Weather History for Portsmouth, NH

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 58 °F 40 °F 24 °F
Mean Temperature 45 °F 34 °F 22 °F
Min Temperature 38 °F 27 °F 17 °F
Degree Days  
Heating Degree Days (base 65) 43 31 20 971
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 54 °F 27 °F 3 °F
Precipitation  
Precipitation 2.29 in 0.19 in 0.00 in 5.86 in
Snowdepth 4.0 in 1.9 in 1.0 in -
Wind  
Wind 36 mph 8 mph 0 mph
Gust Wind 58 mph 24 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.67 in 29.98 in 29.09 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 19, 2012 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 11:08 AM EST (12/19) 11:46 PM EST (12/19)
Length of Visible Light 10h 04m
Length of Day
8h 59m
Waxing Crescent, 45% of the Moon is Illuminated
Dec 19
Waxing Crescent
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Weather History Calendar

Precipitation Actual month total 5.86 Average Month Total: 4.19
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Snow
Actual:
26 | 22 0.06
Average:
42 | 27 0.09
Rain
Actual:
47 | 26 0.07
Average:
41 | 26 0.09
Partly Cloudy
Actual:
56 | 31 0.00
Average:
41 | 26 0.09
Mostly Cloudy
Actual:
57 | 30 0.00
Average:
40 | 26 0.09
Rain
Actual:
58 | 30 0.01
Average:
40 | 25 0.09
Partly Cloudy
Actual:
41 | 23 0.00
Average:
40 | 25 0.10
Rain
Actual:
42 | 23 0.02
Average:
39 | 25 0.10
Rain
Actual:
41 | 37 0.15
Average:
39 | 25 0.11
Rain
Actual:
46 | 34 0.00
Average:
39 | 25 0.11
Rain
Actual:
46 | 38 0.37
Average:
39 | 24 0.12
Rain
Actual:
43 | 30 0.01
Average:
39 | 24 0.13
Partly Cloudy
Actual:
38 | 23 0.00
Average:
39 | 24 0.13
Scattered Clouds
Actual:
43 | 23 0.00
Average:
38 | 24 0.14
Partly Cloudy
Actual:
46 | 24 0.00
Average:
38 | 23 0.15
Scattered Clouds
Actual:
40 | 24 0.00
Average:
38 | 23 0.15
Snow
Actual:
24 | 22 0.11
Average:
38 | 23 0.16
Snow
Actual:
33 | 23 0.21
Average:
37 | 22 0.16
Rain
Actual:
49 | 33 1.41
Average:
37 | 22 0.16
Rain
Actual:
41 | 35 0.09
Average:
37 | 22 0.16
Rain
Actual:
39 | 29 0.00
Average:
36 | 21 0.16
Rain
Actual:
51 | 36 0.80
Average:
36 | 21 0.16
Partly Cloudy
Actual:
39 | 26 0.00
Average:
36 | 21 0.16
Partly Cloudy
Actual:
38 | 25 0.00
Average:
35 | 20 0.16
Partly Cloudy
Actual:
38 | 26 0.00
Average:
35 | 20 0.16
Snow
Actual:
32 | 23 0.00
Average:
35 | 20 0.16
Snow
Actual:
36 | 17 0.06
Average:
35 | 20 0.16
Snow
Actual:
40 | 28 2.29
Average:
34 | 20 0.15
Partly Cloudy
Actual:
34 | 25 0.00
Average:
34 | 19 0.15
Snow
Actual:
30 | 24 0.18
Average:
34 | 19 0.15
Snow
Actual:
26 | 18 0.02
Average:
34 | 19 0.15
Partly Cloudy
Actual:
33 | 19 0.00
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

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 26 24 22 24 17 3 93 72 37 30.67 30.60 30.52 10 5 1 9 7 - 0.06 Snow
2 47 36 26 47 33 24 100 96 89 30.51 30.29 30.00 8 3 0 10 4 - 0.07 Fog , Rain
3 56 45 31 45 39 31 99 79 47 30.31 30.13 29.99 10 10 4 22 9 28 0.00  
4 57 43 30 53 38 30 100 89 81 30.32 30.20 29.94 10 9 4 13 2 17 0.00  
5 58 44 30 54 36 14 89 65 45 30.10 29.91 29.80 10 10 6 22 11 31 0.01 Rain
6 41 32 23 20 17 14 87 57 35 30.31 30.26 30.13 10 10 10 10 7 - 0.00  
7 42 32 23 39 28 19 96 81 61 30.29 30.17 30.04 10 9 4 7 2 - 0.02 Rain
8 41 39 37 40 38 37 100 99 93 30.04 29.96 29.86 3 1 0 9 2 - 0.15 Fog , Rain
9 46 40 34 41 34 27 100 81 45 30.31 30.16 29.93 10 8 1 12 6 - 0.00 Rain
10 46 42 38 46 41 38 100 98 85 30.16 29.73 29.50 8 2 0 15 8 22 0.37 Fog , Rain
11 43 37 30 43 33 20 100 81 53 30.13 29.83 29.53 10 10 4 15 6 20 0.01 Rain
12 38 32 23 23 20 19 87 67 47 30.42 30.32 30.15 10 10 10 7 4 - 0.00  
13 43 33 23 26 23 20 93 73 41 30.45 30.38 30.27 10 10 10 7 4 - 0.00  
14 46 35 24 26 23 19 89 66 34 30.25 30.14 30.03 10 10 10 13 5 18 0.00  
15 40 32 24 26 17 9 72 53 36 30.37 30.29 30.16 10 10 10 12 7 - 0.00  
16 24 23 22 20 16 8 89 74 53 30.37 30.26 30.15 10 6 1 10 8 - 0.11 Snow
17 33 28 23 33 27 21 99 93 88 30.14 30.01 29.88 3 2 1 13 8 - 0.21 Rain , Snow
18 49 41 33 49 43 34 100 99 93 29.83 29.49 29.37 6 2 0 17 11 24 1.41 Fog , Rain
19 41 38 35 39 36 33 100 89 71 30.03 29.66 29.41 10 8 4 18 11 28 0.09 Rain
20 39 34 29 34 31 27 99 84 62 30.21 30.12 30.04 10 10 7 7 4 - 0.00 Rain
21 51 44 36 52 41 32 100 87 68 30.04 29.44 29.09 10 6 1 36 14 58 0.80 Rain
22 39 33 26 32 21 12 80 62 45 29.59 29.35 29.19 10 10 10 23 12 33 0.00  
23 38 32 25 21 15 10 69 54 37 29.82 29.76 29.61 10 10 10 17 12 26 0.00  
24 38 32 26 21 16 12 71 54 34 30.06 29.99 29.83 10 10 10 13 7 18 0.00  
25 32 28 23 27 21 14 89 75 62 30.22 30.08 30.01 10 9 7 10 5 - 0.00 Snow
26 36 26 17 32 20 11 89 71 49 30.32 30.22 29.99 10 9 2 16 5 30 0.06 Rain , Snow
27 40 34 28 39 31 25 100 91 81 29.95 29.53 29.35 10 4 1 24 18 45 2.29 Rain , Snow
28 34 30 25 25 21 18 82 69 59 29.99 29.85 29.61 10 10 10 17 11 25 0.00  
29 30 27 24 29 23 18 95 83 69 29.98 29.75 29.43 10 5 0 18 7 25 0.18 Fog , Snow
30 26 22 18 23 15 4 93 70 50 29.90 29.60 29.42 10 9 1 25 16 40 0.02 Snow
31 33 26 19 22 15 5 71 61 52 29.97 29.88 29.73 10 10 10 24 13 41 0.00