Grand Gosier weather in September

In September, Grand Gosier sees average daytime highs of 27°C and overnight lows near 23°C, with 122 mm of rain across 20.8 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 23% 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 Grand Gosier's 12th-clearest and 8th-windiest month. For the whole year in context, see Grand Gosier's year-round climate.

Daytime high
27°
4th warmest
Overnight low
23°
11th coldest
Rainfall
122 mm
20.8 wet days
Daylight
12 h 06 min
5:39 AM – 5:45 PM
Cloud cover
64%
12th clearest
Wind
6 km/h
8th windiest
Solar energy
6.03 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 27°C through the month.

A typical September day in Grand Gosier reaches about 27°C in the afternoon and slips back to 23°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12723
22723
32723
42723
52723
62723
72723
82723
92723
102723
112723
122723
132723
142723
152723
162723
172723
182723
192723
202723
212723
222723
232723
242723
252723
262723
272723
282723
292723
302723

Grand Gosier weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 20°288117.7
Feb25° / 20°398.811.47.4
Mar25° / 21°8716.111.96.2
Apr25° / 21°11920.412.45.4
May26° / 22°13821.412.85.0
Jun27° / 23°6714.213.15.7
Jul28° / 23°5913.4136.0
Aug28° / 23°1111712.65.5
Sep27° / 23°12220.812.14.8
Oct27° / 23°13520.211.65.1
Nov26° / 22°7415.211.16.1
Dec25° / 21°358.510.97.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24852
34852
44951
54951
64951
74951
84852
94852
104852
114852
124753
134753
144753
154753
164654
174654
184555
194555
204456
214357
224357
234357
244258
254258
264258
274258
284159
294159
304357

Chance of precipitation in September

Any precipitation

Grand Gosier gets around 122 mm of rain over 20.8 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 69% and peaks near 71% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
166
266
366
466
566
666
767
867
968
1068
1169
1269
1369
1470
1570
1670
1770
1871
1971
2071
2171
2271
2371
2471
2570
2670
2769
2869
2968
3068

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
Muggy (%)Oppressive (%)
14258
24258
34258
44159
54159
64060
74060
84060
94060
104060
114060
124060
134060
144159
154159
164258
174258
184357
194456
204555
214654
224852
234951
245050
255248
265347
275446
285446
295545
305644

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:37 AM to 5:41 AM, and sunset from 5:58 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:375:58
212.35:375:57
312.35:375:57
412.35:375:56
512.35:375:55
612.35:375:54
712.35:385:53
812.25:385:52
912.25:385:51
1012.25:385:50
1112.25:385:50
1212.25:385:49
1312.25:385:48
1412.15:395:47
1512.15:395:46
1612.15:395:45
1712.15:395:44
1812.15:395:43
1912.05:395:42
2012.05:405:41
2112.05:405:41
2212.05:405:40
2312.05:405:39
2412.05:405:38
2511.95:405:37
2611.95:415:36
2711.95:415:35
2811.95:415:34
2911.95:415:33
3011.95:415:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.03 kWh/m².

For context, solar energy here swings from a low near 4.69 kWh/m² to a high of 6.9 kWh/m² in July across the year — September's 6.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.0Intense
176.0Intense
186.0Bright
195.9Bright
205.9Bright
215.9Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.7Bright
275.7Bright
285.7Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Grand Gosier

In seasonPeak

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

Grand Gosier 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 Grand Gosier?

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
4.9
Beach & pool
10th-best month of the year

September is a reasonable time to visit Grand Gosier for sightseeing.

What to pack for Grand Gosier in September

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

In September, Grand Gosier sees daytime highs around 27°C and nights near 23°C. Pack light clothes, rain gear and sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Grand Gosier in September

The nearest coast averages about 30°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 30°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
Apr28Warm
May28Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Grand Gosier 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 Grand Gosier peaks around March 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 highMar 22UV 12Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Grand Gosier 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 Grand Gosier is worst in June — around 29 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2329 µg/m³Jan 1310 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar11Good
Apr12Moderate
May19Moderate
Jun29Moderate
Jul29Moderate
Aug24Moderate
Sep18Moderate
Oct18Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Grand Gosier?

Grand Gosier sits at 18.2°N, 71.9°W, 25 m above sea level, in Haiti. The nearest listed city is Fond Parisien, 36 km away.

Fond ParisienKenscoffPétionvilleCroix-des-BouquetsThomazeauDelmasPort-au-Prince

Topography around Grand Gosier

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

Within 3 km, the terrain around Grand Gosier has significant variations in elevation — a maximum elevation change of 577 m around an average of 147 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,052 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,681 m.

The land around Grand Gosier is covered by water (41%) and trees (35%) within 3 km, water (43%), trees (27%) and grassland (26%) within 16 km, and water (34%), trees (30%) and grassland (26%) within 80 km.

3 km
577 m
16 km
2,052 m
80 km
2,681 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Fond Parisien 36 km · Kenscoff 48 km · Pétionville 53 km · Croix-des-Bouquets 54 km · Thomazeau 55 km · Delmas 57 km · Port-au-Prince 60 km · Neiba 63 km

Haiti travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type A / B
110 V · 60 Hz
Prices
≈ 86% of US
price level, 2025
GDP per capita
$2,694
2025
Happiness
3.6 / 10
World Happiness, 2020
Homicide rate
41.2
per 100k, 2023
Road deaths
18.8
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 444
Religion
Catholic 55%Protestant 29%none 10%other 5%

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 Grand Gosier (18.1854°, -71.9182°, elevation 25 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).