Weather History for Portsmouth, NH

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 63 °F 43 °F 25 °F
Mean Temperature 56 °F 35 °F 20 °F
Min Temperature 50 °F 26 °F 10 °F
Degree Days  
Heating Degree Days (base 65) 45 30 8 933
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 6 0 0 6
Dew Point  
Dew Point 58 °F 25 °F -9 °F
Precipitation  
Precipitation 1.06 in 0.11 in 0.00 in 3.40 in
Snowdepth - - - -
Wind  
Wind 31 mph 7 mph 0 mph
Gust Wind 43 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.68 in 30.10 in 29.21 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 20, 2011 Rise Set
Actual Time 7:10 AM EST 4:10 PM EST
Civil Twilight 6:38 AM EST 4:43 PM EST
Nautical Twilight 6:02 AM EST 5:19 PM EST
Astronomical Twilight 5:27 AM EST 5:53 PM EST
Moon 2:24 AM EST (12/20) 12:47 PM EST (12/20)
Length of Visible Light 10h 04m
Length of Day
8h 59m
Waning Crescent, 21% of the Moon is Illuminated
Dec 20
Waning Crescent
Dec 24
New
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter

Weather History Calendar

Precipitation Actual month total 3.40 Average Month Total: 4.19
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Scattered Clouds
Actual:
48 | 30 0.00
Average:
42 | 27 0.09
Partly Cloudy
Actual:
48 | 26 0.00
Average:
41 | 26 0.09
Scattered Clouds
Actual:
41 | 28 0.00
Average:
41 | 26 0.09
Partly Cloudy
Actual:
50 | 25 0.00
Average:
40 | 26 0.09
Fog
Actual:
57 | 37 0.00
Average:
40 | 25 0.09
Rain
Actual:
63 | 50 0.08
Average:
40 | 25 0.10
Rain
Actual:
55 | 39 1.06
Average:
39 | 25 0.10
Rain
Actual:
43 | 32 0.75
Average:
39 | 25 0.11
Rain
Actual:
48 | 32 0.00
Average:
39 | 25 0.11
Partly Cloudy
Actual:
44 | 26 0.00
Average:
39 | 24 0.12
Clear
Actual:
36 | 23 0.00
Average:
39 | 24 0.13
Partly Cloudy
Actual:
47 | 24 0.00
Average:
39 | 24 0.13
Partly Cloudy
Actual:
46 | 21 0.00
Average:
38 | 24 0.14
Mostly Cloudy
Actual:
40 | 31 0.00
Average:
38 | 23 0.15
Rain
Actual:
51 | 34 0.04
Average:
38 | 23 0.15
Rain
Actual:
50 | 36 0.01
Average:
38 | 23 0.16
Partly Cloudy
Actual:
39 | 23 0.00
Average:
37 | 22 0.16
Scattered Clouds
Actual:
25 | 14 0.00
Average:
37 | 22 0.16
Partly Cloudy
Actual:
41 | 10 0.00
Average:
37 | 22 0.16
Partly Cloudy
Actual:
41 | 21 0.00
Average:
36 | 21 0.16
Snow
Actual:
37 | 20 0.07
Average:
36 | 21 0.16
Rain
Actual:
53 | 37 0.22
Average:
36 | 21 0.16
Snow
Actual:
41 | 27 0.71
Average:
35 | 20 0.16
Snow
Actual:
28 | 18 0.00
Average:
35 | 20 0.16
Snow
Actual:
32 | 13 0.02
Average:
35 | 20 0.16
Snow
Actual:
38 | 24 0.00
Average:
35 | 20 0.16
Rain
Actual:
50 | 23 0.34
Average:
34 | 20 0.15
Rain
Actual:
51 | 25 0.02
Average:
34 | 19 0.15
Scattered Clouds
Actual:
30 | 19 0.00
Average:
34 | 19 0.15
Snow
Actual:
33 | 23 0.00
Average:
34 | 19 0.15
Rain
Actual:
35 | 29 0.08
Average:
33 | 19 0.14
 

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

2011 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 48 40 30 32 25 18 74 58 39 30.28 30.09 29.83 10 10 10 12 7 - 0.00  
2 48 37 26 30 26 22 86 64 40 30.44 30.31 30.25 10 10 10 12 3 - 0.00  
3 41 34 28 27 25 23 93 71 47 30.68 30.62 30.48 10 10 10 7 4 - 0.00  
4 50 38 25 40 33 24 98 83 61 30.62 30.49 30.37 10 10 5 12 3 23 0.00  
5 57 47 37 50 43 37 100 92 65 30.35 30.30 30.19 10 6 0 8 5 - 0.00 Fog
6 63 56 50 58 54 48 100 90 71 30.17 30.00 29.89 10 8 2 13 5 17 0.08 Rain
7 55 47 39 56 44 39 100 99 94 29.91 29.79 29.48 8 5 0 13 5 22 1.06 Fog , Rain
8 43 38 32 39 29 19 100 73 45 30.25 29.74 29.30 10 8 2 31 14 40 0.75 Rain
9 48 40 32 36 28 24 95 67 49 30.34 30.26 30.19 10 10 5 12 7 - 0.00 Rain
10 44 35 26 35 24 13 98 70 44 30.42 30.24 30.14 10 10 7 17 6 23 0.00  
11 36 30 23 20 15 12 77 58 38 30.61 30.55 30.43 10 10 10 9 5 - 0.00  
12 47 36 24 18 14 10 69 45 26 30.54 30.47 30.38 10 10 10 8 5 - 0.00  
13 46 34 21 26 20 13 82 61 37 30.36 30.32 30.29 10 10 10 7 3 - 0.00  
14 40 36 31 29 28 26 85 70 59 30.43 30.39 30.34 10 10 10 8 5 - 0.00  
15 51 42 34 47 39 30 93 82 69 30.31 29.94 29.64 10 9 6 15 9 22 0.04 Rain
16 50 43 36 47 32 24 90 61 42 30.05 29.82 29.59 10 10 7 24 12 39 0.01 Rain
17 39 32 23 29 17 3 87 59 35 30.17 30.07 30.01 10 10 10 15 7 18 0.00  
18 25 20 14 6 2 -6 65 47 25 30.29 30.24 30.17 10 10 10 14 9 17 0.00  
19 41 26 10 27 15 4 81 59 43 30.25 30.01 29.79 10 10 10 14 5 22 0.00  
20 41 31 21 31 14 5 70 49 29 30.22 30.09 29.81 10 10 10 16 10 29 0.00  
21 37 28 20 37 30 15 100 90 74 30.20 29.90 29.61 10 5 0 6 2 - 0.07 Fog , Rain , Snow
22 53 45 37 46 38 34 100 82 48 30.07 29.84 29.59 10 7 0 14 5 20 0.22 Fog , Rain
23 41 34 27 39 32 14 100 88 58 30.17 29.98 29.89 10 7 2 16 6 28 0.71 Rain , Snow
24 28 24 18 14 8 0 69 53 33 30.51 30.40 30.19 10 10 10 12 8 - 0.00 Snow
25 32 22 13 27 15 5 93 73 62 30.50 30.23 29.87 10 9 2 8 5 - 0.02 Rain , Snow
26 38 31 24 28 22 17 93 72 47 30.23 30.04 29.83 10 10 8 17 6 26 0.00 Snow
27 50 36 23 49 32 17 97 78 59 30.16 29.87 29.36 10 8 3 30 8 43 0.34 Rain
28 51 38 25 52 35 9 100 75 50 29.56 29.31 29.21 10 8 0 26 15 39 0.02 Fog , Rain
29 30 24 19 10 -2 -9 53 33 18 30.02 29.84 29.58 10 10 10 23 15 36 0.00  
30 33 28 23 22 17 9 70 60 50 30.12 30.09 30.03 10 10 10 9 4 - 0.00 Snow
31 35 32 29 36 31 23 100 95 72 30.08 29.92 29.81 10 3 0 9 5 - 0.08 Fog , Rain