Basse-Terre weather in September

In September, Basse-Terre sees average daytime highs of 28°C and overnight lows near 26°C, with 107 mm of rain across 18.1 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Basse-Terre's 12th-clearest and 11th-windiest month. For the whole year in context, see Basse-Terre's year-round climate.

Daytime high
28°
1st warmest
Overnight low
26°
12th coldest
Rainfall
107 mm
18.1 wet days
Daylight
12 h 06 min
5:59 AM – 6:04 PM
Cloud cover
63%
12th clearest
Wind
15 km/h
11th windiest
Solar energy
6.02 kWh/m²
Travel score
4.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Basse-Terre reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826

Basse-Terre weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 24°3011.911.26.9
Feb25° / 24°229.111.57.2
Mar26° / 24°197.211.97.5
Apr26° / 24°309.612.36.9
May27° / 25°5011.512.76.3
Jun28° / 26°4512.412.96.0
Jul28° / 26°6215.912.95.7
Aug28° / 26°7917.812.55.3
Sep28° / 26°10718.112.14.9
Oct28° / 26°10819.511.65.1
Nov27° / 25°8716.311.35.7
Dec26° / 25°4013.511.16.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35248
45248
55248
65149
75050
84951
94852
104852
114753
124654
134456
144456
154456
164357
174258
184258
194258
204258
214258
224258
234258
244258
254258
264357
274357
284357
294357
304357

Chance of precipitation in September

Any precipitation

Basse-Terre gets around 107 mm of rain over 18.1 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 61% and peaks near 65% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
155
255
355
455
555
656
757
858
959
1060
1161
1262
1363
1463
1564
1664
1765
1865
1965
2064
2164
2264
2364
2463
2563
2663
2763
2863
2963
3063

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 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
17030
27030
37030
46931
56931
66931
76931
86931
96931
106931
117030
127030
137030
147030
157129
167129
177129
187228
197228
207327
217327
227426
237426
247426
257525
267525
277624
287624
297624
307723

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:57 AM to 6:00 AM, and sunset from 6:16 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:576:16
212.35:576:15
312.35:576:15
412.35:576:14
512.35:586:13
612.25:586:12
712.25:586:11
812.25:586:11
912.25:586:10
1012.25:586:09
1112.25:586:08
1212.15:586:07
1312.15:586:06
1412.15:586:06
1512.15:596:05
1612.15:596:04
1712.15:596:03
1812.15:596:02
1912.05:596:01
2012.05:596:01
2112.05:596:00
2212.05:595:59
2312.05:595:58
2412.05:595:57
2511.95:595:56
2611.96:005:56
2711.96:005:55
2811.96:005:54
2911.96:005:53
3011.96:005:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.02 kWh/m².

For context, solar energy here swings from a low near 4.75 kWh/m² to a high of 6.73 kWh/m² in April across the year — September's 6.02 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.0Intense
156.0Intense
166.0Intense
176.0Bright
186.0Bright
196.0Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
Planning a trip in September

Hazard calendar for Basse-Terre

In seasonPeak

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

Basse-Terre sits in the Atlantic hurricane belt; the season peaks August–October.

Basse-Terre's rainy season runs July–November, when most of the year's rain falls.

Basse-Terre sees seasonal dust haze (June–July), heaviest in July.

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

Is September a good time to visit Basse-Terre?

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

4.9
Sightseeing
12th-best month of the year
5.5
Beach & pool
11th-best month of the year

September is a reasonable time to visit Basse-Terre for sightseeing.

What to pack for Basse-Terre in September

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

In September, Basse-Terre sees daytime highs around 28°C and nights near 26°C. Pack light clothes, rain gear and sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Basse-Terre in September

The nearest coast averages about 29°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 18 km away) is warmest in September at about 29°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°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May28Warm
Jun28Tropical
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Basse-Terre 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 Basse-Terre peaks around March 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highMar 22UV 13Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Basse-Terre 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 Basse-Terre is worst in June — around 26 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2126 µg/m³Dec 238 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar9Good
Apr13Moderate
May16Moderate
Jun26Moderate
Jul25Moderate
Aug21Moderate
Sep16Moderate
Oct17Moderate
Nov11Good
Dec8Good
Location & terrain

Where is Basse-Terre?

Basse-Terre sits at 16.0°N, 61.7°W, 11 m above sea level, in Guadeloupe. The nearest listed city is Capesterre-Belle-Eau, 19 km away.

Capesterre-Belle-EauPetit-BourgBaie-MahaultPointe-à-PitreLe GosierSainte-RoseLes AbymesSainte-Anne

Topography around Basse-Terre

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

Within 3 km, the terrain around Basse-Terre has significant variations in elevation — a maximum elevation change of 337 m around an average of 66 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,456 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,444 m.

The land around Basse-Terre is covered by water (50%) and trees (31%) within 3 km, water (63%) and trees (35%) within 16 km, and water (86%) within 80 km.

3 km
337 m
16 km
1,456 m
80 km
1,444 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Capesterre-Belle-Eau 19 km · Petit-Bourg 26 km · Baie-Mahault 34 km · Pointe-à-Pitre 34 km · Le Gosier 35 km · Sainte-Rose 37 km · Les Abymes 39 km · Sainte-Anne 45 km

Guadeloupe travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz

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 Basse-Terre (15.9971°, -61.7321°, elevation 11 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).