0.11
4 Partly Cloudy
Actual: 54 | 36
Precip: 0.00
Average: 44 | 32
Precip: 0.11
5 Rain
Actual: 54 | 37
Precip: 0.01
Average: 44 | 32
Precip: 0.12
6 Partly Cloudy
Actual: 39 | 25
Precip: 0.00
Average: 44 | 32
Precip: 0.12
7 Rain
Actual: 46 | 26
Precip: 0.02
Average: 44 | 32
Precip: 0.12
8 Rain
Actual: 55 | 46
Precip: 0.43
Average: 44 | 31
Precip: 0.12
9 Rain
Actual: 48 | 42
Precip: 0.08
Average: 44 | 31
Precip: 0.12
10 Thunderstorm
Actual: 59 | 46
Precip: 1.11
Average: 44 | 31
Precip: 0.12
11 Rain
Actual: 53 | 37
Precip: 0.03
Average: 44 | 31
Precip: 0.13
12 Scattered Clouds
Actual: 39 | 30
Precip: 0.00
Average: 43 | 31
Precip: 0.13
13 Partly Cloudy
Actual: 43 | 28
Precip: 0.00
Average: 43 | 30
Precip: 0.13
14 Clear
Actual: 46 | 28
Precip: 0.00
Average: 43 | 30
Precip: 0.13
15 Scattered Clouds
Actual: 44 | 32
Precip: 0.00
Average: 43 | 30
Precip: 0.13
16 Rain
Actual: 41 | 34
Precip: 0.20
Average: 42 | 29
Precip: 0.13
17 Rain
Actual: 48 | 43
Precip: 0.24
Average: 42 | 29
Precip: 0.13
18 Rain
Actual: 52 | 43
Precip: 0.25
Average: 42 | 29
Precip: 0.13
19 Rain
Actual: 44 | 39
Precip: 0.08
Average: 41 | 28
Precip: 0.13
20 Rain
Actual: 43 | 37
Precip: 0.01
Average: 41 | 28
Precip: 0.13
21 Rain
Actual: 53 | 42
Precip: 0.67
Average: 40 | 27
Precip: 0.13
22 Rain
Actual: 42 | 30
Precip: 0.00
Average: 40 | 27
Precip: 0.12
23 Scattered Clouds
Actual: 39 | 30
Precip: 0.00
Average: 40 | 27
Precip: 0.12
24 Scattered Clouds
Actual: 39 | 28
Precip: 0.00
Average: 39 | 26
Precip: 0.12
25 Rain
Actual: 44 | 35
Precip: 0.13
Average: 39 | 26
Precip: 0.12
26 Rain
Actual: 39 | 30
Precip: 0.22
Average: 39 | 26
Precip: 0.12
27 Snow
Actual: 52 | 33
Precip: 0.82
Average: 39 | 26
Precip: 0.12
28 Snow
Actual: 37 | 28
Precip: 0.00
Average: 39 | 26
Precip: 0.12
29 Snow
Actual: 42 | 26
Precip: 1.21
Average: 39 | 26
Precip: 0.12
30 Snow
Actual: 33 | 25
Precip: 0.38
Average: 39 | 26
Precip: 0.12
31 Scattered Clouds
Actual: 35 | 21
Precip: 0.00
Average: 38 | 25
Precip: 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 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  
Comma Delimited File