Baní weather in September

In September, Baní sees average daytime highs of 29°C and overnight lows near 25°C, with 102 mm of rain across 15.4 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 34% 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 54 min by month's end. Set against the rest of the year, September is Baní's 10th-clearest and 11th-windiest month. For the whole year in context, see Baní's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
25°
11th coldest
Rainfall
102 mm
15.4 wet days
Daylight
12 h 06 min
6:33 AM – 6:39 PM
Cloud cover
57%
10th clearest
Wind
12 km/h
11th windiest
Solar energy
5.66 kWh/m²
Travel score
4.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Baní reaches about 29°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12925
22925
32925
42925
52925
62925
72925
82925
92925
102925
112925
122925
132925
142925
152925
162925
172925
182925
192925
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925

How September really feels in Baní

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.

Baní weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 22°154.2118.0
Feb27° / 22°144.411.47.9
Mar27° / 22°19611.97.6
Apr28° / 23°318.512.46.9
May28° / 24°7915.212.85.5
Jun29° / 24°7414.713.15.1
Jul29° / 25°6211.6135.5
Aug29° / 25°9713.112.65.1
Sep29° / 25°10215.412.14.8
Oct29° / 24°10015.211.65.1
Nov28° / 24°487.911.16.6
Dec27° / 23°224.110.97.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25545
35545
45644
55644
65743
75743
85743
95743
105644
115644
125644
135644
145545
155545
165545
175545
185347
195347
205347
215248
225149
235050
245050
254951
264951
274852
284852
294951
304852

Chance of precipitation in September

Any precipitation

Baní gets around 102 mm of rain over 15.4 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 52% and peaks near 60% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
146
246
345
445
545
645
745
845
946
1046
1147
1248
1349
1450
1551
1651
1752
1853
1955
2056
2157
2257
2358
2459
2559
2659
2760
2860
2959
3059

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 90% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
108911
208911
308911
408911
508911
608911
709010
809010
909010
1009010
110919
120919
130919
140919
150919
160919
170919
1809010
1909010
2009010
2118910
221909
231909
241909
251909
261909
271909
281909
291909
301909

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 30 minutes over September. Sunrise moves from 6:30 AM to 6:35 AM, and sunset from 6:52 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:306:52
212.36:306:51
312.36:306:50
412.36:316:49
512.36:316:49
612.36:316:48
712.36:316:47
812.26:316:46
912.26:316:45
1012.26:326:44
1112.26:326:43
1212.26:326:42
1312.26:326:41
1412.16:326:41
1512.16:326:40
1612.16:336:39
1712.16:336:38
1812.16:336:37
1912.06:336:36
2012.06:336:35
2112.06:336:34
2212.06:346:33
2312.06:346:32
2412.06:346:32
2511.96:346:31
2611.96:346:30
2711.96:346:29
2811.96:356:28
2911.96:356:27
3011.96:356:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.66 kWh/m².

For context, solar energy here swings from a low near 4.35 kWh/m² to a high of 6.28 kWh/m² in July across the year — September's 5.66 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.6Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Baní

In seasonPeak

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

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

Baní's rainy season runs May–November, when most of the year's rain falls.

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

Is September a good time to visit Baní?

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

4.8
Sightseeing
12th-best month of the year
6.1
Beach & pool
12th-best month of the year

September is a reasonable time to visit Baní for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Baní in September

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

In September, Baní sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Baní 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 Baní 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 Baní peaks around March 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 highHighMar 22UV 12Dec 13UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar13Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov7Very high
Dec7High

Air quality in Baní 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 Baní is worst in June — around 28 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (January, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2328 µg/m³Jan 19 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May18Moderate
Jun28Moderate
Jul28Moderate
Aug23Moderate
Sep18Moderate
Oct18Moderate
Nov11Good
Dec9Good
Location & terrain

Where is Baní?

Baní sits at 18.3°N, 70.3°W, 67 m above sea level, in Dominican Republic. The nearest listed city is San Cristóbal, 28 km away.

San CristóbalBajos de HainaSan José de OcoaSanto Domingo OesteBella VistaAzuaVilla AltagraciaCristo Rey

Topography around Baní

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

Within 3 km, the terrain around Baní has significant variations in elevation — a maximum elevation change of 275 m around an average of 68 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,498 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,781 m.

The land around Baní is covered by trees (39%), artificial surfaces (35%) and grassland (20%) within 3 km, trees (46%) and water (29%) within 16 km, and trees (41%) and water (41%) within 80 km.

3 km
275 m
16 km
1,498 m
80 km
2,781 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: San Cristóbal 28 km · Bajos de Haina 35 km · San José de Ocoa 35 km · Santo Domingo Oeste 43 km · Bella Vista 45 km · Azua 47 km · Villa Altagracia 47 km · Cristo Rey 49 km

Dominican Republic travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
120 V · 60 Hz
Prices
≈ 39% of US
price level, 2025
GDP per capita
$11,059
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
45%
of population, 2024
Homicide rate
10.9
per 100k, 2023
Road deaths
64.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 503

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 Baní (18.2797°, -70.3318°, elevation 67 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).