Saint-Laurent-du-Maroni in Fall
In fall (September, October and November), Saint-Laurent-du-Maroni sees average daytime highs around 31°C and overnight lows near 23°C, with 361 mm of rain over about 53 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across fall, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 33% of the time across fall, and the air most often feels oppressive.
Fall is Saint-Laurent-du-Maroni's 3rd-best season to visit on our travel score. Saint-Laurent-du-Maroni has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Saint-Laurent-du-Maroni's year-round climate.
- Avg daytime high
- 31°C
- warmest season of the year
- Avg overnight low
- 23°C
- Rainfall
- 361 mm
- 53 wet days
- Avg wind
- 9 km/h
- Travel score
- 3.7
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Saint-Laurent-du-Maroni in Fall
Across fall, daytime highs hold fairly steady around 31°C.
A typical fall day in Saint-Laurent-du-Maroni reaches about 31°C and drops to 23°C overnight. The warmest of the three months is September, the coolest September.
How fall really feels in Saint-Laurent-du-Maroni
Once humidity and wind are folded in, fall brings about 91 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Saint-Laurent-du-Maroni weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 23° | 164 | 21.4 | 11.7 | 4.1 |
| Feb | 29° / 23° | 123 | 17 | 11.8 | 4.4 |
| Mar | 29° / 23° | 106 | 17.4 | 12 | 4.4 |
| Apr | 29° / 24° | 186 | 21.3 | 12.1 | 3.7 |
| May | 30° / 24° | 320 | 27.4 | 12.2 | 3.1 |
| Jun | 30° / 23° | 332 | 28.1 | 12.3 | 2.9 |
| Jul | 30° / 23° | 254 | 26.5 | 12.3 | 3.1 |
| Aug | 31° / 23° | 148 | 19.5 | 12.2 | 3.6 |
| Sep | 31° / 23° | 88 | 14.6 | 12 | 3.9 |
| Oct | 31° / 23° | 100 | 16.1 | 11.9 | 3.8 |
| Nov | 31° / 23° | 172 | 21.9 | 11.7 | 3.3 |
| Dec | 29° / 23° | 203 | 25.1 | 11.7 | 3.4 |
Cloud cover in Fall
The sky is clear or mostly clear about 33% of the time across fall.
Chance of precipitation in Fall
Saint-Laurent-du-Maroni gets around 361 mm of rain over 53 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 9 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 06 min in early September to 11 h 42 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 5.8 kWh/m².
Is fall a good time to visit Saint-Laurent-du-Maroni?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in Saint-Laurent-du-Maroni.
What to pack for Saint-Laurent-du-Maroni in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Saint-Laurent-du-Maroni sees daytime highs around 31°C and nights near 23°C. Pack light clothes, rain gear and sun protection. About 53 days see rain.
Sea temperature near Saint-Laurent-du-Maroni in Fall
The nearest coast averages about 28°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 43 km away) is warmest in August at about 28°C and coldest in January near 26°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 26 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 27 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 28 | Tropical |
| Oct | 28 | Tropical |
| Nov | 28 | Warm |
| Dec | 27 | Warm |
UV index in Saint-Laurent-du-Maroni in Fall
Clear-sky midday UV across fall averages 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 Saint-Laurent-du-Maroni peaks around March 24 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (extreme).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 13 | 14 | 14 | 13 | 11 | 11 | 11 | 12 | 12 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Extreme |
Air quality in Saint-Laurent-du-Maroni in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Saint-Laurent-du-Maroni is worst in February — around 24 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (August, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 22 | 24 | 24 | 24 | 19 | 12 | 8 | 7 | 10 | 14 | 12 | 18 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Moderate | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 24 | Moderate |
| Mar | 24 | Moderate |
| Apr | 24 | Moderate |
| May | 19 | Moderate |
| Jun | 12 | Good |
| Jul | 8 | Good |
| Aug | 7 | Good |
| Sep | 10 | Good |
| Oct | 14 | Moderate |
| Nov | 12 | Good |
| Dec | 18 | Moderate |
Where is Saint-Laurent-du-Maroni?
Saint-Laurent-du-Maroni sits at 5.5°N, 54.0°W, 10 m above sea level, in French Guiana. The nearest listed city is Blauwgrond, 126 km away.
Topography around Saint-Laurent-du-Maroni
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint-Laurent-du-Maroni.
Within 3 km, the terrain around Saint-Laurent-du-Maroni has only modest variations in elevation — a maximum elevation change of 48 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 87 m; within 80 km, significant variations in elevation — a maximum elevation change of 574 m.
The land around Saint-Laurent-du-Maroni is covered by water (41%) and trees (34%) within 3 km, trees (86%) within 16 km, and trees (73%) and water (23%) within 80 km.
French Guiana travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E
- 220 V · 50 Hz
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 Saint-Laurent-du-Maroni (5.5015°, -54.0292°, elevation 10 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.