Las Terrenas weather in September

In September, Las Terrenas sees average daytime highs of 31°C and overnight lows near 25°C, with 105 mm of rain across 19.5 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 3rd-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 26% of the time in September, and the air most often feels miserable.

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 Las Terrenas's 11th-clearest and 11th-windiest month. For the whole year in context, see Las Terrenas's year-round climate.

Daytime high
31°
1st warmest
Overnight low
25°
10th coldest
Rainfall
105 mm
19.5 wet days
Daylight
12 h 06 min
6:29 AM – 6:36 PM
Cloud cover
63%
11th clearest
Wind
9 km/h
11th windiest
Solar energy
5.57 kWh/m²
Travel score
3.3
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 Las Terrenas reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°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 about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13125
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143225
153225
163225
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303125

How September really feels in Las Terrenas

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.

Las Terrenas weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 22°4513.1116.2
Feb28° / 22°4111.511.35.9
Mar29° / 22°5612.711.95.4
Apr30° / 23°7014.812.44.8
May30° / 24°11618.312.93.9
Jun31° / 25°8215.713.13.8
Jul31° / 25°7617133.8
Aug31° / 25°8718.912.73.5
Sep31° / 25°10519.512.13.3
Oct31° / 25°11021.111.63.5
Nov29° / 24°10018.511.14.4
Dec28° / 23°5715.510.95.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34654
44654
54654
64654
74555
84555
94555
104654
114555
124555
134654
144654
154654
164753
174753
184753
194852
204852
214852
224852
234753
244654
254654
264555
274654
284555
294555
304456

Chance of precipitation in September

Any precipitation

Las Terrenas gets around 105 mm of rain over 19.5 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 66% and peaks near 68% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
162
262
362
462
562
662
762
863
963
1064
1164
1265
1365
1466
1566
1667
1767
1867
1968
2068
2168
2268
2368
2468
2568
2668
2768
2868
2968
3068

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable 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 (%)
14060
24060
34060
44060
54159
64159
74258
84258
94357
104456
114456
124555
134555
144555
154654
164654
174654
184753
194753
204753
214852
224852
234852
244951
254951
264951
274951
285050
295050
305149

Wind in September

Winds average 9 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
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
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 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 6:26 AM to 6:32 AM, and sunset from 6:49 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:266:49
212.46:276:49
312.36:276:48
412.36:276:47
512.36:276:46
612.36:276:45
712.36:286:44
812.36:286:43
912.26:286:42
1012.26:286:41
1112.26:286:40
1212.26:286:39
1312.26:296:39
1412.16:296:38
1512.16:296:37
1612.16:296:36
1712.16:296:35
1812.16:306:34
1912.16:306:33
2012.06:306:32
2112.06:306:31
2212.06:306:30
2312.06:316:29
2412.06:316:28
2511.96:316:27
2611.96:316:26
2711.96:316:26
2811.96:326:25
2911.96:326:24
3011.86:326:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.57 kWh/m².

For context, solar energy here swings from a low near 3.92 kWh/m² to a high of 6.2 kWh/m² in June across the year — September's 5.57 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Las Terrenas

In seasonPeak

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

Las Terrenas 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 Las Terrenas?

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

3.3
Sightseeing
12th-best month of the year
5.0
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Las Terrenas.

What to pack for Las Terrenas in September

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

In September, Las Terrenas sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near Las Terrenas 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 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar26Warm
Apr26Warm
May27Warm
Jun28Warm
Jul28Warm
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Las Terrenas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Las Terrenas peaks around August 15 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 highHighAug 15UV 12Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Las Terrenas 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 Las Terrenas is worst in June — around 26 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2326 µg/m³Dec 219 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr12Good
May18Moderate
Jun26Moderate
Jul26Moderate
Aug21Moderate
Sep18Moderate
Oct18Moderate
Nov11Good
Dec9Good
Location & terrain

Where is Las Terrenas?

Las Terrenas sits at 19.3°N, 69.5°W, 0 m above sea level, in Dominican Republic. The nearest listed city is Santa Barbara De Samana, 25 km away.

Santa Barbara De SamanaNaguaSabana Grande de BoyáMonte PlataBayaguanaMichesHato Mayor del ReyCotuí

Topography around Las Terrenas

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

Within 3 km, the terrain around Las Terrenas has significant variations in elevation — a maximum elevation change of 283 m around an average of 43 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 521 m; within 80 km, large variations in elevation — a maximum elevation change of 971 m.

The land around Las Terrenas is covered by trees (55%) and water (26%) within 3 km, water (60%) and trees (32%) within 16 km, and water (43%) and trees (36%) within 80 km.

3 km
283 m
16 km
521 m
80 km
971 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Santa Barbara De Samana 25 km · Nagua 33 km · Sabana Grande de Boyá 48 km · Monte Plata 61 km · Bayaguana 63 km · Miches 63 km · Hato Mayor del Rey 68 km · Cotuí 70 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 Las Terrenas (19.311°, -69.5428°, elevation 0 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).