Weather History for Portland, OR

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Friday, December 16, 2011

  Actual Average Record
Temperature  
Mean Temperature 42 °F 40 °F  
Max Temperature 50 °F 45 °F 60 °F (1974)
Min Temperature 34 °F 35 °F 6 °F (1964)
Degree Days  
Heating Degree Days 23 25  
Month to date heating degree days 453 383  
Since 1 July heating degree days 1386 1352  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 362 424  
Moisture  
Dew Point 37 °F    
Average Humidity 86    
Maximum Humidity 100    
Minimum Humidity 71    
Precipitation  
Precipitation 0.00 in 0.17 in 1.19 in (1994)
Month to date precipitation 0.06 2.97  
Year to date precipitation 34.65 33.51  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.47 in    
Wind  
Wind Speed 2 mph (ESE)    
Max Wind Speed 8 mph    
Max Gust Speed 8 mph    
Visibility 5 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 16, 2011 Rise Set
Actual Time 7:44 AM PST 4:27 PM PST
Civil Twilight 7:10 AM PST 5:01 PM PST
Nautical Twilight 6:32 AM PST 5:39 PM PST
Astronomical Twilight 5:56 AM PST 6:15 PM PST
Moon 11:25 PM PST (12/16) 11:16 AM PST (12/16)
Length of Visible Light 9h 51m
Length of Day
8h 42m
Waning Gibbous, 63% of the Moon is Illuminated
Dec 16
Waning Gibbous
Dec 17
Last Quarter
Dec 24
New
Dec 31
First Quarter
Jan 8
Full

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 41.0 °F 39.0 °F 37.4 °F 87% 30.51 in 10.0 mi East 3.5 mph - N/A   Overcast
1:28 AM 41.0 °F 36.4 °F 37.4 °F 87% 30.50 in 10.0 mi ESE 6.9 mph - N/A   Overcast
1:53 AM 41.0 °F 39.0 °F 37.4 °F 87% 30.51 in 10.0 mi ESE 3.5 mph - N/A   Overcast
2:34 AM 39.2 °F - 37.4 °F 93% 30.51 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:53 AM 39.0 °F 35.7 °F 37.0 °F 93% 30.51 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
3:14 AM 39.2 °F 35.0 °F 37.4 °F 93% 30.50 in 10.0 mi SE 5.8 mph - N/A   Overcast
3:53 AM 39.9 °F 37.8 °F 37.0 °F 89% 30.50 in 10.0 mi East 3.5 mph - N/A   Overcast
4:21 AM 39.2 °F - 37.4 °F 93% 30.51 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:53 AM 39.0 °F 36.8 °F 37.0 °F 93% 30.51 in 10.0 mi ESE 3.5 mph - N/A   Mostly Cloudy
5:53 AM 39.0 °F 36.8 °F 37.0 °F 93% 30.52 in 8.0 mi SE 3.5 mph - N/A   Overcast
6:32 AM 39.2 °F 35.0 °F 37.4 °F 93% 30.51 in 8.0 mi ESE 5.8 mph - N/A   Overcast
6:45 AM 39.2 °F 35.0 °F 37.4 °F 93% 30.52 in 8.0 mi ESE 5.8 mph - N/A   Overcast
6:53 AM 39.0 °F 34.8 °F 37.0 °F 93% 30.52 in 8.0 mi ESE 5.8 mph - N/A   Overcast
7:53 AM 39.0 °F - 37.0 °F 93% 30.52 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
8:53 AM 37.9 °F 35.5 °F 36.0 °F 93% 30.53 in 7.0 mi ESE 3.5 mph - N/A   Mostly Cloudy
9:53 AM 41.0 °F 39.0 °F 37.9 °F 89% 30.53 in 9.0 mi ESE 3.5 mph - N/A   Scattered Clouds
10:53 AM 44.1 °F - 39.0 °F 82% 30.52 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:53 AM 44.6 °F 43.1 °F 39.2 °F 81% 30.50 in 10.0 mi North 3.5 mph - N/A   Scattered Clouds
12:53 PM 46.0 °F - 39.0 °F 76% 30.47 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:53 PM 48.9 °F - 39.9 °F 71% 30.45 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:53 PM 48.9 °F - 41.0 °F 74% 30.45 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:53 PM 45.0 °F 41.8 °F 41.0 °F 86% 30.45 in 8.0 mi WNW 5.8 mph - N/A   Scattered Clouds
4:46 PM 41.0 °F 38.0 °F 39.2 °F 93% 30.45 in 3.0 mi WNW 4.6 mph - N/A   Scattered Clouds
4:53 PM 39.9 °F 36.7 °F 39.0 °F 97% 30.45 in 4.0 mi West 4.6 mph - N/A   Scattered Clouds
5:24 PM 39.2 °F 37.0 °F 37.4 °F 93% 30.45 in 4.0 mi West 3.5 mph - N/A   Scattered Clouds
5:53 PM 37.9 °F - 37.0 °F 97% 30.45 in 0.2 mi Calm Calm - N/A Fog Fog
6:53 PM 37.9 °F - 37.0 °F 97% 30.45 in 0.2 mi Calm Calm - N/A Fog Fog
7:13 PM 37.4 °F - 35.6 °F 93% 30.45 in 0.2 mi Calm Calm - N/A Fog Fog
7:28 PM 37.4 °F - 35.6 °F 93% 30.45 in 0.2 mi Calm Calm - N/A Fog Fog
7:53 PM 37.0 °F - 35.1 °F 93% 30.45 in 0.2 mi Calm Calm - N/A Fog Fog
8:53 PM 36.0 °F - 35.1 °F 97% 30.45 in 0.2 mi Calm Calm - N/A Fog Fog
9:29 PM 33.8 °F - 33.8 °F 100% 30.45 in 0.2 mi Calm Calm - N/A Fog Fog
9:37 PM 35.6 °F - 33.8 °F 93% 30.44 in 0.1 mi Calm Calm - N/A Fog Fog
9:53 PM 35.6 °F - 35.6 °F 100% 30.44 in 0.1 mi Calm Calm - N/A Fog Fog
10:07 PM 35.6 °F - 33.8 °F 93% 30.44 in 0.2 mi Calm Calm - N/A Fog Fog
10:12 PM 35.6 °F - 35.6 °F 100% 30.44 in 0.2 mi Calm Calm - N/A Fog Fog
10:32 PM 35.6 °F - 33.8 °F 93% 30.44 in 0.2 mi Calm Calm - N/A Fog Fog
10:53 PM 35.6 °F - 33.8 °F 93% 30.44 in 0.2 mi Calm Calm - N/A Fog Fog
11:07 PM 35.6 °F - 35.6 °F 100% 30.44 in 0.2 mi Calm Calm - N/A Fog Fog
11:13 PM 35.6 °F - 33.8 °F 93% 30.43 in 0.8 mi Calm Calm - N/A   Mist
11:27 PM 35.6 °F - 35.6 °F 100% 30.43 in 0.5 mi Calm Calm - N/A Fog Fog
11:44 PM 35.6 °F - 33.8 °F 93% 30.43 in 0.8 mi Calm Calm - N/A   Mostly Cloudy
11:53 PM 35.1 °F - 34.0 °F 96% 30.43 in 0.8 mi Calm Calm - N/A   Mostly Cloudy