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

January 2012 Highlights

New Records for January 2012

Saint Thomas

Date

New Record

Old Record

  January 10th

A record low temperature of 68°F. 

This breaks the old record of 69°F set in 2008.   

Saint Croix 

Date

New Record

Old Record

 January 18th

A record daily maximum rainfall of 0.71". 

 This breaks the old record of 0.33".

 January 2012

 11th wettest January on record.

January 1963 ended as the wettest January on record with a rainfall total of 7.35". 

 

Other notable temperatures and precipitation amounts

Notable January 2012 High's

Notable January 2012 Low's

91°F   Jan. 7th   Gurabo AES 

 48°F   Jan. 5th and 12th   Adjuntas AES

 90°F   Jan. 4th and 22nd   Ponce 4E

 51°F   Jan. 14th   Adjuntas AES  

90°F   Jan. 16th   Lajas AES

50°F   Jan. 22nd   Adjuntas AES

 

Puerto Rico

U.S. Virgin Islands

      Highest 24 hr Precip Total

    2.70"   Jan. 10th  Dos Bocas 

       0.71"   Jan. 18th  Christiansted Airport

Highest Weekly Rainfall Accum.

3.74"   Jan. 7th-13th  Dos Bocas   

 1.12"   Jan. 14th-20th  Christiansted Airport  

January 2012 Statistics

 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’’

  January 2012 Observations:

 

San Juan

Saint Thomas

Saint Croix

High

82.6°F(-0.6°F)

81.3 °F(-3.8°F)

80.5°F(-3.5°F)

Low

 71.9°F(-0.1°F)

70.3 °F(-2.2°F)

68.9°F(-3.5°F)

Avg. T

 77.3°F(-0.3°F)

75.8°F(-3.0°F)

74.8°F(-3.4°F)

Pcpn.

3.73"(-0.03")

1.99"(-0.39")

3.03"(+0.89")

 January 2012 extremes:

 

San Juan

Saint Thomas

Saint Croix

High

 85°F January 13th and 8th

 84°F January 31st, 28th and 27th

84°F January 1st and 2nd 

Low

69°F January 19th 

 67°F January 22nd, 21st and 12th

 65°F January 12th

Monthly Summary 

     A generally fair and mainly dry weather pattern prevailed across the local islands during January 2012, which is climatologically typical for this time of the year. Passing showers embedded in the trades ruled the entire month, producing some cloudiness and light rainfall amounts. This pattern of limited low level moisture and stable conditions helped to suppress significant afternoon convection even across the favored areas of western Puerto Rico.

Rainfall Accumulations Year to Date (YTD)    

 

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

 

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

Sector
Rain
Normal
PON

 

 
 
X North Coast
3.87
3.31
117%
X South Coast
1.00
0.98
102%
X North Slopes
2.70
2.95
90%
X South Slopes
1.45
2.00
73%
X East Interior
3.50
4.31
81%
X West Interior
3.10
2.95
105%
Puerto Rico Average
2.60
2.75
98%
X U.S. Virgin Islands
2.73
1.97
138%

 Figure C – Display of YTD precipitation by climate sectors derived from rain gage data.

Coloso Rincon Calero Camp Isabella AES Mora Camp Borinquen Airport Guajataca Dam Arecibo Observatory Dos Bocas Manati 2E Palmarejo Morovis Corozal AES Negro Corozal Toa Baja Levittown Charlotte Amalie Wintberg Redhook Bay Cruz Bay Coral Bay East Hill Montpellier Beth Upper New Works Fort Christiansted Christiansted Airport East End Rio Piedras AES Trujillo Alto LMM Airport Canovanas Palma Sola Roosevelt Roads Paraiso Rio Blanco Lower Juncos Gurabo AES San Lorenzo Jajome Alto Aguirre Santa Isabel Aibonito Guayama Ponce 4E Juana Diaz Camp Boca Ensenada Magueyes Island Lajas AES Santa Rita Yauco Sabana Grande Hacienda Constanza Mayaguez City Maricao 2 SSW Maricao Fish Hatchery Adjuntas AES Adjuntas 1 NW Corral Viejo Penuelas Cacaos Orocovis Cerro Maravilla Villalba Aceituna Toro Negro Forest

 January Historical Statistics              

Highest January Temperatures on record:

San Juan

Saint Thomas

Saint Croix

92°F January 16th 1983 93°F January 5th 1996 92°F January 30th 1973 
92°F January 11th 1982  93°F January 3rd 1996  91°F January 14th 1973 
91°F January 21st 1995  92°F January 13th 1996  90°F January 26th 1973

Lowest January Temperatures on record: 

San Juan

Saint Thomas

Saint Croix

 61°F January 31st 1962 63°F January 29th 1996  62 °F January 18th 1981 
62°F January 25th 1968  63°F January 8th 1956  62°F January 18th 1980 
 62°F January 28th 1965 64°F January 20th 2000  62°F January 20th 1979 

Wettest Januarys: 

San Juan

Saint Thomas

Saint Croix

15.47" January 1937 4.83" January 2006 7.35" January 1963
12.45" January 1902 4.67" January 1995 5.26" January 2005
11.07" January 2010 4.19" January 1956 4.77" January 1952

Driest Januarys: 

San Juan

Saint Thomas

Saint Croix

0.61" January 1978 0.76" January 2007 0.49" January 2011
0.69" January 1983 0.82" January 1991 0.54" January 1977
0.94" January 1960 0.87" January 1976 0.60" January 2009

Decadal January Observations for San Juan, Puerto Rico

 

2010-2012

2000’s

1990’s

1980’s

1970’s

1960’s

High

83.2°F

82.5°F

83.6°F

84.1°F

83.0°F

82.7°F

Low

71.9°F

71.2°F

71.3°F

70.7°F

72.0°F

69.3°F

Avg. T

77.5°F

76.8°F

77.4°F

77.4°F

77.5°F

76.0°F

Pcpn.

5.37"

3.90’’

4.09’’

2.34’’

2.68’’

3.05’’

Looking ahead toward the month of February

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

 

 

San Juan

Saint Thomas

Saint Croix

High

83.7°F

85.1°F

84.0°F

Low

72.0°F

72.5°F

72.3°F

Avg. T

77.9°F

78.8°F

78.2°F

Pcpn.

2.39’’

1.43’’

1.65’’

 

 Moon/Sun/Tide Data for the Month of February 2012   

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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