Annapolis, MD

9:25 AM EST on December 07, 2016 (GMT -0500)
Annapolis Naval Academy

Weather History for KNAK - September, 2012

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 91 °F 79 °F 69 °F
Mean Temperature 84 °F 72 °F 62 °F
Min Temperature 80 °F 65 °F 54 °F
Degree Days  
Heating Degree Days (base 65) 4 0 0 7
Cooling Degree Days (base 65) 20 7 0 220
Growing Degree Days (base 50) 34 22 12 658
Dew Point  
Dew Point 76 °F 61 °F 39 °F
Precipitation  
Precipitation 0.95 in 0.10 in 0.00 in 3.14 in
Snowdepth - - - -
Wind  
Wind 30 mph 6 mph 0 mph
Gust Wind 40 mph 22 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.39 in 30.04 in 29.60 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 10, 2012 Rise Set
Actual Time 6:43 AM EDT 7:21 PM EDT
Civil Twilight 6:16 AM EDT 7:48 PM EDT
Nautical Twilight 5:44 AM EDT 8:20 PM EDT
Astronomical Twilight 5:11 AM EDT 8:52 PM EDT
Moon 1:04 AM EDT (9/10) 3:47 PM EDT (9/10)
Length of Visible Light 13h 32m
Length of Day
12h 38m
Waning Crescent, 30% of the Moon is Illuminated
Sep 10
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Daily Weather History & Observations

2012 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 91 84 78 76 72 67 85 71 53 30.06 30.02 29.99 10 8 2 8 3 17 0.26 Rain
2 82 78 75 75 73 71 90 79 70 30.04 30.01 29.96 10 8 4 8 4 - 0.00 Rain
3 84 80 77 76 74 72 88 83 74 30.07 30.03 30.01 10 7 1 22 8 33 0.76 Rain
4 89 83 78 76 74 70 87 76 65 30.03 29.96 29.87 10 9 7 14 6 22 0.00  
5 88 83 80 76 73 71 79 72 63 29.86 29.83 29.79 10 10 7 9 6 - 0.01  
6 82 77 73 75 73 69 85 82 74 29.94 29.88 29.83 10 9 3 16 4 - 0.08 Rain
7 87 79 72 74 70 67 84 73 57 29.95 29.91 29.84 10 10 9 14 5 21 0.00  
8 89 78 68 73 69 63 88 80 55 29.87 29.75 29.60 10 7 0 30 7 40 0.72 Fog , Rain
9 80 72 64 62 57 53 80 60 39 29.95 29.87 29.82 10 10 10 12 7 - 0.00  
10 75 70 63 56 53 47 75 56 36 30.17 30.06 29.96 10 10 9 15 10 22 0.00  
11 75 66 57 56 52 46 87 59 36 30.32 30.27 30.18 10 10 10 10 4 - 0.00  
12 77 68 60 60 55 52 80 64 42 30.38 30.34 30.30 10 10 9 12 3 - 0.00  
13 79 70 62 62 58 46 87 68 31 30.39 30.34 30.28 10 10 10 10 2 - 0.00  
14 79 70 62 69 63 58 87 75 64 30.29 30.21 30.13 10 10 10 14 3 - 0.00  
15 79 70 63 63 54 51 81 56 40 30.22 30.16 30.12 10 10 10 17 11 24 0.00  
16 77 68 60 60 54 51 79 63 42 30.17 30.13 30.07 10 10 10 7 3 - 0.00  
17 75 67 59 68 61 54 84 73 64 30.13 30.07 29.99 10 10 8 14 4 - 0.01 Rain
18 82 76 70 70 68 65 87 81 67 29.96 29.76 29.64 10 8 1 24 11 37 0.95 Rain
19 72 66 61 63 53 46 81 61 41 30.17 30.04 29.82 10 10 8 15 9 21 0.01 Rain
20 72 66 60 60 55 50 83 66 47 30.19 30.13 30.08 10 10 10 14 5 - 0.00  
21 75 68 61 65 59 55 87 71 57 30.09 30.04 29.97 10 10 10 14 4 - 0.00  
22 81 75 69 67 63 57 87 73 54 29.97 29.89 29.79 10 10 10 13 10 21 0.00  
23 71 64 55 54 47 43 77 55 42 30.16 30.09 29.92 10 10 10 14 8 24 0.00  
24 69 62 54 51 45 39 75 57 33 30.22 30.17 30.15 10 10 10 10 5 20 0.00  
25 75 68 62 58 53 49 62 53 44 30.22 30.15 30.09 10 10 10 15 10 18 0.00  
26 84 74 64 67 61 54 76 65 43 30.14 30.10 30.06 10 10 9 10 6 - 0.01 Rain
27 79 73 68 67 64 62 84 73 60 30.18 30.13 30.08 10 10 10 10 4 - 0.02 Rain
28 80 73 66 67 63 56 90 71 54 30.11 30.02 29.97 10 8 3 7 3 - 0.26 Rain
29 71 66 61 54 52 50 72 63 49 30.02 29.97 29.92 10 10 10 12 6 17 0.00  
30 73 64 54 54 50 46 87 65 40 29.91 29.87 29.81 10 10 10 17 5 - 0.05 Rain