Weather History for Portland, ME

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Friday, December 21, 2012

  Actual Average Record
Temperature  
Mean Temperature 43 °F 27 °F  
Max Temperature 53 °F 36 °F 60 °F (1957)
Min Temperature 32 °F 18 °F -14 °F (1955)
Degree Days  
Heating Degree Days 22 38  
Month to date heating degree days 631 723  
Since 1 July heating degree days 1968 2214  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 492 359  
Moisture  
Dew Point 39 °F    
Average Humidity 85    
Maximum Humidity 96    
Minimum Humidity 74    
Precipitation  
Precipitation 0.99 in 0.13 in 2.05 in (1946)
Month to date precipitation 6.54 2.83  
Year to date precipitation 52.71 46.06  
Snow  
Snow T in 0.50 in 14.50 in (2008)
Month to date snowfall 4.9 7.9  
Since 1 July snowfall 7.8 9.8  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.56 in    
Wind  
Wind Speed 15 mph (ESE)    
Max Wind Speed 39 mph    
Max Gust Speed 54 mph    
Visibility 6 miles    
Events Rain , Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 21, 2012 Rise Set
Actual Time 7:11 AM EST 4:07 PM EST
Civil Twilight 6:38 AM EST 4:40 PM EST
Nautical Twilight 6:02 AM EST 5:16 PM EST
Astronomical Twilight 5:27 AM EST 5:51 PM EST
Moon 12:00 PM EST (12/21) 12:47 AM EST (12/21)
Length of Visible Light 10h 01m
Length of Day
8h 55m
Waxing Gibbous, 64% of the Moon is Illuminated
Dec 21
Waxing Gibbous
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:02 AM 32.0 °F 25.6 °F 30.2 °F 93% 30.07 in 1.5 mi NE 6.9 mph - 0.00 in Snow Light Snow
12:13 AM 32.0 °F 26.4 °F 30.2 °F 93% 30.07 in 2.0 mi NE 5.8 mph - 0.00 in Snow Light Snow
12:17 AM 32.0 °F 26.4 °F 30.2 °F 93% 30.07 in 1.8 mi NE 5.8 mph - 0.01 in Snow Light Snow
12:27 AM 32.0 °F 27.5 °F 30.2 °F 93% 30.07 in 2.0 mi NE 4.6 mph - 0.01 in Snow Light Snow
12:51 AM 32.0 °F 27.5 °F 30.0 °F 92% 30.07 in 1.8 mi NE 4.6 mph - 0.01 in Snow Light Snow
1:00 AM 32.0 °F 27.5 °F 30.2 °F 93% 30.06 in 3.0 mi NNE 4.6 mph - 0.01 in Snow Light Snow
1:51 AM 33.1 °F 28.7 °F 30.9 °F 92% 30.05 in 2.5 mi North 4.6 mph - 0.01 in Snow Light Snow
1:58 AM 33.8 °F 30.8 °F 30.2 °F 87% 30.04 in 4.0 mi North 3.5 mph - 0.00 in Snow Light Snow
2:51 AM 33.1 °F 26.9 °F 30.9 °F 92% 29.99 in 9.0 mi NNE 6.9 mph - 0.01 in   Overcast
3:51 AM 34.0 °F 28.0 °F 32.0 °F 92% 29.94 in 10.0 mi NNE 6.9 mph - 0.00 in   Overcast
4:51 AM 34.0 °F 26.0 °F 32.0 °F 92% 29.92 in 3.0 mi NNE 10.4 mph - 0.08 in Rain Rain
5:51 AM 39.0 °F 32.3 °F 37.0 °F 93% 29.87 in 4.0 mi ESE 10.4 mph - 0.06 in Rain Light Rain
6:51 AM 42.1 °F 35.2 °F 37.9 °F 85% 29.81 in 6.0 mi ESE 12.7 mph - 0.08 in Rain Light Rain
7:51 AM 43.0 °F 34.2 °F 37.9 °F 82% 29.73 in 10.0 mi East 20.7 mph 28.8 mph 0.00 in   Overcast
8:51 AM 44.1 °F 36.8 °F 37.0 °F 76% 29.75 in 10.0 mi ESE 16.1 mph 27.6 mph N/A   Overcast
9:51 AM 46.0 °F 38.8 °F 39.9 °F 79% 29.70 in 8.0 mi SE 18.4 mph 28.8 mph N/A   Overcast
10:24 AM 46.4 °F 38.7 °F 42.8 °F 87% 29.64 in 10.0 mi ESE 20.7 mph 29.9 mph N/A   Overcast
10:27 AM 46.4 °F 38.5 °F 42.8 °F 87% 29.63 in 9.0 mi East 21.9 mph 29.9 mph N/A   Overcast
10:35 AM 46.4 °F 39.5 °F 42.8 °F 87% 29.62 in 4.0 mi ESE 17.3 mph 28.8 mph 0.01 in Rain Light Rain
10:51 AM 46.0 °F 38.3 °F 43.0 °F 89% 29.60 in 2.0 mi ESE 20.7 mph 29.9 mph 0.03 in Rain Light Rain
11:51 AM 46.9 °F - 44.1 °F 90% 29.48 in 2.0 mi East 28.8 mph 35.7 mph 0.07 in Rain Light Rain
12:13 PM 46.4 °F 37.5 °F 44.6 °F 93% 29.45 in 2.0 mi ESE 27.6 mph 38.0 mph 0.01 in Rain Light Rain
12:51 PM 48.0 °F - 46.0 °F 93% 29.41 in 2.0 mi East 26.5 mph 36.8 mph 0.06 in Rain Rain
1:27 PM 48.2 °F - 46.4 °F 93% 29.34 in 1.5 mi East 25.3 mph 33.4 mph 0.14 in Rain Rain
1:51 PM 50.0 °F - 48.0 °F 93% 29.30 in 1.5 mi ESE 23.0 mph 33.4 mph 0.22 in Rain Rain
2:51 PM 51.1 °F - 48.9 °F 92% 29.20 in 1.5 mi ESE 26.5 mph 44.9 mph 0.10 in Rain Rain
3:51 PM 52.0 °F - 50.0 °F 93% 29.13 in 1.5 mi ESE 28.8 mph 48.3 mph 0.09 in Rain Rain
4:51 PM 50.0 °F - 48.2 °F 94% 29.14 in 1.5 mi South 20.7 mph 35.7 mph N/A Rain Rain
4:58 PM 50.0 °F - 48.2 °F 94% 29.14 in 1.5 mi SSE 15.0 mph 27.6 mph 0.01 in Rain Light Rain
5:16 PM 48.2 °F - 46.4 °F 93% 29.13 in 1.5 mi SSE 12.7 mph 19.6 mph 0.04 in Rain Light Rain
5:51 PM 48.9 °F - 44.1 °F 83% 29.11 in 10.0 mi SSE 9.2 mph - 0.05 in   Overcast
6:51 PM 50.0 °F - 43.0 °F 77% 29.11 in 10.0 mi South 15.0 mph 21.9 mph N/A   Mostly Cloudy
7:51 PM 46.9 °F - 41.0 °F 80% 29.12 in 10.0 mi South 10.4 mph - N/A   Clear
8:51 PM 46.0 °F 41.4 °F 39.9 °F 79% 29.12 in 10.0 mi SSW 9.2 mph - N/A   Scattered Clouds
9:51 PM 44.1 °F 38.6 °F 39.0 °F 82% 29.13 in 10.0 mi SSW 10.4 mph - N/A   Partly Cloudy
10:51 PM 42.1 °F 37.1 °F 35.1 °F 76% 29.16 in 10.0 mi SW 8.1 mph - N/A   Overcast
11:27 PM 41.0 °F 35.8 °F 33.8 °F 76% 29.16 in 10.0 mi SW 8.1 mph - N/A   Overcast
11:51 PM 41.0 °F 35.8 °F 34.0 °F 76% 29.16 in 10.0 mi SW 8.1 mph - N/A   Overcast