Weather History for Portland Hillsboro, OR

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Monday, December 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 30 °F 38 °F  
Max Temperature 35 °F 45 °F 56 °F (1980)
Min Temperature 25 °F 32 °F 8 °F (1968)
Degree Days  
Heating Degree Days 35 27  
Month to date heating degree days 750 819  
Since 1 July heating degree days 1857 2121  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 232 198  
Moisture  
Dew Point 29 °F    
Average Humidity 95    
Maximum Humidity 100    
Minimum Humidity 89    
Precipitation  
Precipitation 0.01 in 0.20 in 0.91 in (1968)
Month to date precipitation 7.50 6.74  
Year to date precipitation 43.03 39.90  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.33 in    
Wind  
Wind Speed 3 mph (North)    
Max Wind Speed 9 mph    
Max Gust Speed 12 mph    
Visibility 6 miles    
Events Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 31, 2012 Rise Set
Actual Time 7:52 AM PST 4:38 PM PST
Civil Twilight 7:17 AM PST 5:12 PM PST
Nautical Twilight 6:40 AM PST 5:50 PM PST
Astronomical Twilight 6:04 AM PST 6:26 PM PST
Moon 8:26 PM PST (12/31) 9:26 AM PST (12/31)
Length of Visible Light 9h 54m
Length of Day
8h 46m
Waning Gibbous, 89% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:08 AM 26.1 °F - 24.1 °F 92% 30.30 in 3.0 mi Calm Calm - N/A   Clear
12:53 AM 28.0 °F - 26.1 °F 92% 30.31 in 9.0 mi Calm Calm - N/A   Clear
1:53 AM 28.9 °F 25.2 °F 27.0 °F 92% 30.33 in 10.0 mi WNW 3.5 mph - N/A   Clear
2:53 AM 28.9 °F - 27.0 °F 92% 30.33 in 10.0 mi Calm Calm - N/A   Clear
3:53 AM 28.9 °F - 27.0 °F 92% 30.31 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:47 AM 28.4 °F - 26.6 °F 93% 30.29 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
4:53 AM 28.0 °F - 26.1 °F 92% 30.30 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:53 AM 30.9 °F 27.5 °F 28.9 °F 92% 30.29 in 8.0 mi South 3.5 mph - N/A   Overcast
6:05 AM 30.9 °F 27.5 °F 28.9 °F 92% 30.28 in 6.0 mi SSE 3.5 mph - N/A   Overcast
6:53 AM 30.0 °F - 28.9 °F 96% 30.29 in 3.0 mi Calm Calm - N/A   Mostly Cloudy
7:53 AM 30.0 °F - 28.0 °F 92% 30.30 in 4.0 mi Calm Calm - N/A   Overcast
8:53 AM 30.9 °F - 28.9 °F 92% 30.31 in 5.0 mi Calm Calm - N/A   Overcast
9:53 AM 30.9 °F - 30.0 °F 96% 30.32 in 4.0 mi Calm Calm - N/A   Overcast
10:53 AM 30.9 °F 27.5 °F 28.9 °F 92% 30.33 in 8.0 mi WNW 3.5 mph - N/A   Overcast
11:53 AM 32.0 °F 27.5 °F 30.9 °F 96% 30.33 in 4.0 mi WSW 4.6 mph - 0.01 in Snow Light Snow
12:53 PM 34.0 °F - 32.0 °F 92% 30.31 in 5.0 mi Calm Calm - 0.00 in Snow Light Snow
1:00 PM 34.0 °F - 30.9 °F 89% 30.30 in 5.0 mi Calm Calm - 0.00 in Snow Light Snow
1:53 PM 35.1 °F - 30.9 °F 85% 30.30 in 7.0 mi Calm Calm - 0.00 in   Overcast
2:53 PM 35.1 °F 31.0 °F 30.9 °F 85% 30.32 in 7.0 mi NNE 4.6 mph - 0.00 in Snow Light Snow
3:14 PM 34.0 °F 28.0 °F 30.0 °F 85% 30.32 in 2.5 mi NE 6.9 mph - 0.00 in Snow Light Snow
3:24 PM 34.0 °F 28.8 °F 30.0 °F 85% 30.32 in 4.0 mi NE 5.8 mph - 0.00 in Snow Light Snow
3:32 PM 34.0 °F 28.8 °F 30.9 °F 89% 30.32 in 2.5 mi NE 5.8 mph - 0.00 in Snow Light Snow
3:53 PM 34.0 °F 31.0 °F 30.9 °F 89% 30.35 in 2.5 mi NE 3.5 mph - 0.00 in Snow Light Snow
4:53 PM 33.1 °F - 30.9 °F 92% 30.35 in 2.0 mi Calm Calm - 0.00 in Snow Light Snow
5:44 PM 33.1 °F 30.0 °F 32.0 °F 96% 30.35 in 8.0 mi NW 3.5 mph - 0.00 in   Overcast
6:53 PM 33.1 °F 28.7 °F 32.0 °F 96% 30.37 in 7.0 mi WNW 4.6 mph - 0.00 in   Overcast
8:53 PM 32.0 °F 26.4 °F 30.0 °F 92% 30.38 in 10.0 mi East 5.8 mph - 0.00 in Snow Light Snow
10:53 PM 30.9 °F 25.2 °F 30.0 °F 96% 30.43 in 7.0 mi North 5.8 mph - 0.00 in   Clear
11:01 PM 32.0 °F 26.4 °F 30.0 °F 92% 30.42 in 8.0 mi North 5.8 mph - N/A   Scattered Clouds
11:53 PM 32.0 °F 25.6 °F 28.9 °F 88% 30.45 in 8.0 mi NNE 6.9 mph - N/A   Clear