La Romana weather in September

In September, La Romana sees average daytime highs of 31°C and overnight lows near 25°C, with 96 mm of rain across 16.5 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 24% 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 La Romana's 11th-clearest and 11th-windiest month. For the whole year in context, see La Romana's year-round climate.

Daytime high
31°
4th warmest
Overnight low
25°
10th coldest
Rainfall
96 mm
16.5 wet days
Daylight
12 h 06 min
6:27 AM – 6:33 PM
Cloud cover
64%
11th clearest
Wind
10 km/h
11th windiest
Solar energy
5.55 kWh/m²
Travel score
3.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in La Romana reaches about 31°C in the afternoon and slips back to 25°C overnight — a 7°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 on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143225
153225
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283124
293124
303124

How September really feels in La Romana

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.

La Romana weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 22°174.4116.5
Feb29° / 22°154.711.46.2
Mar30° / 22°246.411.95.7
Apr30° / 23°419.212.45.0
May31° / 24°8414.512.94.2
Jun32° / 25°5511.613.14.0
Jul32° / 25°5310.2134.0
Aug32° / 25°7513.512.63.7
Sep31° / 25°9616.512.13.6
Oct31° / 24°8817.311.63.9
Nov30° / 23°6111.711.14.9
Dec29° / 22°225.210.96.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34951
44951
54852
64852
74852
84852
94852
104753
114753
124753
134654
144654
154555
164555
174456
184456
194456
204456
214357
224357
234456
244456
254456
264456
274456
284555
294555
304555

Chance of precipitation in September

Any precipitation

La Romana gets around 96 mm of rain over 16.5 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 55% and peaks near 59% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
149
249
349
449
549
650
750
851
952
1052
1153
1254
1355
1455
1556
1656
1757
1857
1958
2058
2159
2259
2359
2458
2558
2658
2758
2857
2957
3057

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
15545
25545
35545
45545
55545
65545
75545
85644
95644
105644
115644
125644
135644
145644
155644
165644
175644
185644
195644
205545
215545
225545
235545
245545
255545
265545
275545
285545
295644
305644

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 6:25 AM to 6:30 AM, and sunset from 6:47 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:256:47
212.36:256:46
312.36:256:45
412.36:256:44
512.36:256:43
612.36:256:42
712.36:266:41
812.26:266:40
912.26:266:40
1012.26:266:39
1112.26:266:38
1212.26:266:37
1312.26:276:36
1412.16:276:35
1512.16:276:34
1612.16:276:33
1712.16:276:32
1812.16:276:31
1912.06:286:31
2012.06:286:30
2112.06:286:29
2212.06:286:28
2312.06:286:27
2412.06:286:26
2511.96:296:25
2611.96:296:24
2711.96:296:23
2811.96:296:22
2911.96:296:22
3011.96:306:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.55 kWh/m².

For context, solar energy here swings from a low near 4.19 kWh/m² to a high of 6.25 kWh/m² in June across the year — September's 5.55 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.6Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for La Romana

In seasonPeak

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

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

La Romana'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 La Romana?

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

3.6
Sightseeing
12th-best month of the year
5.5
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in La Romana.

What to pack for La Romana in September

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

In September, La Romana sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near La Romana 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 offshore 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
Nov28Tropical
Dec27Warm

UV index in La Romana 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 La Romana peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 10UV 13Dec 14UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar12Extreme
Apr13Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in La Romana 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 La Romana is worst in June — around 27 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2327 µg/m³Dec 218 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar11Good
Apr11Good
May18Moderate
Jun27Moderate
Jul27Moderate
Aug23Moderate
Sep18Moderate
Oct18Moderate
Nov11Good
Dec8Good
Location & terrain

Where is La Romana?

La Romana sits at 18.4°N, 69.0°W, 9 m above sea level, in Dominican Republic. The nearest listed city is Salvaleón de Higüey, 35 km away.

Salvaleón de HigüeySan Pedro de MacorisSanta Cruz de El SeiboHato Mayor del ReyQuisqueyaPunta CanaMichesBoca Chica

Topography around La Romana

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

Within 3 km, the terrain around La Romana has only modest variations in elevation — a maximum elevation change of 81 m around an average of 31 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 98 m; within 80 km, large variations in elevation — a maximum elevation change of 683 m.

The land around La Romana is covered by artificial surfaces (37%), trees (22%) and grassland (21%) within 3 km, water (37%), grassland (35%) and trees (22%) within 16 km, and water (52%), grassland (24%) and trees (22%) within 80 km.

3 km
81 m
16 km
98 m
80 km
683 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Salvaleón de Higüey 35 km · San Pedro de Macoris 36 km · Santa Cruz de El Seibo 39 km · Hato Mayor del Rey 49 km · Quisqueya 49 km · Punta Cana 62 km · Miches 63 km · Boca Chica 67 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 La Romana (18.4233°, -68.9664°, elevation 9 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).