Guantánamo climate
Guantánamo (Cuba) has a hot semi-arid climate (Köppen BSh). The average temperature over the year is 27 °C81 °F, and about 571 mm22 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Guantánamo climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2883 | 2272 | 2578 | 210.8 |
| Feb | 2984 | 2272 | 2678 | 160.6 |
| Mar | 3085 | 2373 | 2679 | 190.8 |
| Apr | 3187 | 2475 | 2781 | 291.1 |
| May | 3187 | 2577 | 2882 | 622.4 |
| Jun | 3188 | 2679 | 2983 | 612.4 |
| Jul | 3189 | 2679 | 2984 | 371.4 |
| Aug | 3289 | 2680 | 2984 | 441.7 |
| Sep | 3289 | 2679 | 2984 | 652.6 |
| Oct | 3086 | 2678 | 2882 | 1265.0 |
| Nov | 2985 | 2475 | 2780 | 632.5 |
| Dec | 2984 | 2374 | 2679 | 281.1 |
| Year | 3289 | 2272 | 2781 | 57122 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 73% | 36% | 4.2 | 11:02 |
| Feb | 71% | 31% | 5.0 | 11:28 |
| Mar | 68% | 35% | 5.6 | 11:59 |
| Apr | 68% | 38% | 6.0 | 12:35 |
| May | 71% | 53% | 5.7 | 13:05 |
| Jun | 73% | 54% | 5.9 | 13:21 |
| Jul | 73% | 45% | 6.1 | 13:14 |
| Aug | 73% | 47% | 5.9 | 12:49 |
| Sep | 73% | 53% | 5.4 | 12:14 |
| Oct | 78% | 55% | 4.6 | 11:39 |
| Nov | 76% | 45% | 4.1 | 11:09 |
| Dec | 75% | 35% | 4.0 | 10:55 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Guantánamo is like
The warmest month is August, with an average high of 32 °C89 °F and a low of 26 °C80 °F. The coldest is January, when highs average 28 °C83 °F and lows 22 °C72 °F. Seasonal differences are small — just 3.7 °C6.7 °F between the warmest and the coolest month.
Annual precipitation is moderate at about 571 mm22 in. The wettest three-month stretch is September–November, which brings 45% of the annual total. Months with less than 20 mm0.8 in on average: February and March. The wettest month is October (126 mm5.0 in), the driest is February (16 mm0.6 in).
Relative humidity ranges from 68% in March to 78% in October. The clearest skies (lowest average cloud amount, 31%) are typical of February. Average wind speed near the ground ranges from 10 km/h (6 mph) in September to 15 km/h (9 mph) in December. Daylight lasts from about 10.9 hours in December to 13.3 hours in June.
Best time to visit Guantánamo
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–March: average highs of 28 °C83 °F to 30 °C85 °F with 16 mm0.6 in to 63 mm2.5 in of precipitation per month.
The most challenging month is October, which is hot, with average highs of 30 °C86 °F and humid (78% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Guantánamo
- Wetter months (May and June, September–November) — highs 2985 to 32 °C89 °F, lows 2475 to 26 °C79 °F, about 76 mm3.0 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Drier months (December–April, July and August) — highs 2883 to 32 °C89 °F, lows 2272 to 26 °C80 °F, about 28 mm1.1 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Guantánamo compares
Compared with Santiago de Cuba, about 65 km to the west, Guantánamo has practically the same average temperature and receives 25% more precipitation (571 mm22 in vs 457 mm18 in).
Of the 15 places in Cuba covered by World Climates, Guantánamo is the 4th warmest by annual mean temperature and the 11th wettest by annual precipitation. See all of them on the Cuba climate page.
Places in other countries with the most similar temperature and rainfall pattern: Saint-Marc (Haiti, BSh), Gustavia (Saint Barthelemy, BSh) and Road Town (British Virgin Islands, BSh).
Nearby places
- Santiago de Cuba 65 km · 28 °C82 °F · 457 mm18 in
- Palma Soriano 82 km · 27 °C80 °F · 462 mm18 in
- Holguín 137 km · 26 °C79 °F · 747 mm29 in
- Bayamo 152 km · 27 °C81 °F · 629 mm25 in
- Manzanillo 200 km · 28 °C82 °F · 629 mm25 in
- Las Tunas 203 km · 27 °C80 °F · 802 mm32 in
- Port-de-Paix 250 km · 27 °C81 °F · 700 mm28 in
- Les Cayes 266 km · 28 °C82 °F · 797 mm31 in
Frequently asked questions
What is the warmest month in Guantánamo?
August is the warmest month in Guantánamo, with an average high of 32 °C (89 °F) and an average low of 26 °C (80 °F).
What is the coldest month in Guantánamo?
January is the coldest month, with an average high of 28 °C (83 °F) and an average low of 22 °C (72 °F).
When does it rain the most in Guantánamo?
October is the wettest month with about 126 mm (5.0 in) of precipitation; February is the driest with about 16 mm (0.6 in).
What is the best time to visit Guantánamo?
Judging by long-term averages, the most comfortable months are November–March.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 117 m, while Guantánamo lies at about 56 m. Temperatures on this page were therefore adjusted by +0.4 °C0.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.