Guantánamo climate — normals and trends
Guantánamo (Cuba) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.9 °C and it receives 903 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (27.1 °C on average) and the coldest is January (22.7 °C). Rainfall peaks in May.
Guantánamo averages 0 frost days, 197 hot days (≥ 30 °C) and 159 rainy days per year.
Guantánamo has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.7 °C (on 22 August 1987) and the coldest 10.6 °C (on 28 February 1968).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
GuantánamoGuantánamo Province
- coords
- 20.14°, -75.21°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.9°C
Average daily high
30.0°C
Average daily low
21.2°C
Annual rainfall
903mm
Sunshine / day
11.1h
Mean relative humidity
77%
Average peak wind
11.9km/h
Seasonal range
4.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
197 d/yr
Rainy days (≥ 1 mm)
159 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.5 °C
Average feels-like low
24.3 °C
Average peak gust
32.5 km/h
Tropical nights (≥ 20 °C)
268 d/yr
Solar radiation
20.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.58 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.7 °C
22 August 1987
Coldest day
10.6 °C
28 February 1968
Wettest day
199 mm
17 May 2017
Windiest day
67.4 km/h
29 October 2025
Strongest gust
140.4 km/h
29 October 2025
Hottest feels-like
42.2 °C
12 August 1987
Coldest feels-like
9.8 °C
28 February 1968
Sunniest day
13.1 h
15 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 28.7 °C | +0.8 °C | 5 mm | -14 mm |
| Feb | 29.1 °C | +0.7 °C | 10 mm | -13 mm |
| Mar | 29.6 °C | +0.3 °C | 32 mm | -4 mm |
| Apr | 29.3 °C | -0.7 °C | 72 mm | +8 mm |
| May | 31.7 °C | +1.3 °C | 38 mm | -96 mm |
| Jun | 31.9 °C | +0.6 °C | 63 mm | -54 mm |
| Jul | 32.1 °C | -0.3 °C | 66 mm | -11 mm |
| Aug | 33.1 °C | +0.8 °C | 66 mm | -35 mm |
| Sep | 31.8 °C | +0.4 °C | 239 mm | +111 mm |
| Oct | 29.5 °C | -0.5 °C | 280 mm | +152 mm |
| Nov | 29.7 °C | +0.8 °C | 35 mm | -18 mm |
| Dec | 29.0 °C | +1.0 °C | 19 mm | -5 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Guantánamo?
Guantánamo has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.9 °C and it receives 903 mm of precipitation per year.
What is the hottest day ever recorded in Guantánamo?
The hottest day measured in Guantánamo between 1940 and 2025 was 22 August 1987, reaching 36.7 °C.
What is the coldest day in Guantánamo?
The coldest day measured in Guantánamo between 1940 and 2025 was 28 February 1968, at 10.6 °C.
Does it snow in Guantánamo?
Almost never: Guantánamo sees virtually no snow, with about 0 frost days per year.
Has the climate of Guantánamo warmed?
Yes: Guantánamo warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guantánamo?
The wettest day measured in Guantánamo between 1940 and 2025 was 17 May 2017, with 199 mm of rain in 24 hours.
What was the windiest day in Guantánamo?
The windiest day measured in Guantánamo between 1940 and 2025 was 29 October 2025, with winds reaching 67.4 km/h.
What is the warmest month in Guantánamo?
The warmest month in Guantánamo is July (27.1 °C on average); the coldest is January (22.7 °C).
How much does it rain in Guantánamo?
Guantánamo receives on average 903 mm of precipitation per year, spread over about 159 rainy days.
Is it sunny in Guantánamo?
Guantánamo gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.
Are there tropical nights in Guantánamo?
Yes: Guantánamo has on average 268 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Guantánamo?
In Guantánamo, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 12 August 1987, and the lowest was 9.8 °C on 28 February 1968.
Compare Guantánamo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Guantánamo