Matoury in Summer
In summer (June, July and August), Matoury sees average daytime highs around 30°C and overnight lows near 23°C, with 719 mm of rain over about 75 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 29°C in early June to 31°C by late August. The sky is clear or mostly clear about 27% of the time across summer, and the air most often feels oppressive.
Summer is Matoury's weakest season of the year to visit on our travel score. Matoury 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 Matoury's year-round climate.
- Avg daytime high
- 30°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 719 mm
- 75 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.5
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Matoury in Summer
Over the season highs climb from about 29°C in early June to 31°C by late August.
A typical summer day in Matoury reaches about 30°C and drops to 23°C overnight. The warmest of the three months is August, the coolest July.
How summer really feels in Matoury
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Matoury weather by month
How the three summer months (June, July and August) 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 | 28° / 24° | 259 | 26.5 | 11.8 | 3.7 |
| Feb | 28° / 24° | 217 | 22.2 | 11.8 | 4.0 |
| Mar | 29° / 24° | 175 | 22.9 | 12 | 3.9 |
| Apr | 29° / 24° | 264 | 24.8 | 12.1 | 3.5 |
| May | 29° / 24° | 408 | 29.2 | 12.2 | 3.1 |
| Jun | 29° / 23° | 354 | 28.4 | 12.3 | 3.1 |
| Jul | 30° / 23° | 240 | 26.6 | 12.3 | 3.4 |
| Aug | 30° / 23° | 126 | 19.9 | 12.2 | 3.9 |
| Sep | 31° / 23° | 62 | 13 | 12 | 4.3 |
| Oct | 31° / 24° | 72 | 14.5 | 11.9 | 4.2 |
| Nov | 30° / 24° | 154 | 21.1 | 11.8 | 3.6 |
| Dec | 29° / 24° | 274 | 27.4 | 11.7 | 3.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 27% of the time across summer.
Chance of precipitation in Summer
Matoury gets around 719 mm of rain over 75 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 18 min in early June to 12 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.9 kWh/m².
Is summer a good time to visit Matoury?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Matoury.
What to pack for Matoury in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Matoury sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 75 days see rain.
Sea temperature near Matoury in Summer
The nearest coast averages about 28°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 22 km away) is warmest in July at about 28°C and coldest in January 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 | 28 | 28 | 28 | 28 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 28 | Warm |
| May | 28 | Warm |
| Jun | 28 | Tropical |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 28 | Tropical |
| Oct | 28 | Tropical |
| Nov | 28 | Warm |
| Dec | 27 | Warm |
UV index in Matoury in Summer
Clear-sky midday UV across summer 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 Matoury peaks around April 12 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 Matoury in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Matoury is worst in February — around 26 µg/m³ PM2.5 (moderate), about 3.6× 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) | 23 | 26 | 25 | 24 | 17 | 10 | 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 | 23 | Moderate |
| Feb | 26 | Moderate |
| Mar | 25 | Moderate |
| Apr | 24 | Moderate |
| May | 17 | Moderate |
| Jun | 10 | Good |
| Jul | 7 | Good |
| Aug | 7 | Good |
| Sep | 8 | Good |
| Oct | 10 | Good |
| Nov | 11 | Good |
| Dec | 18 | Moderate |
Where is Matoury?
Matoury sits at 4.8°N, 52.3°W, 13 m above sea level, in French Guiana. The nearest listed city is Rémire-Montjoly, 10 km away.
Topography around Matoury
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Matoury.
Within 3 km, the terrain around Matoury has only modest variations in elevation — a maximum elevation change of 171 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 244 m; within 80 km, significant variations in elevation — a maximum elevation change of 487 m.
The land around Matoury is covered by trees (79%) within 3 km, trees (54%) and water (26%) within 16 km, and trees (56%) and water (38%) 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 Matoury (4.8492°, -52.3235°, elevation 13 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.