Weather History for Portsmouth, NH

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Month of September, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 86 °F 73 °F 60 °F
Mean Temperature 77 °F 64 °F 51 °F
Min Temperature 70 °F 56 °F 39 °F
Degree Days  
Heating Degree Days (base 65) 14 3 0 89
Cooling Degree Days (base 65) 12 2 0 67
Growing Degree Days (base 50) 27 14 1 429
Dew Point  
Dew Point 73 °F 58 °F 34 °F
Precipitation  
Precipitation 1.63 in 0.12 in 0.00 in 3.74 in
Snowdepth - - - -
Wind  
Wind 20 mph 5 mph 0 mph
Gust Wind 30 mph 21 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.51 in 30.04 in 29.56 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 05, 2011 Rise Set
Actual Time 6:11 AM EDT 7:11 PM EDT
Civil Twilight 5:42 AM EDT 7:40 PM EDT
Nautical Twilight 5:07 AM EDT 8:15 PM EDT
Astronomical Twilight 4:31 AM EDT 8:51 PM EDT
Moon 3:01 PM EDT (9/5) No Moon Set
Length of Visible Light 13h 57m
Length of Day
13h 00m
First Quarter, 60% of the Moon is Illuminated
Sep 5
First Quarter
Sep 12
Full
Sep 20
Last Quarter
Sep 27
New
Oct 3
First Quarter

Weather History Calendar

Precipitation Actual month total 3.74 Average Month Total: 3.43
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
72 | 57 0.00
Average:
75 | 55 0.08
Partly Cloudy
Actual:
70 | 56 0.00
Average:
75 | 55 0.09
Scattered Clouds
Actual:
84 | 55 0.00
Average:
74 | 55 0.09
Partly Cloudy
Actual:
85 | 67 0.00
Average:
74 | 55 0.09
Mostly Cloudy
Actual:
86 | 70 0.00
Average:
74 | 55 0.10
Rain
Actual:
69 | 59 0.22
Average:
74 | 54 0.10
Rain
Actual:
60 | 57 1.63
Average:
73 | 54 0.11
Rain
Actual:
67 | 57 0.12
Average:
73 | 54 0.11
Fog
Actual:
80 | 57 0.00
Average:
73 | 54 0.11
Partly Cloudy
Actual:
69 | 54 0.00
Average:
72 | 54 0.12
Scattered Clouds
Actual:
68 | 50 0.00
Average:
72 | 53 0.12
Scattered Clouds
Actual:
81 | 56 0.00
Average:
71 | 53 0.12
Clear
Actual:
82 | 59 0.00
Average:
71 | 53 0.12
Partly Cloudy
Actual:
82 | 66 0.00
Average:
71 | 53 0.13
Rain
Actual:
74 | 51 0.02
Average:
71 | 52 0.13
Scattered Clouds
Actual:
62 | 44 0.00
Average:
70 | 52 0.13
Partly Cloudy
Actual:
64 | 39 0.00
Average:
70 | 52 0.13
Partly Cloudy
Actual:
65 | 46 0.00
Average:
70 | 51 0.13
Scattered Clouds
Actual:
64 | 43 0.00
Average:
69 | 51 0.13
Rain
Actual:
65 | 48 0.08
Average:
69 | 50 0.12
Fog
Actual:
74 | 51 0.00
Average:
68 | 50 0.12
Rain
Actual:
68 | 61 0.47
Average:
68 | 49 0.12
Rain
Actual:
68 | 64 0.47
Average:
67 | 49 0.12
Rain
Actual:
78 | 64 0.28
Average:
67 | 48 0.12
Fog
Actual:
81 | 65 0.00
Average:
66 | 47 0.12
Partly Cloudy
Actual:
81 | 60 0.00
Average:
66 | 47 0.11
Partly Cloudy
Actual:
73 | 57 0.00
Average:
65 | 46 0.11
Partly Cloudy
Actual:
69 | 58 0.00
Average:
65 | 45 0.11
Thunderstorm
Actual:
66 | 61 0.45
Average:
64 | 45 0.12
Partly Cloudy
Actual:
75 | 56 0.00
Average:
64 | 44 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

2011 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 72 64 57 59 56 52 94 75 51 30.25 30.22 30.18 10 10 10 10 3 - 0.00  
2 70 64 56 59 56 53 94 80 58 30.18 30.13 30.03 10 9 4 10 4 - 0.00  
3 84 70 55 71 63 54 96 81 59 30.02 29.90 29.84 10 10 7 9 4 - 0.00  
4 85 76 67 73 70 67 100 84 67 29.89 29.85 29.79 10 6 2 10 4 - 0.00  
5 86 77 70 68 67 64 88 73 56 29.85 29.80 29.76 10 9 8 16 9 21 0.00  
6 69 64 59 59 58 56 95 84 63 30.23 30.03 29.87 10 9 4 14 8 21 0.22 Rain
7 60 58 57 59 58 56 100 96 93 30.30 30.24 30.14 10 3 1 16 7 22 1.63 Rain
8 67 62 57 61 57 55 100 92 78 30.15 30.09 29.96 10 8 3 9 6 - 0.12 Rain
9 80 68 57 67 59 54 100 86 44 29.96 29.83 29.71 10 4 0 12 4 - 0.00 Fog
10 69 62 54 57 53 50 93 75 58 30.11 29.95 29.81 10 10 10 12 5 - 0.00  
11 68 58 50 54 52 50 99 78 55 30.18 30.10 30.00 10 10 7 14 4 17 0.00  
12 81 68 56 62 59 53 92 73 51 29.99 29.94 29.90 10 10 10 10 6 - 0.00  
13 82 70 59 65 62 59 99 76 49 29.93 29.87 29.80 10 9 7 10 3 18 0.00  
14 82 74 66 67 65 62 98 76 59 29.95 29.88 29.82 10 9 5 10 7 - 0.00  
15 74 61 51 68 60 42 100 90 62 29.94 29.88 29.82 10 5 1 18 4 30 0.02 Rain
16 62 54 44 42 38 34 77 57 36 30.34 30.16 29.96 10 10 10 20 11 30 0.00  
17 64 51 39 46 39 36 91 66 38 30.48 30.44 30.36 10 10 10 12 3 - 0.00  
18 65 56 46 50 46 39 88 72 39 30.51 30.46 30.39 10 10 10 13 6 18 0.00  
19 64 54 43 49 44 40 95 73 42 30.38 30.27 30.16 10 10 10 12 6 - 0.00  
20 65 56 48 60 55 47 97 91 81 30.15 30.09 30.04 10 10 6 10 4 - 0.08 Rain
21 74 62 51 60 57 52 100 89 62 30.25 30.21 30.16 10 7 0 12 3 - 0.00 Fog
22 68 64 61 68 64 61 100 99 94 30.21 30.14 30.09 7 1 0 6 2 - 0.47 Fog , Rain
23 68 66 64 68 65 64 100 100 99 30.16 30.12 30.06 7 1 0 6 2 - 0.47 Fog , Rain
24 78 70 64 71 67 64 100 96 76 30.06 30.02 29.97 10 4 0 8 4 - 0.28 Fog , Rain
25 81 73 65 72 67 65 100 93 61 30.10 30.05 30.01 10 5 0 6 2 - 0.00 Fog
26 81 70 60 64 61 58 99 78 47 30.03 29.97 29.92 10 10 8 8 3 - 0.00  
27 73 65 57 62 59 56 99 83 57 30.09 30.02 29.95 10 10 8 12 4 - 0.00  
28 69 63 58 60 59 56 99 86 70 30.14 30.09 30.04 10 10 7 13 7 - 0.00  
29 66 64 61 66 63 58 100 96 87 30.00 29.74 29.56 10 5 0 17 8 24 0.45 Fog , Rain , Thunderstorm
30 75 65 56 61 58 55 97 81 53 29.72 29.68 29.60 10 10 6 13 9 - 0.00