Boston, MA

5:55 PM EDT on June 26, 2017 (GMT -0400)
Logan International

Weather History for KBOS - September, 2011

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Month of September, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 87 °F 74 °F 62 °F
Mean Temperature 78 °F 67 °F 55 °F
Min Temperature 69 °F 60 °F 48 °F
Degree Days  
Heating Degree Days (base 65) 10 1 0 44
Cooling Degree Days (base 65) 13 4 0 118
Growing Degree Days (base 50) 28 17 5 504
Dew Point  
Dew Point 72 °F 59 °F 33 °F
Precipitation  
Precipitation 1.17 in 0.15 in 0.00 in 4.40 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 36 mph 9 mph 0 mph
Gust Wind 44 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.49 in 30.04 in 29.59 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 09, 2011 Rise Set
Actual Time 6:17 AM EDT 7:04 PM EDT
Civil Twilight 5:48 AM EDT 7:33 PM EDT
Nautical Twilight 5:15 AM EDT 8:06 PM EDT
Astronomical Twilight 4:39 AM EDT 8:41 PM EDT
Moon 5:30 PM EDT (9/9) 3:31 AM EDT (9/9)
Length of Visible Light 13h 44m
Length of Day
12h 47m
Waxing Gibbous, 93% of the Moon is Illuminated
Sep 9
Waxing Gibbous
Sep 12
Full
Sep 20
Last Quarter
Sep 27
New
Oct 3
First Quarter

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 71 67 62 60 58 54 90 72 53 30.24 30.20 30.16 10 10 9 14 7 16 0.00  
2 68 64 60 59 57 56 90 82 73 30.17 30.12 30.05 10 10 9 13 7 15 0.00  
3 86 73 60 68 63 56 90 73 55 30.03 29.92 29.85 10 10 6 17 10 23 0.00  
4 85 77 68 72 67 63 84 73 61 29.91 29.86 29.81 10 9 5 21 12 25 0.00  
5 87 78 69 69 66 60 87 69 51 29.84 29.82 29.79 10 10 9 23 14 30 0.00  
6 74 67 60 69 59 55 90 79 68 30.22 30.01 29.84 10 8 2 25 9 30 0.68 Rain
7 63 62 60 61 59 57 97 94 90 30.25 30.21 30.12 10 4 1 20 13 25 0.30 Rain
8 64 61 58 61 58 55 100 92 84 30.16 30.08 29.95 10 5 1 16 6 21 1.17 Rain
9 81 70 58 62 58 53 100 70 39 29.95 29.83 29.73 10 7 0 16 8 21 0.00 Fog
10 71 65 59 57 54 50 72 66 60 30.10 29.95 29.83 10 10 9 15 8 18 0.00  
11 70 63 56 57 53 50 86 71 55 30.18 30.10 30.02 10 10 10 18 8 21 0.00  
12 82 72 62 65 60 53 90 71 51 30.01 29.96 29.91 10 10 10 16 10 25 0.00  
13 85 75 64 64 62 59 87 66 44 29.94 29.89 29.82 10 9 4 22 10 32 0.00  
14 86 77 68 70 66 63 90 69 48 29.96 29.89 29.86 10 9 2 24 9 29 0.08 Rain , Thunderstorm
15 83 69 55 68 61 42 90 76 62 29.96 29.88 29.80 10 8 5 21 10 29 0.03 Rain
16 65 58 50 40 37 33 63 47 31 30.35 30.19 29.98 10 10 9 21 12 29 0.00  
17 62 55 48 46 41 37 67 55 42 30.48 30.44 30.36 10 10 10 13 7 16 0.00  
18 66 59 51 50 46 43 77 63 48 30.49 30.44 30.37 10 10 10 16 9 20 0.00  
19 65 58 51 52 49 46 86 69 52 30.36 30.27 30.17 10 10 10 14 9 18 0.00  
20 67 61 55 61 57 51 90 84 78 30.16 30.11 30.07 10 9 4 14 9 18 0.13 Rain
21 75 67 59 62 59 55 93 79 64 30.25 30.21 30.16 10 8 0 16 7 24 0.00 Fog
22 73 69 65 70 66 63 93 89 84 30.21 30.13 30.08 10 8 2 12 5 16 0.05 Rain
23 73 69 65 67 65 64 100 90 79 30.16 30.11 30.04 10 4 0 10 6 14 0.47 Fog , Rain
24 80 73 65 70 68 64 100 86 71 30.07 30.00 29.96 10 7 0 13 7 18 0.43 Rain
25 78 73 68 70 67 65 93 84 74 30.09 30.05 30.02 10 10 10 10 4 12 0.00  
26 76 71 66 67 62 59 90 76 61 30.02 29.98 29.94 10 10 10 10 5 13 0.00  
27 73 69 64 63 62 60 93 81 68 30.07 30.01 29.94 10 9 5 15 6 17 0.00  
28 70 67 63 63 61 58 93 83 73 30.11 30.06 29.99 10 10 9 18 11 22 0.00  
29 72 67 62 67 63 60 100 91 81 29.97 29.75 29.59 10 5 0 36 10 44 0.94 Fog , Rain , Thunderstorm
30 77 68 58 63 57 53 93 72 50 29.74 29.69 29.64 10 10 8 20 11 25 0.12