Santa Cruz de El Seibo weather in September

In September, Santa Cruz de El Seibo sees average daytime highs of 31°C and overnight lows near 24°C, with 148 mm of rain across 22.1 wet days and about 12.1 hours of daylight. It is the 2nd-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 19% 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 Santa Cruz de El Seibo's 11th-clearest and 11th-windiest month. For the whole year in context, see Santa Cruz de El Seibo's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
24°
10th coldest
Rainfall
148 mm
22.1 wet days
Daylight
12 h 06 min
6:27 AM – 6:34 PM
Cloud cover
66%
11th clearest
Wind
8 km/h
11th windiest
Solar energy
5.59 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 Santa Cruz de El Seibo reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°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)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293024
303024

How September really feels in Santa Cruz de El Seibo

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.

Santa Cruz de El Seibo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 21°3611.1116.5
Feb28° / 21°319.411.46.5
Mar28° / 21°4610.511.95.9
Apr29° / 22°7714.412.44.9
May30° / 23°14618.712.94.1
Jun31° / 24°9815.713.13.9
Jul31° / 24°10117.7133.9
Aug31° / 24°12220.412.63.5
Sep31° / 24°14822.112.13.3
Oct30° / 24°13522.911.63.5
Nov29° / 23°10018.311.14.5
Dec28° / 22°4512.910.96.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54357
64456
74456
84456
94456
104357
114258
124258
134159
144258
154258
164060
174060
184060
194060
203961
213961
223961
234060
244060
254159
264258
274159
284159
294258
304258

Chance of precipitation in September

Any precipitation

Santa Cruz de El Seibo gets around 148 mm of rain over 22.1 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 74% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
269
369
469
569
670
770
870
971
1072
1172
1273
1374
1474
1575
1675
1776
1876
1977
2077
2177
2277
2377
2476
2576
2676
2775
2875
2975
3074

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 (%)
14456
24456
34456
44357
54357
64357
74258
84258
94258
104258
114357
124357
134357
144357
154456
164456
174456
184555
194555
204555
214654
224654
234753
244753
254852
264951
274951
285050
295149
305248

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:25 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
212.46:256:46
312.36:256:45
412.36:256:44
512.36:256:44
612.36:266:43
712.36:266:42
812.26:266:41
912.26:266:40
1012.26:266:39
1112.26:266:38
1212.26:276:37
1312.26:276:36
1412.16:276:35
1512.16:276:35
1612.16:276:34
1712.16:286:33
1812.16:286:32
1912.16:286:31
2012.06:286:30
2112.06:286:29
2212.06:286:28
2312.06:296:27
2412.06:296:26
2511.96:296:25
2611.96:296:25
2711.96:296:24
2811.96:306:23
2911.96:306:22
3011.86:306:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.59 kWh/m².

For context, solar energy here swings from a low near 4.16 kWh/m² to a high of 6.32 kWh/m² in June across the year — September's 5.59 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
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.6Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Santa Cruz de El Seibo

In seasonPeak

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

Santa Cruz de El Seibo 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 Santa Cruz de El Seibo?

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

September is a weaker month for outdoor sightseeing in Santa Cruz de El Seibo.

What to pack for Santa Cruz de El Seibo in September

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

In September, Santa Cruz de El Seibo sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Santa Cruz de El Seibo 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 41 km away) 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
Apr27Warm
May27Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Santa Cruz de El Seibo 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 Santa Cruz de El Seibo peaks around August 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 highAug 16UV 12Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Santa Cruz de El Seibo 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 Santa Cruz de El Seibo 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 Santa Cruz de El Seibo?

Santa Cruz de El Seibo sits at 18.8°N, 69.0°W, 91 m above sea level, in Dominican Republic. The nearest listed city is Hato Mayor del Rey, 23 km away.

Hato Mayor del ReyMichesSalvaleón de HigüeyLa RomanaSan Pedro de MacorisQuisqueyaSanta Barbara De SamanaBayaguana

Topography around Santa Cruz de El Seibo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Cruz de El Seibo.

Within 3 km, the terrain around Santa Cruz de El Seibo has only modest variations in elevation — a maximum elevation change of 154 m around an average of 104 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 633 m; within 80 km, large variations in elevation — a maximum elevation change of 673 m.

The land around Santa Cruz de El Seibo is covered by grassland (76%) within 3 km, grassland (62%) and trees (35%) within 16 km, and water (46%), trees (27%) and grassland (23%) within 80 km.

3 km
154 m
16 km
633 m
80 km
673 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Hato Mayor del Rey 23 km · Miches 24 km · Salvaleón de Higüey 39 km · La Romana 39 km · San Pedro de Macoris 45 km · Quisqueya 45 km · Santa Barbara De Samana 58 km · Bayaguana 63 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 Santa Cruz de El Seibo (18.7648°, -69.0399°, elevation 91 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).