January 2014 Climate Report for Puerto Rico and the U.S. Virgin Islands  

Synopsis

      Overall, January 2014 can be described as a dry and hot month with precipitation deficits and above normal temperatures across much of the local islands as a result of a persistent ridge pattern over the area. The scenario changed during the last week of the month when trofiness prevailed to the east of the area and induced scattered to locally numerous passing showers across windward areas as well as afternoon showers with isolated thunderstorms over western Puerto Rico. Statistically, the average maximum temperature at the Luis Muñoz Marin International Airport (TJSJ) in San Juan Puerto Rico was approximately 3.0ºF warmer than the 30-year average from the National Climate Data Center (NCDC).  The average temperature was below normal for 3% of the month; while above normal temperatures were observed 97% of the month. The average minimum temperature at TJSJ was 74.3 ºF, which is 2.3ºF above normal in respect to the 30 year average.

     Across the U.S. Virgin Islands, the mean temperature at Henry E. Rohlsen Airport (TISX) in Saint Croix and Cyril King Airport (TIST) in Saint Thomas was 79.0 and 79.3ºF, which is 0.8 and 0.5ºF above normal respectively.  In terms of precipitation, a rainfall total of 2.53 inches was reported at TJSJ, which is 1.23 inches below normal. January 2014 produced 21 days of measurable rain at TJSJ, which means 68% of days where 0.01 inch or more accumulated. Meanwhile, 18 and 21 days of measurable rain were reported at TIST and TISX, resulting in 58 and 68% of the days where 0.01 inch or more accumulated.

Rainfall Accumulation     

  

Figure A – Graphical Display of rainfall for January 2014 across Puerto Rico and the U.S. Virgin Islands. 

 

...preliminary data...   

Climate Division Monthly Rain Normal Rain PON Rain YTD Normal Rain PON
North Coastal  2.69  4.06 66% 2.69  4.06  66%
South Coastal  0.55 1.62 34%  0.55  1.62  34%
Northern Slopes 1.38 12.61  11% 1.38  12.61 11%
Southern Slopes  1.30  2.00 65%  1.30  2.00 65%
Eastern Interior  4.11  4.69 88%  4.11  4.69  88%
Western Interior 1.54 3.19 40%  1.54  3.19  40%
Saint Thomas & Saint John 0.62  2.72  57% 0.62  2.72  57%
Saint Croix  1.61 2.00  80% 1.61  2.00  80%

 Figure B – Tabular Display of rainfall per climate zones for January 2014 across Puerto Rico and the U.S. Virgin Islands derived from 52 COOP stations.

PON -Percent of Normal Rainfall YTD- Year to Date

Monthly Hydrologic Reports (E5/E3)

River and flood conditions as well as flood crest information can all be found by going to the hydrology portion of the National Weather Service San Juan homepage or clicking here.

Highlights for Primary Local Climatological Data Sites 

New Records for January 2014

San Juan

Date New Record Previous Record
Jan 18th  A high temperature of 91°F. This broke the old record of 89°F set back in 1964.
Jan 22nd A high temperature of 91 °F. This broke the old record of 87°F set back in 1998.
Jan 2014 Warmest January on record with an average temperature of 80.2°F. This broke the previous record of 79.8°F on January 1981.

Saint Thomas

Date New Record Previous Record
Jan 2014   8th warmest January on record with an average temperature of 79.3°F.  January 1994 continued to be the warmest January on record with an average temperature of 80.8°F.
Jan 2014   7th driest January on record with 1.02". January 2013 continued to be the driest January on record with 0.48".

Saint Croix

Date New Record Previous Record
 Jan 2014 7th warmest January on record with an average temperature of 79.0°F.  January 1973 continued to be the warmest January on record with an average temperature of 80.6°F.

January 2014 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 2014 Observations:

  San Juan Saint Thomas Saint Croix
High 86.2°F(+3.0°F ) 84.4°F(-0.7°F)
84.6°F(+0.6°F)
Low 74.3°F(+2.3°F ) 74.1°F(+1.6°F ) 73.3°F(+0.9°F)
Avg. T 80.2°F(+2.6°F ) 79.3°F(+0.5°F) 79.0°F(+0.8°F)
Pcpn. 2.54" (-1.22") 1.02" (-1.36") 1.13" (-1.01")

January 2014 Extremes:

  San Juan Saint Thomas Saint Croix
High 91°F January 22nd and 18th  86°F January 31st, 29th and 9th  87°F January 4th 
Low 72°F January 18th, 17th and 14th  70°F January 14th  68°F January 15th 

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 22nd 2014  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  61°F January 21st 2000 
62°F January 25th 1968  63°F January 8th 1956 61°F January 20th 2000 
62°F January 28th 1965  64°F January 20th 2000   61°F January 27th 1979 

Wettest Januarys:

San Juan Saint Thomas Saint Croix
15.47"  1937  4.83"   2006  7.35"   1963 
12.45" 1902 4.67"   1995 5.26"   2005 
11.07"  2010  4.19"   1956 4.77"   1952 

Driest Januarys:

San Juan Saint Thomas Saint Croix
 0.61"   1978 0.39"   2014   0.49"   2011
 0.69"   1983 0.48"   2013   0.54"   1977
 0.94"   1960 0.76"   2007  0.60"   2009 

Looking ahead toward the month of February

Normal Precipitation

(click on the image to enlarge)

 

  Normal Temperatures  

Maximum Temperatures Minimum Temperatures

Caribbean Climate Outlook for February-March-April (FMA) (click here to details) 

  FMA rainfall over the Caribbean islands is likely to be below-normal to normal in the NW, normal to above normal over the E Guianas and hardly predictable elsewhere.

Moon/Sun/Tide Data for the month of February 2014

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.

Click here to return to unique local climate data web page for the NWS San Juan


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