Guantánamo weather in September

In September, Guantánamo sees average daytime highs of 32°C and overnight lows near 23°C, with 137 mm of rain across 21.6 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Guantánamo's 11th-clearest and 12th-windiest month. For the whole year in context, see Guantánamo's year-round climate.

Daytime high
32°
4th warmest
Overnight low
23°
10th coldest
Rainfall
137 mm
21.6 wet days
Daylight
12 h 06 min
5:52 AM – 5:59 PM
Cloud cover
65%
11th clearest
Wind
6 km/h
12th windiest
Solar energy
5.74 kWh/m²
Travel score
3.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Guantánamo reaches about 32°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, September runs about 1°C cooler than August and about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63223
73223
83223
93223
103223
113223
123223
133223
143223
153223
163223
173223
183223
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123

How September really feels in Guantánamo

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Guantánamo weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°164.210.97.1
Feb29° / 19°163.611.36.8
Mar29° / 20°346.411.96.1
Apr30° / 21°589.712.45.2
May31° / 22°13917.212.94.0
Jun32° / 23°9916.713.23.4
Jul33° / 24°7716.713.13.2
Aug32° / 24°9818.412.73.1
Sep32° / 23°13721.612.13.1
Oct30° / 23°11718.711.53.9
Nov29° / 22°5810115.5
Dec28° / 20°265.210.86.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24555
34555
44555
54555
64555
74456
84555
94357
104258
114258
124258
134159
144159
154159
164060
173961
184060
194060
204159
214060
224060
233961
243961
253961
264060
273961
283961
294060
304060

Chance of precipitation in September

Any precipitation

Guantánamo gets around 137 mm of rain over 21.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 72% and peaks near 76% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
168
268
368
468
568
668
769
869
970
1070
1171
1272
1373
1474
1574
1675
1775
1875
1976
2076
2176
2275
2375
2474
2574
2673
2772
2871
2970
3069

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
13952
23952
33943
43943
53943
63943
73943
83943
93943
103943
112953
122953
132953
142953
152953
162953
172962
181972
191972
201972
211972
221972
232962
242962
252962
262962
272962
282962
292962
303952

Wind in September

Winds average 6 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 5:48 AM to 5:55 AM, and sunset from 6:13 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:486:13
212.45:496:12
312.45:496:11
412.35:496:10
512.35:496:09
612.35:506:08
712.35:506:07
812.35:506:06
912.35:506:05
1012.25:506:04
1112.25:516:03
1212.25:516:02
1312.25:516:01
1412.25:516:00
1512.15:526:00
1612.15:525:59
1712.15:525:58
1812.15:525:57
1912.15:525:56
2012.05:535:55
2112.05:535:54
2212.05:535:53
2312.05:535:52
2412.05:545:51
2511.95:545:50
2611.95:545:49
2711.95:545:48
2811.95:555:47
2911.95:555:46
3011.85:555:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.74 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 6.77 kWh/m² in July across the year — September's 5.74 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Intense
46.0Intense
56.0Bright
66.0Bright
76.0Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.6Bright
215.6Bright
225.6Bright
235.5Bright
245.5Bright
255.5Bright
265.4Bright
275.4Bright
285.4Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Guantánamo

In seasonPeak

In September, Guantánamo sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Guantánamo sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Guantánamo?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.1
Sightseeing
11th-best month of the year
4.7
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Guantánamo.

What to pack for Guantánamo in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Guantánamo sees daytime highs around 32°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Guantánamo in September

The nearest coast averages about 30°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 31 km away) is warmest in September at about 30°C and coldest in February near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May28Tropical
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Guantánamo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guantánamo peaks around June 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJun 16UV 12Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Very high
Nov7Very high
Dec7High

Air quality in Guantánamo in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Guantánamo is worst in June — around 23 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (December, 5 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2223 µg/m³Dec 195 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb6Good
Mar7Good
Apr9Good
May13Moderate
Jun23Moderate
Jul22Moderate
Aug18Moderate
Sep13Moderate
Oct11Good
Nov6Good
Dec5Good
Location & terrain

Where is Guantánamo?

Guantánamo sits at 20.1°N, 75.2°W, 56 m above sea level, in Cuba. The nearest listed city is Río Guayabal de Yateras, 32 km away.

MoaSantiago de CubaSan LuisBaracoaPalma SorianoCueto

Topography around Guantánamo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Guantánamo.

Within 3 km, the terrain around Guantánamo has only modest variations in elevation — a maximum elevation change of 63 m around an average of 52 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 734 m; within 80 km, large variations in elevation — a maximum elevation change of 1,196 m.

The land around Guantánamo is covered by artificial surfaces (37%), trees (31%) and grassland (20%) within 3 km, trees (45%) and grassland (30%) within 16 km, and trees (49%) and water (38%) within 80 km.

3 km
63 m
16 km
734 m
80 km
1,196 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Río Guayabal de Yateras 32 km · Sagua de Tánamo 49 km · Moa 63 km · Santiago de Cuba 65 km · San Luis 67 km · Baracoa 78 km · Palma Soriano 82 km · Cueto 94 km

Cuba travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C / L
110 V · 60 Hz
Prices
≈ 39% of US
price level, 2011
GDP per capita
$9,605
2020
Happiness
5.4 / 10
World Happiness, 2011
Homicide rate
4.5
per 100k, 2019
Road deaths
8.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 515
Religion
Christian 59%none 23%folk religion 18%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Guantánamo (20.1444°, -75.2092°, elevation 56 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).