December 2012 Climate Report for Puerto Rico and the U.S. Virgin Islands

December 2012 Highlights

New Records for December 2012

 San Juan  

Date

New Record

Previous Record

December 2012

December 2012 ended as the ninth warmest December on record with an average temperature of 79.4°F.

December 1980 ended as the warmest December on record with an average temperature of 80.7°F.

Saint Croix 

Date

New Record

Previous Record

 December 08th

A record high temperature of 88°F.  

This tied the previous record of 88°F set back in 2009, 1997, 1993 and 1963. 

December 09th

A record high temperature of 88°F.

This tied the previous record of 88°F set back in 2002, 1997 and 1986.

December 12th

A record high temperature of 88°F.

This tied the previous record of 88°F set back in 1995, 1985, 1980 and 1963.

December 16th

A record low temperature of 67°F.

This broke the previous record of 69°F set back in 1980, 1964 and 1962.

December 2012 Statistics

 Average December Temperatures/Precipitation (NCDC 1981-2010 averages):

 

San Juan

Saint Thomas

Saint Croix

High

83.9°F

85.6°F

84.7°F

Low

73.4°F

73.5°F

73.4°F

Avg. T

78.7°F

79.5°F

79.0°F

Pcpn.

5.02’’

2.96’’

2.97’’

  December 2012 Observations:

 

San Juan

Saint Thomas

Saint Croix

High

84.7°F(+0.8°F)

84.1°F(-1.5°F)

85.3°F(+0.6°F)

Low

 74.1°F(+0.7°F)

 74.0°F(+0.5°F)

72.4°F(-1.0°F)

Avg. T

 79.4°F(+0.7°F)

79.0°F(-0.5°F)

78.9°F(-0.1°F)

Pcpn.

5.31" (+0.29")

2.34"(-0.62")

2.18"(-0.79")

 December 2012 extremes:

 

San Juan

Saint Thomas

Saint Croix

High

 87°F December 27th, 12th and 09th

 86°F December 28th, 12th and 09th

 88°F December 12th, 09th and 08th

Low

71°F December 16th 

 70°F December 30th

 65°F December 15th

Rainfall Accumulations Year to Date (YTD)    

Figure A – Graphical Display of precipitation for December 2012 across Puerto Rico and the U.S. Virgin Islands derived from a combination of rain gage and radar data.

Figure B – Graphical Display of annual precipitation across Puerto Rico and the U.S. Virgin Islands derived from a combination of rain gage and radar data.

Figure C – Graphical display of departure from normal precipitation during 2012.

December Historical Statistics              

Highest December Temperatures on record:

San Juan

Saint Thomas

Saint Croix

94°F December 6th 1989

92°F December 26th 1995

92°F December 27th 1995

91°F December 24th 1995

92°F December 25th 1995

90°F December 10th 1998

91°F December 26th 1994

90°F December 11th 1995

90°F December 29th 1972

Lowest  December Temperatures on record: 

San Juan

Saint Thomas

Saint Croix

62°F December 29th 1917

62°F December 5th 1942

61°F December 29th 1982

63°F December 22nd 1964

63°F December 24th 1991

61°F December 24th 1964

63°F December 30th 1917

63°F December 27th 1972

62°F December 28th 1980

Wettest Decembers:

San Juan

Saint Thomas

Saint Croix

 16.81" 1981 

9.87"   1960 

14.03"   1960 

15.40" 1910 

7.45"   1963 

 9.07"   1975

12.64" 1922 

 6.66"   1981

7.86"   2001 

Driest Decembers:

San Juan

Saint Thomas

Saint Croix

0.63"   1963

 0.63"   1963

0.37"   2010 

 0.98"   1925

 0.76"   1956

0.75"   2008 

1.02"   1997 

1.12"   2000 

0.79"   1963 

Decadal December Observations for San Juan, Puerto Rico

 

2010-2012

2000’s

1990’s

1980’s

1970’s

1960’s

High

83.3°F

83.8°F

84.4°F

84.5°F

83.7°F

83.3°F

Low

73.2°F

72.8°F

72.5°F

72.4°F

73.3°F

71.1°F

Avg. T

78.2°F

78.3°F

78.5°F

78.4°F

78.5°F

77.2°F

Pcpn.

6.99"

5.19’’

4.08’’

5.36’’

4.57’’

4.54’’

Looking ahead toward the month of January

Average January Temperatures/Precipitation (NCDC 1981-2010 averages):

 

 

San Juan

Saint Thomas

Saint Croix

High

83.2°F

85.1°F

84.0°F

Low

72.0°F

72.5°F

72.4°F

Avg. T

77.6°F

78.8°F

78.2°F

Pcpn.

3.76’’

2.38’’

2.14’’

 

 Moon/Sun/Tide data for the month of January 2013   

Sunrise/sunset data, phase of the moon, as well as tide data can all be found by going to the climate portion of the National Weather Service San Juan Climate homepage and then clicking on the astronomical tab  


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