Weather History for San Juan, PR

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Wednesday, May 13, 2009

  Actual Average Record
Temperature  
Mean Temperature 78 °F 82 °F  
Max Temperature 82 °F 87 °F 93 °F (1998)
Min Temperature 73 °F 76 °F 68 °F (1950)
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 13 17  
Month to date cooling degree days 193 212  
Year to date cooling degree days 1820 1853  
Growing Degree Days 28 (Base 50)    
Moisture  
Dew Point 74 °F    
Average Humidity 90    
Maximum Humidity 100    
Minimum Humidity 79    
Precipitation  
Precipitation 0.60 in 0.20 in 4.51 in (1986)
Month to date precipitation 2.67 2.51  
Year to date precipitation 14.49 15.29  
Sea Level Pressure  
Sea Level Pressure 29.99 in    
Wind  
Wind Speed 10 mph (East)    
Max Wind Speed 25 mph    
Max Gust Speed 31 mph    
Visibility 8 miles    
Events Rain , Thunderstorm    
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

May. 13, 2009 Rise Set
Actual Time 5:51 AM AST 6:49 PM AST
Civil Twilight 5:27 AM AST 7:13 PM AST
Nautical Twilight 5:00 AM AST 7:40 PM AST
Astronomical Twilight 4:32 AM AST 8:08 PM AST
Moon 10:50 PM AST (5/13) 9:15 AM AST (5/13)
Length of Visible Light 13h 45m
Length of Day
12h 58m
Waning Gibbous, 82% of the Moon is Illuminated
May 13
Waning Gibbous
May 17
Last Quarter
May 24
New
May 30
First Quarter
Jun 7
Full

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 - 75.0 °F 100% 29.97 in 10.0 mi East 4.6 mph - 0.03 in Thunderstorm Thunderstorm
1:56 AM 75.9 °F - 75.0 °F 97% 29.94 in 6.0 mi East 8.1 mph 17.3 mph 0.03 in Rain Light Rain
2:56 AM 75.0 °F - 73.9 °F 96% 29.94 in 4.0 mi East 12.7 mph - 0.04 in Rain Light Rain
3:56 AM 75.0 °F - 75.0 °F 100% 29.93 in 10.0 mi East 4.6 mph - 0.02 in   Scattered Clouds
4:56 AM 75.0 °F - 72.0 °F 90% 29.93 in 10.0 mi East 4.6 mph - N/A   Scattered Clouds
5:56 AM 75.9 °F - 73.0 °F 91% 29.95 in 6.0 mi East 8.1 mph - 0.00 in Rain Light Rain
6:56 AM 75.0 °F - 73.9 °F 96% 29.97 in 8.0 mi SE 4.6 mph - 0.11 in Rain Light Rain
7:56 AM 78.1 °F - 77.0 °F 96% 29.98 in 10.0 mi East 8.1 mph - 0.02 in   Mostly Cloudy
8:56 AM 82.0 °F 89.4 °F 75.9 °F 82% 29.99 in 10.0 mi ESE 10.4 mph - 0.00 in   Mostly Cloudy
9:56 AM 79.0 °F - 73.9 °F 84% 30.01 in 2.0 mi East 17.3 mph 24.2 mph 0.00 in Rain Rain
10:04 AM 77.0 °F - 73.4 °F 89% 30.01 in 1.5 mi East 23.0 mph 29.9 mph 0.04 in Rain Heavy Rain
10:56 AM 73.9 °F - 73.0 °F 97% 30.01 in 4.0 mi East 12.7 mph - 0.25 in Rain Light Rain
11:56 AM 78.1 °F - 72.0 °F 81% 30.02 in 7.0 mi East 12.7 mph 23.0 mph 0.00 in   Mostly Cloudy
12:56 PM 78.1 °F - 73.9 °F 87% 30.01 in 4.0 mi ESE 5.8 mph - 0.03 in Rain Light Rain
1:56 PM 78.1 °F - 73.9 °F 87% 29.99 in 6.0 mi ENE 10.4 mph - 0.02 in Rain Light Rain
2:56 PM 75.9 °F - 72.0 °F 87% 29.97 in 7.0 mi East 10.4 mph - 0.02 in   Mostly Cloudy
3:56 PM 78.1 °F - 75.0 °F 90% 29.97 in 9.0 mi East 9.2 mph - 0.01 in Rain Light Rain
4:56 PM 78.1 °F - 73.9 °F 87% 29.97 in 10.0 mi East 12.7 mph - 0.01 in   Overcast
5:56 PM 78.1 °F - 73.0 °F 84% 29.98 in 10.0 mi East 10.4 mph - 0.00 in   Overcast
6:56 PM 78.1 °F - 73.0 °F 84% 30.00 in 10.0 mi East 12.7 mph - 0.00 in   Overcast
7:56 PM 78.1 °F - 73.0 °F 84% 30.01 in 10.0 mi East 11.5 mph - 0.01 in Rain Light Rain
8:56 PM 78.1 °F - 73.0 °F 84% 30.02 in 10.0 mi East 12.7 mph - 0.00 in   Scattered Clouds
9:56 PM 78.1 °F - 73.0 °F 84% 30.04 in 10.0 mi East 9.2 mph - N/A   Scattered Clouds
10:56 PM 78.1 °F - 73.0 °F 84% 30.05 in 10.0 mi East 10.4 mph - 0.00 in Rain Light Rain
11:56 PM 77.0 °F - 72.0 °F 84% 30.04 in 10.0 mi East 9.2 mph - 0.01 in Rain Light Rain