Weather History for Portland, OR

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Saturday, September 1, 2012

  Actual Average Record
Temperature  
Mean Temperature 63 °F 68 °F  
Max Temperature 76 °F 79 °F 98 °F (1988)
Min Temperature 50 °F 56 °F 44 °F (1973)
Degree Days  
Heating Degree Days 2 1  
Month to date heating degree days 2 1  
Since 1 July heating degree days 19 28  
Cooling Degree Days 0 3  
Month to date cooling degree days 0 3  
Year to date cooling degree days 356 366  
Growing Degree Days 12 (Base 50)    
Moisture  
Dew Point 47 °F    
Average Humidity 58    
Maximum Humidity 83    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in 0.03 in 1.48 in (1971)
Month to date precipitation 0.00 0.03  
Year to date precipitation 28.47 20.47  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.11 in    
Wind  
Wind Speed 5 mph (NW)    
Max Wind Speed 10 mph    
Max Gust Speed 15 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Sep. 01, 2012 Rise Set
Actual Time 6:32 AM PDT 7:47 PM PDT
Civil Twilight 6:01 AM PDT 8:17 PM PDT
Nautical Twilight 5:24 AM PDT 8:54 PM PDT
Astronomical Twilight 4:45 AM PDT 9:33 PM PDT
Moon 7:58 PM PDT (9/1) 7:52 AM PDT (9/1)
Length of Visible Light 14h 15m
Length of Day
13h 14m
Full, 98% of the Moon is Illuminated
Sep 1
Full
Sep 8
Last Quarter
Sep 15
New
Sep 22
First Quarter
Sep 29
Full

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 57.9 °F 48.0 °F 70% 30.03 in 10.0 mi NW 5.8 mph - N/A   Clear
1:53 AM 57.0 °F 48.0 °F 72% 30.04 in 10.0 mi NW 8.1 mph - N/A   Clear
2:53 AM 55.9 °F 48.0 °F 75% 30.06 in 10.0 mi NW 3.5 mph - N/A   Clear
3:53 AM 55.0 °F 48.0 °F 77% 30.07 in 10.0 mi NW 3.5 mph - N/A   Clear
4:53 AM 55.4 °F 48.2 °F 77% 30.08 in 10.0 mi North 4.6 mph - N/A   Clear
5:53 AM 51.1 °F 46.0 °F 83% 30.09 in 10.0 mi Calm Calm - N/A   Clear
6:23 AM 51.8 °F 46.4 °F 82% 30.10 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:53 AM 50.0 °F 45.0 °F 83% 30.11 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:53 AM 54.0 °F 48.0 °F 80% 30.12 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:53 AM 57.0 °F 48.9 °F 74% 30.14 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:53 AM 59.0 °F 48.0 °F 67% 30.15 in 10.0 mi NW 5.8 mph - N/A   Scattered Clouds
10:53 AM 63.0 °F 48.0 °F 58% 30.15 in 10.0 mi NNW 6.9 mph - N/A   Scattered Clouds
11:53 AM 64.0 °F 46.9 °F 54% 30.15 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
12:53 PM 66.9 °F 46.9 °F 49% 30.14 in 10.0 mi WNW 10.4 mph - N/A   Partly Cloudy
1:53 PM 69.1 °F 48.0 °F 47% 30.13 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
2:53 PM 72.0 °F 46.0 °F 40% 30.12 in 10.0 mi Variable 5.8 mph - N/A   Partly Cloudy
3:53 PM 73.9 °F 45.0 °F 35% 30.10 in 10.0 mi WNW 6.9 mph - N/A   Scattered Clouds
4:53 PM 75.0 °F 44.1 °F 33% 30.10 in 10.0 mi Variable 5.8 mph - N/A   Partly Cloudy
5:53 PM 75.0 °F 46.9 °F 37% 30.09 in 10.0 mi NW 8.1 mph - N/A   Partly Cloudy
6:53 PM 73.0 °F 46.9 °F 39% 30.09 in 10.0 mi NNW 8.1 mph - N/A   Partly Cloudy
7:53 PM 69.1 °F 44.1 °F 40% 30.10 in 10.0 mi NNW 6.9 mph - N/A   Scattered Clouds
8:53 PM 66.0 °F 46.9 °F 50% 30.12 in 10.0 mi NNW 6.9 mph - N/A   Partly Cloudy
9:53 PM 63.0 °F 46.9 °F 56% 30.14 in 10.0 mi Variable 4.6 mph - N/A   Scattered Clouds
10:53 PM 59.0 °F 46.9 °F 64% 30.14 in 10.0 mi NNW 10.4 mph - N/A   Scattered Clouds
11:53 PM 59.0 °F 46.9 °F 64% 30.15 in 10.0 mi NW 9.2 mph - N/A   Clear