Guantánamo climate

Name: Guantánamo
Address: CU

Guantánamo is warmest in July, with average highs of 34 °C, and coldest in February, when nights average 20 °C. September is the wettest month (138 mm) and January the driest (15 mm). Figures are 1991–2020 climate normals.

Across a full year Guantánamo averages 847 mm of rain and 364 days above 25 °C.

Cuba · population 272,801 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 34 °C
Coldest month February 20 °C
Driest month January 15 mm
Wettest month September 138 mm
Least cloud February 31 % cloud
Hottest on record July 39 °C
Coldest on record January 14 °C

What to expectGuantánamo through the year

Guantánamo has a clear annual cycle: average daily highs run from 30 °C in February to 34 °C in July, a swing of 4.5 °C in mean temperature across the year.

Counted across a normal year, 364 days a year reach 25 °C, 258 of them reach 30 °C. The warmest reading in the 1991–2020 record is 39 °C, in July.

Rain is strongly seasonal. September averages 138 mm against 15 mm in January — 9.4 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	29.5 °C	15 mm	37 %
February	30.2 °C	18 mm	31 %
March	30.5 °C	33 mm	35 %
April	31.2 °C	57 mm	40 %
May	31.3 °C	127 mm	56 %
June	32.4 °C	93 mm	65 %
July	33.9 °C	71 mm	52 %
August	33.6 °C	97 mm	58 %
September	32.3 °C	138 mm	64 %
October	31.0 °C	114 mm	63 %
November	30.1 °C	59 mm	51 %
December	29.6 °C	25 mm	41 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	29.5 °C	20.4 °C	24.3 °C	33.5 °C	13.6 °C	31	12
February	30.2 °C	20.2 °C	24.6 °C	34.7 °C	14.7 °C	28	16
March	30.5 °C	20.6 °C	25.0 °C	35.3 °C	15.2 °C	31	19
April	31.2 °C	21.7 °C	26.0 °C	36.2 °C	17.1 °C	30	22
May	31.3 °C	22.9 °C	26.6 °C	35.4 °C	17.3 °C	31	23
June	32.4 °C	24.0 °C	27.8 °C	38.3 °C	21.2 °C	30	27
July	33.9 °C	24.7 °C	28.8 °C	39.0 °C	22.0 °C	31	31
August	33.6 °C	24.7 °C	28.6 °C	38.3 °C	22.3 °C	31	30
September	32.3 °C	24.1 °C	27.7 °C	37.1 °C	21.3 °C	30	27
October	31.0 °C	23.4 °C	26.6 °C	36.1 °C	19.4 °C	31	22
November	30.1 °C	22.3 °C	25.6 °C	35.0 °C	16.2 °C	30	16
December	29.6 °C	21.1 °C	24.7 °C	34.0 °C	14.6 °C	31	13

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	15 mm	4	11 h/day	37 %	71 %	14 km/h
February	18 mm	4	11 h/day	31 %	69 %	14 km/h
March	33 mm	6	12 h/day	35 %	68 %	14 km/h
April	57 mm	10	13 h/day	40 %	69 %	13 km/h
May	127 mm	16	13 h/day	56 %	73 %	12 km/h
June	93 mm	15	13 h/day	65 %	73 %	11 km/h
July	71 mm	15	13 h/day	52 %	68 %	13 km/h
August	97 mm	17	13 h/day	58 %	71 %	12 km/h
September	138 mm	21	12 h/day	64 %	76 %	11 km/h
October	114 mm	18	12 h/day	63 %	79 %	11 km/h
November	59 mm	9	11 h/day	51 %	76 %	13 km/h
December	25 mm	5	11 h/day	41 %	74 %	14 km/h

How Guantánamo compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Guantánamo	34 °C	20 °C	847 mm	364
Santiago de Cuba · Cuba	32 °C	21 °C	789 mm	363
Holguín · Cuba	33 °C	20 °C	904 mm	353
Bayamo · Cuba	34 °C	19 °C	1,110 mm	361
Las Tunas · Cuba	33 °C	20 °C	1,049 mm	356
Port-de-Paix · Haiti	32 °C	22 °C	1,000 mm	360
Saint-Marc · Haiti	32 °C	22 °C	644 mm	365

Where Guantánamo ranks

Ranking	Position	Value
The warmest places in North America in November	8thof 50	30 °C
The warmest places in North America in December	10thof 50	30 °C
The warmest places in North America year-round	13thof 50	31 °C
The warmest places in North America in January	14thof 50	30 °C
The warmest places in North America in October	14thof 50	31 °C
The warmest places in North America in February	17thof 50	30 °C

Planning a trip? See the best time to visit Guantánamo.

QuestionsCommon questions about Guantánamo’s climate

When is the best time to visit Guantánamo?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, December sit closest to 20 °C on average, July is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Guantánamo get?

In July, the warmest month, daily highs average 34 °C. About 258 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average 20 °C in February, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Guantánamo?

September, averaging 138 mm over 21 days with rain. The driest month is January with 15 mm. The year as a whole averages 847 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Guantánamo rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.