Climate and monthly weather forecastCayo Guillermo, Cuba

The climate of Cayo Guillermo

As a tropical location nestled in the archipelago off Cuba's north central coast, Cayo Guillermo is classified under the Köppen climate classification as a tropical monsoon climate. This distinct geographical position leads to a climate characterized by warm temperatures, high humidity, and significant rainfall throughout the year.

Upon examining the climatological data for Cayo Guillermo, it is apparent that temperatures remain relatively stable throughout the year, ranging from a low of 17°C (62.6°F) to a high of 33°C (91.4°F). The warmest month of the year typically falls between June and August with temperatures reaching a maximum of 33°C (91.4°F) while the coolest month is February with an average minimum temperature of 17°C (62.6°F).

In terms of rainfall, Cayo Guillermo sees an increase in the amount of precipitation from the start of May, peaking in the month of October with a hefty average of 182mm (7.17"). On the contrary, a drop in precipitation is noticeable from November with the least amount of rainfall recorded in December at 39mm (1.54").

Daylight hours present in a clear crescendo-decrescendo pattern across the year, peaking in June with 13.5 hours of daylight and sinking to its lowest in December with 10.8 hours. Sunshine hours see little variation, hovering around 7-9 hours throughout the year. Peak UV index is a notable characteristic of this climate, with values as high as 12 in the months from May to August.

The best time to visit Cayo Guillermo

Given the preference of most travelers for warm temperatures and dry conditions, the beneficial time to pay a visit to Cayo Guillermo is from November to April. During this period, average temperature ranges from 19°C (66.2°F) to 31°C (87.8°F), and the average amount of rainfall is relatively low, ranging from 39mm (1.54") to 60mm (2.36"), making it ideal for outdoor activities.

The worst time to visit Cayo Guillermo

Contrarily, the months from May to October might prove unfavorable for potential visitors. This time of year sees a dramatic surge in the precipitation levels, with rainfall amount reaching as much as 182mm (7.17") in October. Simultaneously, average temperatures rise, with a maximum of 33°C (91.4°F), which combined with the high humidity can lead to discomfort.

Spring weather in Cayo Guillermo

During the spring season stretching from March to May, the weather in Cayo Guillermo begins to heat up. Average high temperatures escalate from 29°C (84.2°F) in March up to 31°C (87.8°F) by May. This period also marks the start of the rainy season, with rainfall totals increasing dramatically from 52mm (2.05") in March to 168mm (6.61") in May.

Summer weather in Cayo Guillermo

The summer months from June to August are characterized by intense heat and heavy rainfall in Cayo Guillermo. Average high temperatures oscillate around 33°C (91.4°F) while minimums remain steady at 23°C (73.4°F). Rainfall is significant during these months, hitting a peak of 160mm (6.3") in June.

Autumn weather in Cayo Guillermo

Cayo Guillermo experiences a transition in climate in the autumn months of September, October, and November. Despite a slight reduction in temperature, with highs of 31°C (87.8°F) and lows of 22°C (71.6°F), rainfall increases substantially. The peak of the rainy season occurs in October with an average rainfall of 182mm (7.17").

Winter weather in Cayo Guillermo

Winter, spanning December through February, brings relief from the heat for Cayo Guillermo. Lower yet comfortable temperatures ranging from 17°C (62.6°F) to 29°C (84.2°F) can be expected, providing a respite from the grueling summer heat. Correspondingly, rainfall significantly drops off during these months with an average of just 43mm (1.69") in February.

Weather in January

Initiating the year, January in Cayo Guillermo, Cuba, presents relatively moderate weather conditions. Temperatures typically range from a comfortable 17°C (62.6°F) to a warm 27°C (80.6°F). The beginning of the year is characterized by moderate daylight exposure of 10.9 hours, bringing ample opportunities for outdoor recreation in the sun-kissed landscapes of Cuba. Weather in January »

Weather in February

In Cayo Guillermo, the weather in February is quite similar to that of the preceding month. Weather-wise, an increment can be observed in certain elements, including temperature and daylight hours. Interestingly, the UV index elevates from a moderate 7 to a notably higher 8, signifying the need for increased sun protection measures. Weather in February »

Weather in March

By the time March arrives in Cayo Guillermo, the island starts to welcome spring with a variation in weather patterns. A notable increase in rainfall, reaching up to 52mm (2.05") this month, brings forth the onset of a wetter period in this tropical paradise. Weather in March »

Weather in April

Entering April, Cayo Guillermo witnesses further weather changes, characterized by greater rainfall and steadily climbing temperatures. Displaying a noticeable leap from the previous month, rainfall in April average at 60mm (2.36"), marking the commencement of the wet season. Weather in April »

Weather in May

Mingling the last fragments of spring with the onset of summer, May sets a differing tone weather-wise in Cayo Guillermo. Now reaching its peak, rainfall hits 168mm (6.61"), the highest level of precipitation thus far in the year. Prolonged daylight hours and a high UV index continue to define the daytime climate. Weather in May »

Weather in June

As the maiden month of summer, June carries the brunt of the season's heat in Cayo Guillermo. Keeping up with the intensified weather patterns, the UV index reaches a maximum of 12, a feature that highlights June and the following three months. Weather in June »

Weather in July

As one of the peak summer months, July in Cayo Guillermo is characterized by intense humidity and scorching temperatures which reach up to 33°C (91.4°F), the highest of the year. Adding to this, a significant UV index of 12 leaves no room for complacency when it comes to sun protection. Weather in July »

Weather in August

In Cayo Guillermo, August continues the established pattern of scorching hot and wet summer weather. With temperatures mirroring those of July, one can feel the relentless tropical heat of the Cuban shoreline. Rainfall, however, shows a rising trend, peakingto 117mm (4.61"), noteworthy after the little dip in July. Weather in August »

Weather in September

As September dawns on Cayo Guillermo, a marked shift in weather patterns begins to unfold. While the temperatures of 33°C (91.4°F) to 22°C (71.6°F) still represent a warm climate, the rainfall reaches a pinnacle at 160mm (6.3"). Weather in September »

Weather in October

October symbolizes the culmination of the rainy season in Cayo Guillermo, with a high of 182mm (7.17") of downpour. Despite this rainfall, sea temperatures persevere at a warm 29°C (84.2°F), barely scathed by the wet weather. Weather in October »

Weather in November

November strikes a balance between autumnal coolness and fading summer heat in Cayo Guillermo. A statistic that justifies this claim is the drastic drop in rainfall to 86mm (3.39"), indicating the retreat of the wet season. While daylight hours decrease, the duration of sunshine remains constant, portraying the uniqueness of November's weather. Weather in November »

Weather in December

As the curtain closes on the year in Cayo Guillermo comes December, featuring mild weather as winter takes hold. Reigning over weather statistics for this month are lower rainfall levels at 39mm (1.54"), substantiating the arrival of the dry season. Weather in December »