Roura, French Guiana experiences average highs of 29°C (84°F) and lows of 23°C (73°F) throughout the year. Rainfall is frequent, averaging about 24 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. High humidity combined with warm temperatures produces a tropical feel year-round. Average highs have stayed broadly stable across the available records.
Roura, French Guiana Weather & Climate 2026
Monthly climate averages for Roura, French Guiana. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Nov 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
3.8/10
Best: January, February, March
UV Index
8
High
Temperature 29°C / 23°C
Feels Like 34°C / 27°C
Rainy Days 24
Rainfall 269 mm
Sunshine 9 h
Humidity 87%
Wind Speed 14 km/h
Dew Point 24°C
Hottest Month
32°C
September
Avg Low24°C
Rain13days
Coldest Month
23°C
June
Avg High29°C
Rain29days
Driest Month
13days
September
Avg High32°C
Avg Low24°C
Windiest Month
17 km/h
February (Gusts 35)
Sea Temperature
28°C – 31°C
Warmest water: August (
30.6°C
)
Worst Time to Visit
Consider avoiding June, July, September, October due to extreme heat, heavy rainfall, oppressive humidity.
Sun Position
Sunrise 06:19
Daylight 12.4h
Sunset 18:43
Live conditions—
Roura on the map · live conditions
Roura, French Guiana
- Continent
- Americas
- Country
- French Guiana
- City
- Roura
- Population
- 2.2K
- Coordinates
- 4.73°, -52.32°
Seasonal Breakdown
Spring
Mar–May
Avg High 29°C
Avg Low 23°C
Rain 27 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 30°C
Avg Low 23°C
Rain 26 days/mo
Autumn
Sep–Nov
Avg High 31°C
Avg Low 24°C
Rain 17 days/mo
Winter
Dec–Feb
Avg High 28°C
Avg Low 23°C
Rain 25 days/mo
2/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 28°C / 23°C . Feb: 28°C / 23°C . Mar: 29°C / 23°C . Apr: 29°C / 24°C . May: 29°C / 23°C . Jun: 29°C / 23°C . Jul: 29°C / 23°C . Aug: 31°C / 23°C . Sep: 32°C / 24°C . Oct: 32°C / 24°C . Nov: 30°C / 24°C . Dec: 28°C / 23°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 300 mm. Feb: 279 mm. Mar: 215 mm. Apr: 374 mm. May: 544 mm. Jun: 406 mm. Jul: 285 mm. Aug: 127 mm. Sep: 68 mm. Oct: 82 mm. Nov: 208 mm. Dec: 344 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 87%. Feb: 87%. Mar: 85%. Apr: 88%. May: 92%. Jun: 91%. Jul: 89%. Aug: 85%. Sep: 81%. Oct: 81%. Nov: 87%. Dec: 90%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 17 km/h . Mar: 16 km/h . Apr: 15 km/h . May: 14 km/h . Jun: 12 km/h . Jul: 11 km/h . Aug: 12 km/h . Sep: 14 km/h . Oct: 14 km/h . Nov: 14 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 9h. Feb: 8h. Mar: 9h. Apr: 8h. May: 8h. Jun: 9h. Jul: 10h. Aug: 11h. Sep: 11h. Oct: 11h. Nov: 10h. Dec: 9h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 28°C . Feb: 28°C . Mar: 28°C . Apr: 29°C . May: 29°C . Jun: 30°C . Jul: 30°C . Aug: 31°C . Sep: 31°C . Oct: 31°C . Nov: 30°C . Dec: 29°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 8. Mar: UV 8. Apr: UV 8. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 9. Sep: UV 9. Oct: UV 9. Nov: UV 8. Dec: UV 8.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 53 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Sep 2025 · 32°C | Sep · 32°C |
| Coldest month | Jul 2025 · 23°C | Jun · 23°C |
| Wettest month | May 2025 · 658 mm | May · 544 mm |
| Windiest month | Feb 2025 · 17 km/h | Feb · 17 km/h |
Month-by-Month Weather Table
January best
Wet 
February best
Wet March best
Wet April
Wet May
Wet June
Wet July
Wet August
Wet September
Poor October
Poor November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 28°C / 23°C | 32°C / 26°C | 26days (300 mm) Wet | 8.9h Good | 87% Very Muggy | 7.6 Very High | Wet | View Details |
| February best | 28°C / 23°C | 32°C / 27°C | 22days (279 mm) Wet | 8.1h Good | 87% Very Muggy | 7.9 Very High | Wet | View Details |
| March best | 29°C / 23°C | 33°C / 27°C | 24days (215 mm) Wet | 9.1h Good | 85% Humid | 8.4 Very High | Wet | View Details |
| April | 29°C / 24°C | 34°C / 27°C | 26days (374 mm) Wet | 8.2h Good | 88% Very Muggy | 8.2 Very High | Wet | View Details |
| May | 29°C / 23°C | 34°C / 28°C | 30days (544 mm) Wet | 7.5h Good | 92% Very Muggy | 7.5 Very High | Wet | View Details |
| June | 29°C / 23°C | 34°C / 27°C | 29days (406 mm) Wet | 8.7h Good | 91% Very Muggy | 8.1 Very High | Wet | View Details |
| July | 29°C / 23°C | 35°C / 27°C | 28days (285 mm) Wet | 9.8h Good | 89% Very Muggy | 8.3 Very High | Wet | View Details |
| August | 31°C / 23°C | 36°C / 28°C | 20days (127 mm) Wet | 10.8h Excellent | 85% Humid | 8.7 Very High | Wet | View Details |
| September | 32°C / 24°C | 37°C / 28°C | 13days (68 mm) Wet | 10.9h Excellent | 81% Humid | 9 Very High | Poor | View Details |
| October | 32°C / 24°C | 37°C / 29°C | 15days (82 mm) Wet | 10.8h Excellent | 81% Humid | 8.7 Very High | Poor | View Details |
| November | 30°C / 24°C | 35°C / 28°C | 24days (208 mm) Wet | 9.8h Good | 87% Very Muggy | 8.1 Very High | Wet | View Details |
| December | 28°C / 23°C | 33°C / 27°C | 28days (344 mm) Wet | 8.8h Good | 90% Very Muggy | 7.5 Very High | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Roura are January, February, March, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Roura, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Roura is September, with average daytime highs of 32°C (89°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Roura is June, with average overnight lows of 23°C (73°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Roura is May, averaging 544mm of precipitation across 30 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Roura runs through May, June, July, December, with the heaviest rainfall in May. Based on 10-year averages for Roura.
Roura receives approximately 111 sunshine hours per year. The sunniest month is September with around 11 hours. Based on climate data for Roura.
The least favorable months to visit Roura are June, July, September, October, primarily due to extreme heat, heavy rainfall, oppressive humidity. For the best conditions, consider January, February, March instead.
The annual average UV index in Roura is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Roura is 87%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 29°C (84°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Roura are 14 km/h (9 mph). The windiest month is February with peak winds reaching 17 km/h (10 mph) (gusts up to 35 km/h / 22 mph).
Roura averages 0 clear-sky days per month with overall cloud cover around 73%. The clearest skies occur in September.
The annual average dew point in Roura is 24°C (75°F), which feels oppressively humid. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Roura has a Tropical Rainforest climate, classified as Af under the Köppen system. Tropical climates are warm year-round with high rainfall and temperatures rarely dropping below 18°C (64°F).
The 'feels like' temperature in Roura ranges from 27°C (81°F) to 34°C (93°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
June is not the best time to visit Roura, with a climate score of 2.9/10. Consider visiting during January, February, March instead for better conditions.
For June in Roura, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 29°C (84°F) and 29 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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