Weather History for San Juan, PR

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Monday, December 17, 2012

  Actual Average Record
Temperature  
Mean Temperature 79 °F 79 °F  
Max Temperature 85 °F 84 °F 90 °F (1987)
Min Temperature 72 °F 73 °F 65 °F (1916)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 July heating degree days 0 0  
Cooling Degree Days 14 14  
Month to date cooling degree days 255 238  
Year to date cooling degree days 5960 5670  
Growing Degree Days 28 (Base 50)    
Moisture  
Dew Point 68 °F    
Average Humidity 74    
Maximum Humidity 93    
Minimum Humidity 55    
Precipitation  
Precipitation 0.31 in 0.16 in 1.26 in (1948)
Month to date precipitation 3.22 2.86  
Year to date precipitation 53.12 54.19  
Sea Level Pressure  
Sea Level Pressure 29.97 in    
Wind  
Wind Speed 6 mph (East)    
Max Wind Speed 18 mph    
Max Gust Speed 22 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Dec. 17, 2012 Rise Set
Actual Time 6:49 AM AST 5:51 PM AST
Civil Twilight 6:25 AM AST 6:15 PM AST
Nautical Twilight 5:58 AM AST 6:42 PM AST
Astronomical Twilight 5:31 AM AST 7:09 PM AST
Moon 10:28 AM AST (12/17) 10:31 PM AST (12/17)
Length of Visible Light 11h 49m
Length of Day
11h 01m
Waxing Crescent, 24% of the Moon is Illuminated
Dec 17
Waxing Crescent
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Hourly Weather History & Observations

Time (AST) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 75.0 °F - 68.0 °F 79% 29.96 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:56 AM 73.9 °F - 66.9 °F 79% 29.96 in 10.0 mi Calm Calm - N/A   Partly Cloudy
2:56 AM 73.9 °F - 66.9 °F 79% 29.96 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 AM 73.9 °F - 69.1 °F 85% 29.96 in 10.0 mi Calm Calm - 0.00 in   Mostly Cloudy
4:56 AM 73.9 °F - 68.0 °F 82% 29.96 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:56 AM 73.0 °F - 66.9 °F 81% 29.96 in 10.0 mi Calm Calm - 0.01 in   Scattered Clouds
6:56 AM 73.9 °F - 66.9 °F 79% 29.98 in 9.0 mi NE 3.5 mph - 0.00 in Rain Light Rain
7:28 AM 73.4 °F - 69.8 °F 88% 29.99 in 2.5 mi ENE 3.5 mph - 0.10 in Rain Heavy Rain
7:39 AM 73.4 °F - 69.8 °F 88% 30.00 in 10.0 mi ENE 8.1 mph 16.1 mph 0.25 in Rain Rain
7:56 AM 73.9 °F - 71.1 °F 91% 30.00 in 10.0 mi ESE 5.8 mph - 0.29 in Rain Light Rain
8:56 AM 73.9 °F - 71.1 °F 91% 30.01 in 10.0 mi SSW 3.5 mph - 0.01 in   Mostly Cloudy
9:56 AM 79.0 °F - 71.1 °F 77% 30.02 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:56 AM 81.0 °F 84.9 °F 71.1 °F 72% 30.01 in 10.0 mi East 6.9 mph - N/A   Scattered Clouds
11:56 AM 84.0 °F 86.5 °F 66.9 °F 56% 29.99 in 10.0 mi East 11.5 mph - N/A   Scattered Clouds
12:56 PM 82.9 °F 85.4 °F 66.9 °F 58% 29.97 in 10.0 mi ENE 16.1 mph - N/A   Scattered Clouds
1:56 PM 82.9 °F 85.8 °F 68.0 °F 60% 29.94 in 10.0 mi ENE 16.1 mph - N/A   Partly Cloudy
2:56 PM 82.9 °F 85.8 °F 68.0 °F 60% 29.93 in 10.0 mi East 15.0 mph - N/A   Scattered Clouds
3:56 PM 82.0 °F 84.5 °F 66.9 °F 60% 29.93 in 10.0 mi ENE 12.7 mph - N/A   Scattered Clouds
4:56 PM 81.0 °F 83.8 °F 68.0 °F 65% 29.95 in 10.0 mi ENE 11.5 mph - N/A   Scattered Clouds
5:56 PM 79.0 °F - 68.0 °F 69% 29.95 in 10.0 mi East 10.4 mph - N/A   Scattered Clouds
8:56 PM 77.0 °F - 66.9 °F 71% 29.98 in 10.0 mi ESE 4.6 mph - N/A   Partly Cloudy
9:56 PM 77.0 °F - 66.9 °F 71% 29.99 in 10.0 mi ESE 3.5 mph - N/A   Partly Cloudy
10:56 PM 75.9 °F - 66.9 °F 74% 29.99 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:56 PM 75.0 °F - 66.9 °F 76% 29.97 in 10.0 mi Calm Calm - N/A   Partly Cloudy