UTC Offset
UTC-03:00
Sinnamary, French Guiana Snapshot 2026
Where is Sinnamary?
Sinnamary, French Guiana
- Continent
- Americas
- Country
- French Guiana
- City
- Sinnamary
- Population
- 3.2K
- Coordinates
- 5.38°, -52.96°
Sinnamary is a city in French Guiana with a population of approximately 3.2K. Average temperatures range from 24°C (76°F) in June to 30°C (86°F) in September. The best time to visit is January, February, March, April, December.
Time in Sinnamary right now
Open full time & time zone page 02:00 00
Wednesday, June 17, 2026
IANA time zone
America/Cayenne
Daylight saving
No DST
Next DST change
—
Live weather in Sinnamary
Daylight in Sinnamary today
View full sunrise & sunset page Sunrise
Sunset
Day length
12h 26m
Climate normals for Sinnamary
Long-term monthly averages based on historical data.
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 | 27°C / 24°C | 31°C / 28°C | 25days (234 mm) Wet | 9.2h Good | 83% Humid | 7.7 Very High | Wet | View Details |
| February best | 27°C / 24°C | 31°C / 28°C | 22days (250 mm) Wet | 8.4h Good | 83% Humid | 8.1 Very High | Wet | View Details |
| March best | 28°C / 25°C | 32°C / 28°C | 23days (193 mm) Wet | 9.4h Good | 81% Humid | 8.7 Very High | Wet | View Details |
| April best | 28°C / 25°C | 32°C / 29°C | 26days (342 mm) Wet | 8.4h Good | 85% Humid | 8.4 Very High | Wet | View Details |
| May | 28°C / 25°C | 33°C / 29°C | 30days (517 mm) Wet | 7.6h Good | 89% Very Muggy | 7.1 Very High | Wet | View Details |
| June | 28°C / 24°C | 34°C / 29°C | 29days (408 mm) Wet | 8.5h Good | 89% Very Muggy | 7.9 Very High | Wet | View Details |
| July | 29°C / 24°C | 34°C / 29°C | 28days (247 mm) Wet | 9.7h Good | 87% Very Muggy | 8.3 Very High | Wet | View Details |
| August | 29°C / 25°C | 36°C / 30°C | 21days (141 mm) Wet | 10.7h Excellent | 84% Humid | 8.7 Very High | Wet | View Details |
| September | 30°C / 25°C | 36°C / 30°C | 14days (78 mm) Wet | 10.8h Excellent | 82% Humid | 9.2 Very High | Poor | View Details |
| October | 30°C / 26°C | 36°C / 30°C | 16days (74 mm) Wet | 10.7h Excellent | 81% Humid | 8.8 Very High | Poor | View Details |
| November | 29°C / 25°C | 34°C / 30°C | 24days (178 mm) Wet | 9.7h Good | 85% Humid | 8.2 Very High | Wet | View Details |
| December best | 28°C / 25°C | 32°C / 29°C | 27days (277 mm) Wet | 9.1h Good | 87% Very Muggy | 7.7 Very High | Wet | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 27°C / 24°C . Feb: 27°C / 24°C . Mar: 28°C / 25°C . Apr: 28°C / 25°C . May: 28°C / 25°C . Jun: 28°C / 24°C . Jul: 29°C / 24°C . Aug: 29°C / 25°C . Sep: 30°C / 25°C . Oct: 30°C / 26°C . Nov: 29°C / 25°C . Dec: 28°C / 25°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 234 mm. Feb: 250 mm. Mar: 193 mm. Apr: 342 mm. May: 517 mm. Jun: 408 mm. Jul: 247 mm. Aug: 141 mm. Sep: 78 mm. Oct: 74 mm. Nov: 178 mm. Dec: 277 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 83%. Feb: 83%. Mar: 81%. Apr: 85%. May: 89%. Jun: 89%. Jul: 87%. Aug: 84%. Sep: 82%. Oct: 81%. Nov: 85%. Dec: 87%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 17 km/h . Mar: 17 km/h . Apr: 15 km/h . May: 14 km/h . Jun: 12 km/h . Jul: 11 km/h . Aug: 11 km/h . Sep: 13 km/h . Oct: 13 km/h . Nov: 13 km/h . Dec: 14 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 27°C . Feb: 27°C . Mar: 28°C . Apr: 28°C . May: 28°C . Jun: 29°C . Jul: 29°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 8. Mar: UV 9. Apr: UV 8. May: UV 7. Jun: UV 8. Jul: UV 8. Aug: UV 9. Sep: UV 9. Oct: UV 9. Nov: UV 8. Dec: UV 8.
Frequently Asked Questions
Sinnamary has a population of approximately 3.2K.
The best months to visit Sinnamary are January, February, March, April, December, when temperatures are pleasant and rainfall is lower.
Sinnamary receives approximately 2939mm of rainfall annually across 285 rainy days.
Sinnamary is located in French Guiana, in the Americas region.