Climate and monthly weather forecast
Culebra, PR

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The climate of Culebra

Culebra is located in Puerto Rico, USA and is characterized by the Köppen climate classification as a Tropical Monsoon region (Am). This classification implies that the climate is predominantly hot and humid year-round. Across the twelve-month stretch, Culebra's climate exhibits minor fluctuations in its weather parameters.

The highest temperature recorded throughout the year is 84°F (28.9°C) in September while the lowest is around 75.7°F (24.3°C) in March. These temperatures manifest a significant consistency in the rate of warmth, indicative of the tropical monsoon imprint. Relative humidity hovers around the 75% to 78% range, presenting a generally humid environment. Rainfall levels show more variance with the maximum recorded rainfall being 4.45" (113mm) in September and the least at 1.22" (31mm) in February. During the year, the island experiences rainfall on an average of 18 to 25 days per month.

One distinct weather pattern to note is that the months from August to November receive the highest amount of rainfall, exceeding 4" (102mm). This indicates the presence of a more pronounced monsoonal impact during these months. Similarly, the highest sea temperatures are also experienced during the same period. The wind speeds also increase during the mid-year months to about 15mph (24.1km/h).

The best time to visit Culebra

The optimal time to visit Culebra would be when the weather conditions are relatively dry and temperate. While conditions remain tropical and warm throughout the year, a notable period of lesser rainfall occurs from February to April. The rainfall during these months fluctuates between 1.22" (31mm) to 1.5" (38mm). Moreover, sea temperatures remain warm, approximately 78.7°F (25.9°C) to 80.5°F (26.9°C), conducive for water-related activities. Sunshine hours are also relatively high during this period, making outdoor exploration and leisure more pleasurable.

The worst time to visit Culebra

The period from August to November cannot be recommended as the best time to visit Culebra. The weather during these months is characterized by the highest rainfall measurements, in the range of 4.21" (107mm) to 4.45" (113mm), paired with increased wind speeds. These factors might compromise outdoor activities and overall enjoyment of the island's offerings. Therefore, potential visitors are advised to consider other months for their trip to Culebra.

Spring weather in Culebra

During the spring months in Culebra, from March to May, temperatures remain warm with lows around 75.7°F (24.3°C) in March to a high of 81.1°F (27.3°C) in May. The rainfall during this period shows a gradual increase from 1.85" (47mm) in March to 3.03" (77mm) in May. However, the number of rainfall days doesn't see a similar increase, indicating sporadic and possibly heavier showers. The spring also brings in more hours of daylight, in the range of 12.1 hours to 13 hours, and sunshine lasting 8.5 hours to 10.3 hours.

Summer weather in Culebra

Culebra's summer from June to August presents the highest temperatures of the year. The warmth escalates from 82.6°F (28.1°C) in June to 84°F (28.9°C) in August. Humidity remains almost constant at 78% while the island receives increased rainfall, particularly in August at 4.21" (107mm). Wind speeds are noticeably higher and the number of sunshine hours begins to decrease. Despite some showers, this period is characterized by pleasantly warm sea temperatures from 83°F (28.3°C) to 84.5°F (29.2°C).

Autumn weather in Culebra

Autumn, covering September to November, is marked by a highest round-the-year temperature of 84°F (28.9°C) in September, after which it gradually starts to descend. Rainfall is at its peak during this season with September and October both witnessing rainfall over 4" (102mm). The sea temperatures remain relatively high, approximately in the mid 80s°F, but the hours of sunshine decrease significantly, making this season less vibrant.

Winter weather in Culebra

Winter in Culebra (December through February) is still relatively warm, owing to the island's tropical monsoon climate. Temperatures remain in the range of 79.2°F (26.2°C) to 80.6°F (27°C). Rainfall decreases drastically compared to Autumn months, with February reporting the lowest rainfall of 1.22" (31mm). Winter also brings fewer sunlight hours, but the weather remains pleasant and favorable for a winter getaway. Sea temperatures continue to be on the warmer side from 79.6°F (26.4°C) to 81.5°F (27.5°C) throughout the winter months. The winter winds are much calmer, enhancing the comfort of the season.

Weather in January

The weather in Culebra, Puerto Rico, USA, commences the year with noticeable stability. January experiences somewhat high humidity, making the days feel hotter. The sea temperature lingers close to the average land temperature, offering a pleasant beach experience. Weather in January »

Weather in February

February is akin to January but with slight improvements. The lower land temperature, compared to sea temperature, makes outdoor activities more engaging. Days tend to be longer with more daylight hours, creating better visibility for various indoor adventures. Weather in February »

Weather in March

Transitioning from February, March sees a decline in land temperatures whereas the sea temperatures register a mild increase. Diverse aquatic life can be experienced with warmer sea temperature making water sports more enjoyable. Weather in March »

Weather in April

Culebra weather in April witnesses a rise in both land and sea temperatures. Such increases make for warm evenings and prime conditions for late-night beach walks. As temperatures rise, so does the humidity, resulting in the occasional heavier rainfall of 1.5" (38mm) during this month. Weather in April »

Weather in May

May introduces significant changes to Culebra weather. The temperatures register an upward trend, paramount in announcing the onset of summer. A spike in humidity and rainfall to 3.03" (77mm) during May hints at the refreshingly wet season. Weather in May »

Weather in June

The Culebra weather in June is characterized by a further rise in temperatures and higher humidity levels. However, the windy conditions ease, allowing for quiet afternoons and evenings. Rainfall quantifies to 2.05" (52mm), distributed evenly over an average of 18.2 days. Weather in June »

Weather in July

Culebra's weather in July continues to intensify. With the hottest temperature of 82.9°F (28.3°C) and rainfall totalling 2.91" (74mm) spread over 21.7 days, it is a warm and wet month. Despite increasing cloud cover, there's plenty of sunshine to keep things exciting. Weather in July »

Weather in August

In August, Culebra weather is humid and warm, reaching its peak temperature of 83.7°F (28.7°C). The sea temperature also escalates to 84.5°F (29.2°C), encouraging aquatic activities among tourists. The increasing rainfall of 4.21" (107mm) over this month nourishes the thriving vegetation on the island. Weather in August »

Weather in September

Entering September, Culebra sees a slow decline in land temperatures. Meanwhile, rainfall increases to a significant 4.45" (113mm), making this month the wettest of the year. Despite lesser daylight, outdoor activities are still popular among the inhabitants and visitors. Weather in September »

Weather in October

In October, Culebra, Puerto Rico, USA, experiences further reductions in temperatures. The decline in daylight hours indicates the approaching winter season. The extended rainy period, with 4.37" (111mm) of rainfall over 23.6 days, breathes life into the island's flora. Weather in October »

Weather in November

The sudden drop in sea temperature, from 84.6°F (29.2°C) to 83.6°F (28.7°C), in November anticipates the arrival of the cold season in Culebra. The combination of high humidity and cooling temperatures makes for comfortable evenings. Weather in November »

Weather in December

December welcomes cooler days in Culebra, as both land and sea experience consistent drops in temperatures. Despite the overall decrease, the temperature remains higher than the yearly average, maintaining the island's tropical feel during the holiday season. Weather in December »
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the least humid months?

The months with the lowest humidity are January through March, October through December, with an average relative humidity of 75%.

How many days does it rain?

Throughout the year, there are 253.1 rainfall days, and 33.27" (845mm) of precipitation is accumulated.

What are the months with the highest UV index?

January through December, with an average maximum UV index of 7, are months with the highest UV index.

When is the lowest UV index?

January through December, with an average maximum UV index of 7, are months with the lowest UV index.

What is the driest month?

February is the month with the least rainfall in Culebra. Rain falls for 18.2 days and accumulates 1.22" (31mm) of precipitation.

What month is the ocean coldest in Culebra?

With an average ocean temperature of 78.6°F (25.9°C), February is the month with the coldest seawater.

What month is the coldest?

In Culebra, March is the month with the lowest recorded average temperatures, measuring a high of 78.4°F (25.8°C) and a low of 75.7°F (24.3°C).

What are the most humid months in Culebra?

The months with the highest humidity are May through August, with an average relative humidity of 78%.

When are the longest days?

June has the longest days of the year, with an average of 13h and 12min of daylight.

What month has the most sunshine?

With an average of 10.5h of sunshine, June has the most sunshine of the year.

What month is the hottest?

September, characterized by an average high temperature of 84°F (28.9°C) and a low temperature of 81.3°F (27.4°C), is generally the warmest month.

What is the wettest month?

September is the month with the most rainfall. Rain falls for 22.2 days and accumulates 4.45" (113mm) of precipitation.

What is the month with the warmest ocean?

With an average ocean temperature of 84.9°F (29.4°C), September is the month with the warmest seawater.

What are the months with the least sunshine?

November and December, with an average of 6.5h of sunshine, are months with the least sunshine.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 11h and 6min of daylight.

Is there Daylight Saving Time (DST)?

Culebra does not utilize Daylight Saving Time (DST). AST timezone is used over the entire year.

Average temperature
Culebra, PR

Average temperature - Culebra, PR

The warmest month (with the highest average high temperature) is September (84°F).
The month with the lowest average high temperature is March (78.4°F).

The month with the highest average low temperature is October (81.5°F).
The coldest month (with the lowest average low temperature) is March (75.7°F).

Average pressure
Culebra, PR

Average pressure - Culebra, PR

The months with the highest atmospheric pressure are January and February (30.02"Hg).
The months with the lowest atmospheric pressure are October and November (29.91"Hg).

Average wind speed
Culebra, PR

Average wind speed - Culebra, PR

The windiest month (with the highest average wind speed) is July (15mph).
The calmest month (with the lowest average wind speed) is October (11.1mph).

Average humidity
Culebra, PR

Average humidity - Culebra, PR

The months with the highest relative humidity are May, June, July and August (78%).
The months with the lowest relative humidity are January, February, March, October, November and December (75%).

Average rainfall
Culebra, PR

Average rainfall - Culebra, PR

The wettest month (with the highest rainfall) is September (4.45").
The driest month (with the least rainfall) is February (1.22").

Average rainfall days
Culebra, PR

Average rainfall days - Culebra, PR

The month with the highest number of rainy days is November (25.5 days).
The months with the least rainy days are February, March and June (18.2 days).

Average sea temperature
Culebra, PR

Average sea temperature - Culebra, PR

The best month for swimming (with the highest average sea temperature) is September (84.9°F).
The coldest month (with the lowest average sea temperature) is February (78.7°F).

Average daylight / Average sunshine
Culebra, PR

Average daylight / Average sunshine - Culebra, PR

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).

Average sunshine days
Culebra, PR

Average sunshine days - Culebra, PR

The months with the most sunshine days are March and April (7.3 days).
The month with the least sunshine days is November (2.4 days).

Average UV index
Culebra, PR

Average UV index - Culebra, PR

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average visibility
Culebra, PR

Average visibility - Culebra, PR

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Culebra, Puerto Rico, USA

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