Oiapoque in Fall
In fall (September, October and November), Oiapoque sees average daytime highs around 33°C and overnight lows near 23°C, with 183 mm of rain over about 32 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 33°C. The sky is clear or mostly clear about 45% of the time across fall, and the air most often feels oppressive.
Fall is Oiapoque's best season of the year to visit on our travel score. For the whole year in context, see Oiapoque's year-round climate.
- Avg daytime high
- 33°C
- warmest season of the year
- Avg overnight low
- 23°C
- Rainfall
- 183 mm
- 32 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.7
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in Oiapoque in Fall
Across fall, daytime highs hold fairly steady around 33°C.
A typical fall day in Oiapoque reaches about 33°C and drops to 23°C overnight. The warmest of the three months is October, the coolest September.
How fall really feels in Oiapoque
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.
Oiapoque 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° | 284 | 26.9 | 11.8 | 3.4 |
| Feb | 29° / 23° | 262 | 22.8 | 11.9 | 3.5 |
| Mar | 29° / 23° | 213 | 23.6 | 12 | 3.5 |
| Apr | 29° / 23° | 271 | 25.1 | 12.1 | 3.2 |
| May | 29° / 23° | 381 | 29.1 | 12.2 | 2.9 |
| Jun | 30° / 23° | 276 | 27.3 | 12.2 | 3.0 |
| Jul | 30° / 23° | 190 | 25.1 | 12.2 | 3.4 |
| Aug | 31° / 23° | 94 | 15.6 | 12.1 | 4.0 |
| Sep | 33° / 23° | 36 | 7.1 | 12 | 4.1 |
| Oct | 33° / 23° | 41 | 8.2 | 11.9 | 3.7 |
| Nov | 32° / 23° | 106 | 16.4 | 11.8 | 3.4 |
| Dec | 30° / 23° | 234 | 26 | 11.8 | 3.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 45% of the time across fall.
Chance of precipitation in Fall
Oiapoque gets around 183 mm of rain over 32 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 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 06 min in early September to 11 h 48 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 5.7 kWh/m².
Is fall a good time to visit Oiapoque?
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 Oiapoque. The water and warmth also suit a beach or pool day.
What to pack for Oiapoque in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Oiapoque sees daytime highs around 33°C and nights near 23°C. Pack light clothes, rain gear and sun protection. About 32 days see rain.
Sea temperature near Oiapoque in Fall
The nearest coast averages about 29°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 64 km away) is warmest in October 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 28 | Warm |
| May | 28 | Warm |
| Jun | 28 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Oiapoque in Fall
Clear-sky midday UV across fall averages 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 Oiapoque peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 11 (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 | 14 | 14 | 14 | 13 | 12 | 11 | 11 | 12 | 13 | 11 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 11 | Extreme |
Air quality in Oiapoque 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 Oiapoque is worst in February — around 26 µg/m³ PM2.5 (moderate), about 3.9× 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 | 26 | 25 | 23 | 15 | 9 | 7 | 7 | 8 | 10 | 11 | 18 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 26 | Moderate |
| Mar | 25 | Moderate |
| Apr | 23 | Moderate |
| May | 15 | Moderate |
| Jun | 9 | Good |
| Jul | 7 | Good |
| Aug | 7 | Good |
| Sep | 8 | Good |
| Oct | 10 | Good |
| Nov | 11 | Good |
| Dec | 18 | Moderate |
Where is Oiapoque?
Oiapoque sits at 3.8°N, 51.8°W, 18 m above sea level, in Brazil. The nearest listed city is Matoury, 124 km away.
Topography around Oiapoque
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Oiapoque.
Within 3 km, the terrain around Oiapoque has only modest variations in elevation — a maximum elevation change of 97 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 124 m; within 80 km, significant variations in elevation — a maximum elevation change of 482 m.
The land around Oiapoque is covered by trees (72%) within 3 km, trees (93%) within 16 km, and trees (75%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- Religion
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 Oiapoque (3.8431°, -51.835°, elevation 18 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.