Weather History for Portland, OR

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Month of September, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 79 °F 60 °F
Mean Temperature 77 °F 68 °F 57 °F
Min Temperature 62 °F 56 °F 47 °F
Degree Days  
Heating Degree Days (base 65) 8 1 0 28
Cooling Degree Days (base 65) 12 4 0 114
Growing Degree Days (base 50) 26 17 6 520
Dew Point  
Dew Point 63 °F 52 °F 33 °F
Precipitation  
Precipitation 0.12 in 0.02 in 0.00 in 0.51 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 26 mph 5 mph 0 mph
Gust Wind 35 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.35 in 30.02 in 29.65 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 03, 2011 Rise Set
Actual Time 6:33 AM PDT 7:44 PM PDT
Civil Twilight 6:03 AM PDT 8:15 PM PDT
Nautical Twilight 5:26 AM PDT 8:51 PM PDT
Astronomical Twilight 4:47 AM PDT 9:30 PM PDT
Moon 1:46 PM PDT (9/3) 10:49 PM PDT (9/3)
Length of Visible Light 14h 11m
Length of Day
13h 10m
Waxing Crescent, 39% of the Moon is Illuminated
Sep 3
Waxing Crescent
Sep 4
First Quarter
Sep 12
Full
Sep 20
Last Quarter
Sep 27
New

Weather History Calendar

Precipitation Actual month total 0.51 Normal Month Total: 1.47
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
78 | 54 0.00
Average:
79 | 56 0.03
Scattered Clouds
Actual:
76 | 52 0.00
Average:
79 | 56 0.04
Partly Cloudy
Actual:
87 | 51 0.00
Average:
79 | 56 0.03
Scattered Clouds
Actual:
89 | 55 0.00
Average:
79 | 56 0.04
Clear
Actual:
88 | 55 0.00
Average:
79 | 56 0.04
Clear
Actual:
91 | 57 0.00
Average:
78 | 55 0.05
Scattered Clouds
Actual:
93 | 61 0.00
Average:
78 | 55 0.04
Partly Cloudy
Actual:
89 | 62 0.00
Average:
78 | 55 0.04
Scattered Clouds
Actual:
91 | 61 0.00
Average:
78 | 55 0.04
Scattered Clouds
Actual:
92 | 60 0.00
Average:
78 | 55 0.04
Scattered Clouds
Actual:
93 | 59 0.00
Average:
77 | 54 0.05
Scattered Clouds
Actual:
76 | 57 0.00
Average:
77 | 54 0.04
Partly Cloudy
Actual:
70 | 59 0.00
Average:
77 | 54 0.04
Overcast
Actual:
67 | 59 0.00
Average:
77 | 54 0.05
Rain
Actual:
67 | 60 0.02
Average:
76 | 53 0.04
Fog
Actual:
71 | 54 T
Average:
76 | 53 0.05
Rain
Actual:
60 | 53 0.06
Average:
76 | 53 0.05
Rain
Actual:
67 | 58 0.11
Average:
76 | 53 0.05
Rain
Actual:
72 | 58 0.02
Average:
75 | 52 0.05
Partly Cloudy
Actual:
82 | 50 0.00
Average:
75 | 52 0.06
Partly Cloudy
Actual:
85 | 58 0.00
Average:
75 | 52 0.05
Partly Cloudy
Actual:
80 | 57 0.00
Average:
74 | 52 0.06
Scattered Clouds
Actual:
86 | 59 0.00
Average:
74 | 51 0.06
Partly Cloudy
Actual:
84 | 62 0.00
Average:
73 | 51 0.05
Rain
Actual:
67 | 58 0.12
Average:
73 | 51 0.06
Rain
Actual:
72 | 54 0.08
Average:
73 | 51 0.07
Rain
Actual:
68 | 57 0.09
Average:
72 | 50 0.06
Fog
Actual:
75 | 47 0.01
Average:
72 | 50 0.06
Scattered Clouds
Actual:
81 | 49 0.00
Average:
71 | 50 0.07
Partly Cloudy
Actual:
74 | 52 T
Average:
71 | 50 0.06
 

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 78 66 54 52 49 45 89 60 31 30.20 30.15 30.10 10 10 10 14 6 17 0.00  
2 76 64 52 54 50 46 89 65 41 30.22 30.17 30.10 10 10 10 17 5 23 0.00  
3 87 69 51 50 43 34 83 50 16 30.11 30.00 29.88 10 10 10 26 9 32 0.00  
4 89 72 55 52 47 38 77 47 17 29.91 29.87 29.81 10 10 10 9 5 12 0.00  
5 88 72 55 55 50 37 80 50 19 30.02 29.93 29.88 10 10 10 12 3 15 0.00  
6 91 74 57 57 53 45 86 54 21 30.11 30.06 30.00 10 10 10 15 5 20 0.00  
7 93 77 61 62 54 50 84 54 23 30.06 30.01 29.94 10 10 9 13 4 14 0.00  
8 89 76 62 59 55 53 78 55 32 30.13 30.09 30.04 10 10 10 17 4 20 0.00  
9 91 76 61 57 55 52 72 51 29 30.16 30.07 29.96 10 10 10 18 4 28 0.00  
10 92 76 60 61 56 54 78 54 30 29.98 29.89 29.78 10 10 10 14 3 24 0.00  
11 93 76 59 61 57 49 84 54 24 29.96 29.83 29.78 10 10 10 7 1 10 0.00  
12 76 67 57 59 54 52 80 65 49 30.12 30.08 29.99 10 10 10 13 7 14 0.00  
13 70 65 59 56 55 54 87 74 61 30.16 30.12 30.07 10 10 10 12 4 16 0.00  
14 67 63 59 54 52 50 78 67 56 30.08 30.03 29.98 10 10 10 12 6 13 0.00  
15 67 64 60 57 52 48 72 62 52 30.02 30.00 29.98 10 9 2 10 2 13 0.02 Fog , Rain
16 71 63 54 56 48 36 100 65 30 30.06 30.02 30.00 10 10 5 12 5 16 T Fog
17 60 57 53 55 50 43 86 76 66 30.12 30.09 30.06 10 10 6 10 6 14 0.06 Rain
18 67 63 58 61 58 54 90 84 78 30.18 30.13 30.09 10 9 2 14 7 16 0.11 Rain
19 72 65 58 61 53 46 93 67 41 30.22 30.15 30.11 10 10 6 12 6 15 0.02 Rain
20 82 66 50 59 52 48 96 66 35 30.13 30.08 30.00 10 9 1 6 1 9 0.00  
21 85 72 58 61 52 45 87 57 26 30.04 29.99 29.94 10 10 10 10 4 14 0.00  
22 80 69 57 60 55 52 84 63 42 30.06 30.01 29.99 10 10 10 10 5 13 0.00  
23 86 73 59 63 57 53 78 58 37 30.07 29.98 29.87 10 10 9 13 5 14 0.00  
24 84 73 62 61 57 43 93 62 30 29.90 29.78 29.65 10 8 3 9 4 10 0.00  
25 67 63 58 57 53 49 87 70 52 30.00 29.88 29.70 10 10 6 24 12 33 0.12 Rain
26 72 63 54 56 52 48 86 65 44 30.03 29.96 29.92 10 10 6 21 11 28 0.08 Rain
27 68 63 57 56 53 48 93 73 52 30.32 30.14 30.02 10 9 4 18 5 24 0.09 Rain
28 75 61 47 49 44 33 93 58 23 30.35 30.24 30.02 10 7 0 23 7 35 0.01 Fog
29 81 65 49 47 44 37 86 56 26 30.01 29.91 29.81 10 10 10 16 7 20 0.00  
30 74 63 52 53 50 47 83 64 44 29.89 29.87 29.84 10 10 10 12 4 14 T