Gros Islet weather in October

In October, Gros Islet sees average daytime highs of 29°C and overnight lows near 25°C, with 119 mm of rain across 20.9 wet days and about 11.7 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 28% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of October to 11 h 30 min by month's end. Set against the rest of the year, October is Gros Islet's 10th-clearest and 11th-windiest month. For the whole year in context, see Gros Islet's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
25°
10th coldest
Rainfall
119 mm
20.9 wet days
Daylight
11 h 42 min
5:58 AM – 5:39 PM
Cloud cover
64%
10th clearest
Wind
16 km/h
11th windiest
Solar energy
5.46 kWh/m²
Travel score
4.0
out of 10

Gros Islet is town in Saint Lucia.

Density
248/km²
people per km²
Founded
1749

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

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

A typical October day in Gros Islet 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 31°C. Set against its neighbours, October runs on par with September and on par with November.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63026
73026
83026
93026
103026
113026
122925
132925
142925
152925
162925
172925
182925
192925
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925
312925

How October really feels in Gros Islet

Once humidity and wind are folded in, October averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Gros Islet weather by month

How October compares with the rest of the year at a glance. October 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
Jan28° / 24°3111.811.36.5
Feb28° / 24°218.811.56.7
Mar28° / 24°269.811.96.1
Apr29° / 25°3611.512.35.4
May29° / 25°4712.512.64.9
Jun29° / 25°6515.112.84.5
Jul29° / 25°8320.312.74.2
Aug30° / 26°9920.712.54.0
Sep30° / 26°10419.412.13.9
Oct29° / 25°11920.911.74.0
Nov29° / 25°10218.911.34.5
Dec28° / 25°421311.25.7

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 18% of October, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
24060
34060
44060
54060
64159
74159
84258
94357
104456
114456
124555
134555
144654
154654
164654
174654
184753
194753
204753
214753
224654
234753
244753
254852
264852
274852
284852
294951
305050
315149

Chance of precipitation in October

Any precipitation

Gros Islet gets around 119 mm of rain over 20.9 wet days in October, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 67% and peaks near 69% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
169
269
369
469
569
669
769
869
969
1069
1169
1269
1368
1468
1568
1667
1767
1867
1967
2067
2166
2266
2366
2465
2565
2665
2764
2864
2964
3064
3163

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the oppressive band about 88% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
118712
218613
318613
418613
518613
618613
718514
818514
918514
1018514
1118514
1218514
1318514
1418613
1518613
1618712
1718712
1818712
1918811
2008911
2109010
2209010
230919
240919
250928
260928
270928
280937
290937
300937
310937

Wind in October

Winds average 16 km/h in October.

Across October, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 54 min at the start of October to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over October. Sunrise moves from 5:57 AM to 6:02 AM, and sunset from 5:49 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:575:49
211.95:575:48
311.85:575:48
411.85:575:47
511.85:575:46
611.85:575:46
711.85:575:45
811.85:575:44
911.85:575:44
1011.85:575:43
1111.75:585:42
1211.75:585:42
1311.75:585:41
1411.75:585:40
1511.75:585:40
1611.75:585:39
1711.75:595:39
1811.75:595:38
1911.65:595:38
2011.65:595:37
2111.66:005:37
2211.66:005:36
2311.66:005:36
2411.66:005:35
2511.66:015:35
2611.66:015:34
2711.56:015:34
2811.56:015:33
2911.56:025:33
3011.56:025:33
3111.56:025:32

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.46 kWh/m².

For context, solar energy here swings from a low near 4.95 kWh/m² to a high of 6.65 kWh/m² in April across the year — October's 5.46 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.2Bright
315.2Bright
Planning a trip in October

Hazard calendar for Gros Islet

In seasonPeak

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

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

Gros Islet's rainy season runs June–November, when most of the year's rain falls.

Gros Islet sees seasonal dust haze (June–July), heaviest in June.

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

Is October a good time to visit Gros Islet?

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

4.0
Sightseeing
10th-best month of the year
5.3
Beach & pool
12th-best month of the year

October is a reasonable time to visit Gros Islet for sightseeing.

What to pack for Gros Islet in October

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

In October, Gros Islet sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Gros Islet in October

The nearest coast averages about 29°C in October — 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
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in Gros Islet in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Gros Islet peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 21UV 14Dec 13UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Gros Islet in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Gros Islet is worst in June — around 29 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1929 µg/m³Dec 2310 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar12Good
Apr16Moderate
May19Moderate
Jun29Moderate
Jul25Moderate
Aug21Moderate
Sep15Moderate
Oct18Moderate
Nov13Moderate
Dec10Good
Location & terrain

Where is Gros Islet?

Gros Islet sits at 14.1°N, 61.0°W, 58 m above sea level, in Saint Lucia. The nearest listed city is Castries, 10 km away.

CastriesSoufriereVieux Fort

Topography around Gros Islet

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

Within 3 km, the terrain around Gros Islet has only modest variations in elevation — a maximum elevation change of 235 m around an average of 44 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 657 m; within 80 km, large variations in elevation — a maximum elevation change of 1,149 m.

The land around Gros Islet is covered by trees (59%) and water (20%) within 3 km, water (73%) and trees (24%) within 16 km, and water (88%) within 80 km.

3 km
235 m
16 km
657 m
80 km
1,149 m
treesgrasslandartificial surfaceswaterwetland
October weather nearby: Castries 10 km · Soufriere 26 km · Vieux Fort 39 km · Ducos 57 km · Le Lamentin 61 km · Le François 61 km · Fort-de-France 61 km · Saint-Joseph 68 km

Saint Lucia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / G
240 V · 50 Hz
Prices
≈ 51% of US
price level, 2025
GDP per capita
$14,746
2025
Homicide rate
39
per 100k, 2023
Road deaths
29.8
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Roman Catholic 62%Protestant 26%none 6%other Christian 3%

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 Gros Islet (14.0667°, -60.95°, elevation 58 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).