| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 29.7° | 20.2° | 17.6mm | 2.8 | 84 |
| February | 29.9° | 20.2° | 26.5mm | 2.3 | 84 |
| March | 30.2° | 21° | 59.9mm | 6.2 | 75 |
| April | 30.8° | 22.3° | 39.4mm | 3.6 | 78 |
| May | 31.4° | 23.5° | 75mm | 6.9 | 69 |
| June | 32.3° | 24.4° | 50.1mm | 5.8 | 67 |
| July | 33.3° | 24.8° | 57.6mm | 5.1 | 65 |
| August | 33.3° | 24.9° | 70.3mm | 6.3 | 62 |
| September | 32.8° | 24.3° | 127.1mm | 9 | 59 |
| October | 31.9° | 23.8° | 173.3mm | 11 | 58 |
| November | 31.2° | 22.5° | 60.2mm | 5.3 | 73 |
| December | 30.6° | 21.1° | 24.4mm | 3.4 | 79 |
January in Guantánamo averages a daily high of 29.7°C with nights around 20.2°C. Rain is rare — about 2.8 wet days and 17.6mm across the month. Comfortable conditions for being outdoors all day.
February in Guantánamo averages a daily high of 29.9°C with nights around 20.2°C. Rain is rare — about 2.3 wet days and 26.5mm across the month. Comfortable conditions for being outdoors all day.
March in Guantánamo averages a daily high of 30.2°C with nights around 21°C. Expect roughly 6.2 wet days totalling 59.9mm. Comfortable conditions for being outdoors all day.
April in Guantánamo averages a daily high of 30.8°C with nights around 22.3°C. Expect roughly 3.6 wet days totalling 39.4mm. Comfortable conditions for being outdoors all day.
May in Guantánamo averages a daily high of 31.4°C with nights around 23.5°C. Expect roughly 6.9 wet days totalling 75mm. Generally workable, with some weather to plan around.
June in Guantánamo averages a daily high of 32.3°C with nights around 24.4°C. Expect roughly 5.8 wet days totalling 50.1mm. Generally workable, with some weather to plan around.
July in Guantánamo averages a daily high of 33.3°C with nights around 24.8°C. Expect roughly 5.1 wet days totalling 57.6mm. Generally workable, with some weather to plan around.
August in Guantánamo averages a daily high of 33.3°C with nights around 24.9°C. Expect roughly 6.3 wet days totalling 70.3mm. Generally workable, with some weather to plan around.
September in Guantánamo averages a daily high of 32.8°C with nights around 24.3°C. Expect roughly 9 wet days totalling 127.1mm. Generally workable, with some weather to plan around.
October in Guantánamo averages a daily high of 31.9°C with nights around 23.8°C. Expect roughly 11 wet days totalling 173.3mm. Generally workable, with some weather to plan around.
November in Guantánamo averages a daily high of 31.2°C with nights around 22.5°C. Expect roughly 5.3 wet days totalling 60.2mm. Generally workable, with some weather to plan around.
December in Guantánamo averages a daily high of 30.6°C with nights around 21.1°C. Expect roughly 3.4 wet days totalling 24.4mm. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Guantánamo peaks at 84.
Based on 30 years of records, December–February scores highest for comfort in Guantánamo, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 33.3°C.
October is the wettest, averaging 173.3mm of rain across roughly 11 wet days.
January is the coolest month, with average daily highs around 29.7°C.