Average rainfall in puerto rico: Puerto Rico Climate, Weather By Month, Average Temperature (Puerto Rico)

PR and USVI Normals

San Juan, PR

Weather Forecast Office

Rainfall and Temperature Maps for Puerto Rico and U.S. Virgin Islands

 1991-2020  Monthly Normals 

Frequently Asked Questions

What are normals?

      In a general sense, a “normal” is the expected value (e. g., temperature, precipitation amount, etc.) for a particular location during a particular time of year.  Normals help describe a location’s climate by quantifying certain elements, such as precipitation seasonality.  For monthly and annual values, normals are typically the average values during the 30-year period.  Distinctly different from averages, daily normals (1991-2020) were computed using a harmonic fit, a statistical method which dampens the effects of outliers, creating a smooth transition between adjacent days.  

Why does NOAA produce normals?

      NOAA’s computation of climate normals is in accordance with the recommendation of the World Meteorological Organization (WMO), of which the United States is a member.  While the WMO mandates each member nation to compute 30-year averages of meteorological quantities at least every 30 years (1931-1960, 1961-1990, 1991-2020, etc.), the WMO recommends a decadal update, in part to incorporate newer weather stations.  

For what purposes are normals used?

      Meteorologists and climatologists regularly use normals for placing recent climate conditions into a historical context.  NOAA’s normals are commonly seen on local weather news segments for comparisons with the day’s weather conditions.  In addition to weather and climate comparisons, normals are utilized in seemingly countless applications across a variety of sectors.  These include:  regulation of power companies, energy load forecasting, crop selection and planting times, construction planning, building design, and many others.

Is our climate becoming warmer and wetter?

     The climate of a particular location changes over time, but climate normals were not designed to be metrics of climate change.  They may capture recent trends, giving a better perspective of the current state of the climate, but changes between sets of normals do not necessarily confirm a trend.   Because of the rigidity of the 30-year time period, a trend on shorter or longer time scales may not be represented. 

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

The climate of Puerto Rico: when to go to Puerto Rico

Home / Central America / Puerto Rico / The climate of Puerto Rico: when to go to Puerto Rico

in Puerto Rico

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The island of Puerto Rico enjoys a hot-humid tropical climate, with average annual temperatures of 26 ° C and rainfall well distributed throughout the year. The wettest period, however, coincides with the months from May to October. The rainiest month is August. The driest months are those between January and April.

Due to the influences from the Atlantic ocean, different weather conditions occur on the two sides of the island. The north coast is the rainiest on the island with 1,400 – 2,000 mm per year, while the south coast has an annual average rainfall of 1,000 mm. The southwest part is even drier, here there are on average about 400 mm of annual rainfall. In absolute, the mountains of the interior receive the greatest rainfall, between 3,000 and 4,000 mm per year. Hurricanes hit the island between August and November.

Temperatures are fairly mild. In general there are average values of maximum temperatures that vary between 29 ° C and 27 ° C throughout the year, while the average values of minimum temperatures vary between 21 ° C and 24 ° C.

The sea water temperature varies between 26 ° C in the months from January to March to 29 ° C in September and October.

WHEN TO GO TO PORTO RICO

The best time to visit Puerto Rico is the relatively dry season between December and May.

THE CLIMATE OF PUERTO RICO: CLIMATIC TABLES

SAN JUAN (3 meters)
Month	Average low (°C)	Average high (°C)	Precip. (mm)	Precip. days
January	22,2	28,4	95,5	17,6
February	22,2	28,7	60,7	13,9
March	22,7	29,4	49,5	12,2
April	23,6	30,1	118,9	13,3
May	24,6	30,8	149,9	15,7
June	25,4	31,6	112,0	14,4
July	25,6	31,5	128,8	18,6
August	25,7	31,8	138,7	18,5
September	25,4	31,8	146,6	17,4
October	24,9	31,3	142,0	17,7
November	24,0	29,9	161,3	19,6
December	23,0	28,8	127,5	19,6
YEAR	24,1	30,3	1431,3	198,5

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weather and climate for the Netherlands Antilles

The Netherlands Antilles are two groups of islands in the Caribbean that are 800 km apart. The southern group includes the islands of Curaçao and Bonaire, located next to Venezuela. The northern group consists of the islands of St. Eustatius, Saba and St. Maarten. They are the northernmost in the Lesser Antilles chain, southeast of Puerto Rico. The only land border with France, 10 km long, is located on the island of Saint Martin. The total area of ​​\u200b\u200bthe islands is 999 km ² . The southern islands are composed mostly of igneous rocks and are fringed by coral reefs. The northern islands are made up of volcanic rocks. An extinct volcano with a height of 887 m is the highest point located on the island of Saba. On the islands you can see a variety of flora and fauna. Bonaire is known for its flamingos. Curaçao has many reptiles including geckos, lizards and sea turtles. People come to the island of Saba to admire the pristine beauty, an abundance of wild flowers and a tropical forest with orchids and ferns that live in it. In the sea around the island you can see barracudas, sharks, sea turtles and coral gardens. nine1001 The climate on the islands is tropical. The air temperature fluctuates slightly throughout the year, averaging +26°C during the day and +20°C at night. In Curaçao and Bonaire, the hot weather is moderated by constant trade winds blowing to the northeast. The rainy season starts in October and ends in December, with an average annual rainfall of 570 mm. On the island of Saint Martin, the rainy season lasts from June to October, during this period hurricanes are also possible. On Sint Eustatius, the rainy season starts in June and ends in September, and the average annual rainfall is 1150 mm. The island of Saba is often covered with clouds, with an average annual rainfall of 1000 mm. The dry season lasts from December to July. With the choice of the best time for holidays in the Netherlands Antilles will help our weather calendar by months.

Weather on the islands in January

The average air temperature in January is +27°С. On the southern islands, 70-115 mm of precipitation falls in 14-18 days, and on the northern islands – 40-50 mm (in 13 days). Humidity is 81% on the southern islands and 77% on the northern ones. Water on the coast +26°С.

Weather on the islands in February

In February, the air temperature is +28°C. The southern islands receive 40-80 mm of precipitation in 9-12 rainy days, and in the north – 40 mm in 11 days. Water on the coast +26°С. Humidity reaches 82% on the southern islands and 77% on the northern ones. Weather on the islands in March
This month the air temperature remains unchanged at +28°С. Water in March warms up to +26°С. It rains 8-11 days a month, bringing 40-60 mm. Humidity in the southern islands is 82%, in the northern – 78%.

Weather on the islands in April

Air temperature rises to +29°Happy day. For 8 rainy days, 50-80 mm of precipitation falls on the southern islands, and on the northern islands, in 14 days, the rainfall reaches 60 mm. The water on the coast warms up to +26°C.

Weather on the islands in May

In May, the air temperature on the islands is +30°C. This month, 75-110 mm of precipitation falls on the southern islands for 11-13 rainy days, and the humidity level reaches 84%. The level of precipitation on the northern islands for 20 rainy days reaches 150-160 mm, and air humidity – up to 81%. By the end of May, the water off the coast warms up to +27°C. nine0003

Weather on the islands in June

The air temperature on the islands does not drop below +30°C during the day. The humidity level remains unchanged: 84% in the southern islands and 81% in the northern ones. During 13 rainy days, 50-75 mm of precipitation falls on the southern islands, and 15 rainy days and a rainfall of 105-110 mm are expected on the northern islands. The water near the coast is warmed up to +27°C.

Weather on the islands in July

The average daily air temperature in July is +30°С. For a month, 110-180 mm of precipitation falls in 15-17 rainy days on the southern islands, and on the northern islands – 22 rainy days will bring 160 mm of precipitation. Air humidity: 84% – in the southern and 80% – in the northern islands. Water temperature +27°С. nine0003

Weather on the islands in August

In August, the air temperature will rise to +31°C and the water temperature to +28°C. On the southern islands, 120-155 mm of precipitation falls in 19-20 days, and on the northern islands – 235 mm in 23 rainy days. Humidity ranges from 80% to 82%.

Weather on the islands in September

The average air temperature in September on the islands is +31°С. On the southern islands, 140-185 mm of precipitation falls in 15-17 rainy days, and on the northern islands – 150-165 mm in 21 days. Humidity is 82% in the southern islands and 79% – in the north. Water on the coast +29°С.

Weather on the islands in October

In October in the Netherlands Antilles, the average air temperature is +31°С, and the water near the coast is +29°С. This month, 120-130 mm of precipitation falls on the southern islands in 22-25 rainy days, and the humidity level reaches 81%. The level of precipitation on the northern islands for 20 rainy days reaches 155-175 mm, and air humidity – up to 78%.

Weather on the islands in November

In November, the air temperature remains unchanged: +31°С.