Seattle, WA

2:21 PM PST on February 08, 2016 (GMT -0800)
Boeing Field-King County International

Weather History for KBFI - September, 2011

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Month of September, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 82 °F 73 °F 63 °F
Mean Temperature 72 °F 64 °F 56 °F
Min Temperature 64 °F 55 °F 46 °F
Degree Days  
Heating Degree Days (base 65) 9 3 0 76
Cooling Degree Days (base 65) 7 1 0 44
Growing Degree Days (base 50) 22 14 6 413
Dew Point  
Dew Point 63 °F 52 °F 37 °F
Precipitation  
Precipitation 0.32 in 0.03 in 0.00 in 1.01 in
Snowdepth - - - -
Wind  
Wind 20 mph 4 mph 0 mph
Gust Wind 26 mph 19 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.40 in 30.02 in 29.61 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 22, 2011 Rise Set
Actual Time 6:55 AM PDT 7:07 PM PDT
Civil Twilight 6:25 AM PDT 7:37 PM PDT
Nautical Twilight 5:48 AM PDT 8:14 PM PDT
Astronomical Twilight 5:11 AM PDT 8:51 PM PDT
Moon 1:00 AM PDT (9/22) 4:21 PM PDT (9/22)
Length of Visible Light 13h 12m
Length of Day
12h 11m
Waning Crescent, 27% of the Moon is Illuminated
Sep 22
Waning Crescent
Sep 27
New
Oct 3
First Quarter
Oct 11
Full
Oct 19
Last 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 73 62 51 52 50 47 94 68 39 30.20 30.15 30.11 10 10 10 8 4 18 0.00  
2 70 64 57 52 49 43 82 61 40 30.25 30.21 30.14 10 10 10 10 3 18 0.00  
3 77 65 55 52 50 46 83 59 38 30.20 30.09 29.95 10 10 10 10 3 - 0.00  
4 82 66 51 52 47 37 90 54 19 29.94 29.90 29.84 10 10 10 6 1 - 0.00  
5 80 66 53 53 49 46 86 56 32 30.04 29.95 29.89 10 10 10 7 3 - 0.00  
6 81 68 55 54 52 45 87 61 28 30.14 30.11 30.06 10 10 10 8 2 - 0.00  
7 79 66 55 54 52 48 90 59 37 30.14 30.08 30.00 10 10 10 10 3 17 0.00  
8 82 70 60 55 52 51 75 56 36 30.18 30.13 30.07 10 10 10 8 1 - 0.00  
9 82 70 59 57 54 52 81 60 35 30.22 30.14 30.05 10 10 10 10 2 - 0.00  
10 80 68 57 59 56 54 87 64 40 30.06 29.96 29.87 10 10 10 10 3 - 0.00  
11 82 71 60 58 56 53 83 61 37 29.92 29.86 29.81 10 10 10 9 2 - 0.00  
12 70 63 57 56 55 54 94 79 63 30.12 30.06 29.95 10 10 10 9 6 - 0.00  
13 66 62 59 55 54 52 87 74 63 30.16 30.13 30.09 10 10 10 7 4 - 0.00  
14 66 63 60 55 53 50 80 69 57 30.08 30.02 29.94 10 10 2 6 2 - 0.00  
15 66 60 57 54 52 50 83 72 59 29.99 29.95 29.93 10 10 10 10 5 25 0.00  
16 66 59 54 49 45 41 80 63 43 30.03 30.01 30.00 10 10 10 9 5 - 0.00  
17 63 58 52 54 49 45 93 78 62 30.07 30.04 30.02 10 9 2 14 9 20 0.21 Rain
18 68 60 53 59 56 51 100 90 70 30.13 30.08 30.03 10 9 2 13 8 20 0.13 Rain
19 69 62 55 56 50 43 96 70 40 30.24 30.18 30.12 10 9 2 9 3 - 0.06 Rain
20 77 62 50 52 49 46 94 69 35 30.16 30.09 30.01 10 10 10 5 1 - 0.00  
21 75 68 60 55 52 48 80 60 38 30.01 29.98 29.93 10 10 10 9 6 17 0.00  
22 75 68 62 63 58 51 88 71 58 30.00 29.97 29.93 10 10 10 12 7 - 0.00  
23 81 72 64 63 62 60 94 75 52 30.03 29.97 29.86 10 10 10 13 5 18 0.00  
24 78 68 60 61 59 57 93 74 54 29.91 29.75 29.61 10 10 10 10 6 - 0.00  
25 66 60 55 57 51 47 90 70 52 29.97 29.81 29.62 10 10 6 20 9 26 0.22 Rain
26 63 58 53 57 53 49 94 85 72 29.95 29.88 29.82 10 9 4 18 7 22 0.32 Rain
27 66 60 53 55 51 46 94 74 48 30.30 30.09 29.95 10 10 4 14 7 24 0.04 Rain
28 64 56 48 51 47 46 93 73 52 30.40 30.28 30.09 10 10 10 12 3 20 0.01  
29 75 60 46 51 47 39 97 65 27 30.07 29.92 29.79 10 10 10 7 1 - 0.00  
30 64 58 53 55 49 47 83 73 63 29.94 29.89 29.85 10 10 10 12 5 18 0.02