Lamentin, Guadeloupe — Weather in September 2026

Climate Overview

Lamentin, Guadeloupe in September has hot conditions, with highs reaching 29.5°C (85°F) and afternoons the warmest part of the day. Rain falls on about 19 days this month, totalling around 116 mm. Sea temperature reaches 30.7°C (87°F).

This month falls at the beginning of Autumn.

Temperatures remain fairly steady throughout September, with daily highs around 29°C (84°F).

Rainfall is heaviest during the middle of the month, while the first third tends to be drier.

Expect around 11.3h of sunshine at the start of September, decreasing to 9.9h by the end.

The warmest days tend to fall around the 10th, averaging 29.9°C (86°F).

Monthly September Averages

Temperature

30°C / 26°C

Feels Like

35°C / 30°C

Rain

19 days · 116 mm

Sunshine

10.8h / day

Humidity

80% — Very Muggy

Wind

18 km/h

Wind Direction

E (91°)

Gusts

33 km/h

Daylight

12.2 h

Cloud Cover

62%

Clear Sky Days

0.8

UV Index

8.3 — Very High

Sea Temperature

31°C

Dew Point

24°C — Oppressive

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:56

Daylight 12.2h

Sunset 18:10

What to Expect

Daytime temperatures around 30°C (85°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.

Recent yearly records for September have stayed close to the long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January best	27°C / 24°C	29°C / 26°C	11days (31 mm) Wet	10.5h Excellent	76% Humid	6.5 High	Excellent	View Details
February best	27°C / 24°C	29°C / 25°C	12days (38 mm) Wet	10.7h Excellent	76% Humid	7.5 Very High	Excellent	View Details
March best	27°C / 24°C	31°C / 26°C	12days (34 mm) Wet	11.2h Excellent	75% Muggy	8.4 Very High	Excellent	View Details
April	28°C / 24°C	32°C / 27°C	11days (41 mm) Wet	11.6h Excellent	76% Humid	8.1 Very High	Good	View Details
May	29°C / 25°C	33°C / 28°C	11days (35 mm) Wet	11.6h Excellent	77% Humid	8.5 Very High	Fair	View Details
June	29°C / 26°C	33°C / 29°C	11days (35 mm) Wet	11.6h Excellent	77% Humid	8.4 Very High	Fair	View Details
July	29°C / 26°C	34°C / 29°C	18days (58 mm) Wet	11.7h Excellent	79% Humid	8.5 Very High	Wet	View Details
August	29°C / 26°C	35°C / 30°C	18days (77 mm) Wet	11.4h Excellent	80% Humid	8.6 Very High	Wet	View Details
September	30°C / 26°C	35°C / 30°C	19days (116 mm) Wet	10.8h Excellent	80% Humid	8.3 Very High	Wet	View Details
October	29°C / 26°C	35°C / 30°C	20days (97 mm) Wet	10.3h Excellent	81% Humid	7.4 Very High	Wet	View Details
November	28°C / 25°C	33°C / 28°C	18days (86 mm) Wet	10h Excellent	81% Humid	6.9 High	Wet	View Details
December best	27°C / 24°C	30°C / 27°C	16days (44 mm) Wet	10.1h Excellent	79% Humid	6.3 High	Excellent	View Details

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketWaterproof shoesBreathable clothingSunscreen (SPF 30+)Sun hatSunglasses

Frequently Asked Questions

Expand all

Is September a good time to visit Lamentin?

September is typically wet for visiting Lamentin, with average highs of 30°C (85°F) and around 19 rainy days. Lamentin, Guadeloupe in September has hot conditions, with highs reaching 29.5°C (85°F) and afternoons the warmest part

Does it rain a lot in Lamentin in September?

Lamentin typically sees around 19 rainy days in September with 116 mm (4.6 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Lamentin in September?

Nights stay pleasantly warm in Lamentin during September, around 26°C (79°F). Light evening wear is sufficient.

What should I pack for Lamentin in September?

With highs of 30°C (85°F) and lows of 26°C (79°F) in September, we recommend: Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). Comfortable walking shoes are essential.

Is September among the best months weather-wise in Lamentin?

September is not the most favourable month weather-wise in Lamentin. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Lamentin in September?

The average UV index in Lamentin during September is 8 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.

How many hours of daylight are there in Lamentin in September?

Lamentin gets approximately 12 hours of daylight per day in September, with around 11 hours of sunshine.

Does it snow in Lamentin in September?

Snow is uncommon in Lamentin during September based on 10-year climate averages.

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