Mana, French Guiana experiences average highs of 29°C (84°F) and lows of 24°C (75°F) throughout the year. Rainfall is frequent, averaging about 22 rainy days per month. Sunshine is abundant, averaging about 10 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.
Mana, French Guiana Weather & Climate 2026
Monthly climate averages for Mana, 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
3.9/10
Best: January, February, March, April, December
UV Index
8
High
Temperature 29°C / 24°C
Feels Like 34°C / 28°C
Rainy Days 22
Rainfall 212 mm
Sunshine 10 h
Humidity 85%
Wind Speed 13 km/h
Dew Point 24°C
Hottest Month
31°C
October
Avg Low25°C
Rain13days
Coldest Month
24°C
January
Avg High28°C
Rain22days
Driest Month
13days
October
Avg High31°C
Avg Low25°C
Windiest Month
16 km/h
February (Gusts 40)
Sea Temperature
27°C – 30°C
Warmest water: September (
30.2°C
)
Worst Time to Visit
Consider avoiding August, November due to extreme heat, heavy rainfall, oppressive humidity.
Sun Position
Sunrise 06:23
Daylight 12.4h
Sunset 18:50
Live conditions—
Mana on the map · live conditions
Mana, French Guiana
- Continent
- Americas
- Country
- French Guiana
- City
- Mana
- Population
- 5.9K
- Coordinates
- 5.67°, -53.78°
Seasonal Breakdown
Spring
Mar–May
Avg High 28°C
Avg Low 24°C
Rain 25 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 29°C
Avg Low 24°C
Rain 26 days/mo
Autumn
Sep–Nov
Avg High 31°C
Avg Low 25°C
Rain 16 days/mo
Winter
Dec–Feb
Avg High 28°C
Avg Low 24°C
Rain 23 days/mo
3/3 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 / 24°C . Feb: 28°C / 24°C . Mar: 28°C / 24°C . Apr: 28°C / 24°C . May: 28°C / 24°C . Jun: 28°C / 24°C . Jul: 29°C / 24°C . Aug: 30°C / 24°C . Sep: 31°C / 25°C . Oct: 31°C / 25°C . Nov: 30°C / 25°C . Dec: 28°C / 24°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 176 mm. Feb: 167 mm. Mar: 157 mm. Apr: 309 mm. May: 428 mm. Jun: 377 mm. Jul: 267 mm. Aug: 153 mm. Sep: 71 mm. Oct: 71 mm. Nov: 149 mm. Dec: 219 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 84%. Feb: 82%. Mar: 81%. Apr: 85%. May: 89%. Jun: 90%. Jul: 88%. Aug: 84%. Sep: 81%. Oct: 80%. Nov: 85%. Dec: 87%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 16 km/h . Mar: 16 km/h . Apr: 15 km/h . May: 13 km/h . Jun: 11 km/h . Jul: 10 km/h . Aug: 11 km/h . Sep: 12 km/h . Oct: 13 km/h . Nov: 13 km/h . Dec: 14 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 9h. Mar: 10h. Apr: 9h. May: 8h. Jun: 8h. 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: 27°C . Mar: 28°C . Apr: 28°C . May: 29°C . Jun: 29°C . Jul: 30°C . Aug: 30°C . Sep: 30°C . Oct: 30°C . Nov: 29°C . Dec: 28°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 9. Mar: UV 9. Apr: UV 9. 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 39 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Oct 2025 · 31°C | Oct · 31°C |
| Coldest month | Jun 2025 · 24°C | Jan · 24°C |
| Wettest month | May 2025 · 574 mm | May · 428 mm |
| Windiest month | Feb 2025 · 17 km/h | Feb · 16 km/h |
Month-by-Month Weather Table
January best
Wet 
February best
Wet March best
Wet April best
Wet May
Wet June
Wet July
Wet August
Wet September
Poor October
Poor November
Wet December best
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 28°C / 24°C | 32°C / 27°C | 22days (176 mm) Wet | 9.5h Good | 84% Humid | 7.9 Very High | Wet | View Details |
| February best | 28°C / 24°C | 31°C / 27°C | 20days (167 mm) Wet | 8.9h Good | 82% Humid | 8.6 Very High | Wet | View Details |
| March best | 28°C / 24°C | 32°C / 28°C | 20days (157 mm) Wet | 9.7h Good | 81% Humid | 8.9 Very High | Wet | View Details |
| April best | 28°C / 24°C | 33°C / 28°C | 25days (309 mm) Wet | 8.6h Good | 85% Humid | 8.6 Very High | Wet | View Details |
| May | 28°C / 24°C | 34°C / 29°C | 30days (428 mm) Wet | 7.8h Good | 89% Very Muggy | 7.7 Very High | Wet | View Details |
| June | 28°C / 24°C | 34°C / 28°C | 29days (377 mm) Wet | 8.3h Good | 90% Very Muggy | 7.9 Very High | Wet | View Details |
| July | 29°C / 24°C | 35°C / 28°C | 28days (267 mm) Wet | 9.9h Good | 88% Very Muggy | 8.3 Very High | Wet | View Details |
| August | 30°C / 24°C | 36°C / 29°C | 21days (153 mm) Wet | 10.6h Excellent | 84% Humid | 8.8 Very High | Wet | View Details |
| September | 31°C / 25°C | 37°C / 30°C | 14days (71 mm) Wet | 10.8h Excellent | 81% Humid | 9.2 Very High | Poor | View Details |
| October | 31°C / 25°C | 37°C / 30°C | 13days (71 mm) Wet | 10.7h Excellent | 80% Humid | 8.7 Very High | Poor | View Details |
| November | 30°C / 25°C | 35°C / 29°C | 21days (149 mm) Wet | 9.9h Good | 85% Humid | 8.3 Very High | Wet | View Details |
| December best | 28°C / 24°C | 33°C / 28°C | 26days (219 mm) Wet | 9.4h Good | 87% Very Muggy | 7.8 Very High | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Mana are January, February, March, April, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Mana, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Mana is October, with average daytime highs of 31°C (88°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Mana is January, with average overnight lows of 24°C (75°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Mana is May, averaging 428mm of precipitation across 30 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Mana runs through May, June, July, December, with the heaviest rainfall in May. Based on 10-year averages for Mana.
Mana receives approximately 114 sunshine hours per year. The sunniest month is September with around 11 hours. Based on climate data for Mana.
The least favorable months to visit Mana are August, November, primarily due to extreme heat, heavy rainfall, oppressive humidity. For the best conditions, consider January, February, March, April, December instead.
The annual average UV index in Mana is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Mana is 85%, 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 Mana are 13 km/h (8 mph). The windiest month is February with peak winds reaching 16 km/h (10 mph) (gusts up to 40 km/h / 25 mph).
Mana 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 Mana is 24°C (75°F), which feels oppressively humid. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Mana 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 Mana ranges from 28°C (82°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 Mana, with a climate score of 3.2/10. Consider visiting during January, February, March, April, December instead for better conditions.
For June in Mana, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 28°C (83°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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