Weather History for Seattle, WA

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 90 °F 73 °F 61 °F
Mean Temperature 73 °F 63 °F 58 °F
Min Temperature 58 °F 52 °F 46 °F
Degree Days  
Heating Degree Days (base 65) 7 3 0 89
Cooling Degree Days (base 65) 8 1 0 28
Growing Degree Days (base 50) 22 13 6 380
Dew Point  
Dew Point 55 °F 49 °F 37 °F
Precipitation  
Precipitation 0.01 in 0.00 in 0.00 in 0.03 in
Snowdepth - - - -
Wind  
Wind 21 mph 6 mph 0 mph
Gust Wind 24 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.43 in 30.14 in 29.95 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 03, 2012 Rise Set
Actual Time 6:31 AM PDT 7:44 PM PDT
Civil Twilight 5:59 AM PDT 8:15 PM PDT
Nautical Twilight 5:21 AM PDT 8:53 PM PDT
Astronomical Twilight 4:40 AM PDT 9:34 PM PDT
Moon 8:46 PM PDT (9/3) 10:03 AM PDT (9/3)
Length of Visible Light 14h 16m
Length of Day
13h 12m
Waning Gibbous, 90% of the Moon is Illuminated
Sep 3
Waning Gibbous
Sep 8
Last Quarter
Sep 15
New
Sep 22
First Quarter
Sep 29
Full

Weather History Calendar

Precipitation Actual month total 0.03 Normal Month Total: 1.50
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
71 | 51 0.00
Average:
74 | 55 0.04
Partly Cloudy
Actual:
70 | 50 0.00
Average:
74 | 55 0.03
Partly Cloudy
Actual:
73 | 55 0.00
Average:
74 | 54 0.04
Clear
Actual:
76 | 52 0.00
Average:
74 | 54 0.05
Scattered Clouds
Actual:
79 | 53 0.00
Average:
74 | 54 0.04
Clear
Actual:
83 | 58 0.00
Average:
73 | 54 0.04
Scattered Clouds
Actual:
90 | 56 0.00
Average:
73 | 54 0.04
Partly Cloudy
Actual:
77 | 56 0.00
Average:
73 | 54 0.05
Overcast
Actual:
66 | 57 0.01
Average:
73 | 53 0.04
Rain
Actual:
68 | 53 0.01
Average:
72 | 53 0.04
Scattered Clouds
Actual:
68 | 48 0.00
Average:
72 | 53 0.05
Clear
Actual:
72 | 50 0.00
Average:
72 | 53 0.04
Scattered Clouds
Actual:
82 | 53 0.00
Average:
72 | 53 0.05
Scattered Clouds
Actual:
79 | 52 0.00
Average:
71 | 53 0.04
Partly Cloudy
Actual:
72 | 52 0.00
Average:
71 | 52 0.05
Scattered Clouds
Actual:
76 | 49 0.00
Average:
71 | 52 0.05
Fog
Actual:
82 | 53 0.00
Average:
70 | 52 0.04
Clear
Actual:
82 | 53 0.00
Average:
70 | 52 0.05
Fog
Actual:
75 | 53 0.00
Average:
70 | 52 0.05
Fog
Actual:
67 | 50 0.00
Average:
69 | 51 0.06
Overcast
Actual:
61 | 55 T
Average:
69 | 51 0.05
Rain
Actual:
67 | 53 0.01
Average:
69 | 51 0.06
Fog
Actual:
67 | 50 0.00
Average:
68 | 51 0.05
Partly Cloudy
Actual:
70 | 50 0.00
Average:
68 | 50 0.06
Partly Cloudy
Actual:
67 | 52 0.00
Average:
68 | 50 0.06
Fog
Actual:
67 | 49 0.00
Average:
67 | 50 0.07
Fog
Actual:
73 | 50 0.00
Average:
67 | 50 0.06
Rain
Actual:
77 | 54 T
Average:
67 | 50 0.07
Partly Cloudy
Actual:
69 | 54 0.00
Average:
66 | 49 0.06
Scattered Clouds
Actual:
70 | 46 0.00
Average:
66 | 49 0.07
 

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
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 71 61 51 49 48 45 89 65 40 30.17 30.13 30.03 10 10 10 10 5 14 0.00  
2 70 60 50 48 46 39 83 58 33 30.23 30.19 30.16 10 10 10 10 5 13 0.00  
3 73 64 55 52 50 48 86 64 41 30.21 30.18 30.15 10 10 10 14 7 17 0.00  
4 76 64 52 54 50 47 83 60 36 30.24 30.19 30.12 10 10 10 17 7 23 0.00  
5 79 66 53 54 52 48 93 66 38 30.13 30.04 29.97 10 10 10 17 6 20 0.00  
6 83 71 58 54 51 46 86 57 28 30.07 30.03 29.99 10 10 10 16 10 20 0.00  
7 90 73 56 53 48 38 80 49 17 30.16 30.10 30.05 10 10 10 14 7 17 0.00  
8 77 67 56 55 52 49 80 59 38 30.05 30.00 29.95 10 10 10 15 7 18 0.00  
9 66 62 57 54 50 48 86 73 60 30.05 30.02 29.98 10 10 10 18 11 23 0.01  
10 68 61 53 54 47 37 86 62 37 30.24 30.12 29.97 10 10 2 17 9 22 0.01 Rain
11 68 58 48 45 41 38 77 57 37 30.34 30.31 30.25 10 10 10 17 10 23 0.00  
12 72 61 50 45 44 40 80 59 37 30.38 30.31 30.24 10 10 10 21 13 24 0.00  
13 82 68 53 47 44 40 77 50 23 30.25 30.16 30.07 10 10 7 15 8 18 0.00  
14 79 66 52 52 48 43 83 56 28 30.11 30.08 30.04 10 10 9 9 3 12 0.00  
15 72 62 52 51 49 46 89 67 44 30.20 30.16 30.09 10 10 10 9 4 13 0.00  
16 76 63 49 52 50 47 89 64 38 30.25 30.19 30.14 10 10 10 13 5 15 0.00  
17 82 68 53 52 50 47 89 61 33 30.15 30.10 30.03 10 10 7 13 5 15 0.00 Fog
18 82 68 53 53 50 47 86 58 30 30.11 30.06 30.03 10 10 10 9 3 12 0.00  
19 75 64 53 54 52 48 93 70 46 30.19 30.14 30.07 10 4 0 10 4 13 0.00 Fog
20 67 59 50 53 51 48 100 79 58 30.15 30.10 30.07 10 5 0 12 6 15 0.00 Fog
21 61 58 55 52 51 50 86 78 69 30.17 30.16 30.13 10 10 7 10 5 13 T  
22 67 60 53 52 50 45 86 67 48 30.19 30.17 30.15 10 9 2 14 3 16 0.01 Rain
23 67 59 50 50 47 45 89 69 48 30.19 30.16 30.14 10 10 6 10 3 18 0.00 Fog
24 70 60 50 51 49 47 89 68 47 30.17 30.15 30.12 10 10 7 13 4 16 0.00  
25 67 60 52 52 50 48 93 73 52 30.17 30.14 30.12 10 10 10 10 4 13 0.00  
26 67 58 49 50 48 46 96 74 52 30.15 30.12 30.08 10 6 0 10 4 13 0.00 Fog
27 73 62 50 51 49 48 96 71 46 30.10 30.05 29.97 10 7 0 12 4 14 0.00 Fog
28 77 66 54 52 50 41 86 58 29 30.04 29.99 29.96 10 10 9 12 2 14 T Rain
29 69 62 54 55 47 42 86 63 39 30.31 30.19 30.05 10 10 10 18 10 21 0.00  
30 70 58 46 46 43 39 80 58 35 30.43 30.39 30.32 10 10 10 15 7 18 0.00