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Monthly climate in Sinnamary, Guyane, French Guiana

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Sinnamary features a tropical rainforest climate (Af).Temperatures typically range between 26 °C (79 °F) and 27 °C (82 °F) through the year, but rarely can drop to 23 °C (74 °F) or can rise to as high as 30 °C (87 °F).The average annual precipitation amounts to about 2670 mm (105.1 inches) and receives 294 rainy days on the 1 mm (0.04 inches) threshold annually.Sinnamary enjoys an average of 3623 hours of sunshine throughout the year, and daylight varies from 11 hours 48 minutes to 12 hours 24 minutes per day.

Monthly average temperatures in Sinnamary, Guyane, French Guiana §

The warmest months in Sinnamary are August, September and October, with daily mean temperatures ranging from 27 to 27 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 26 to 26 °C (79 - 79 °F) throughout the day. On average each year, Sinnamary experiences 329 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sinnamary, Guyane, French Guiana.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 29°C
(84°F)		 28°C
(82°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(84°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(84°F)
Mean maximum 28°C
(83°F)		 28°C
(82°F)		 28°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(86°F)		 30°C
(85°F)		 29°C
(85°F)		 28°C
(83°F)
Average high 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(84°F)		 29°C
(84°F)		 28°C
(83°F)		 27°C
(81°F)
Daily mean 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(80°F)		 27°C
(81°F)		 27°C
(82°F)		 27°C
(82°F)		 27°C
(81°F)		 26°C
(79°F)
Average low 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)
Mean minimum 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)
Minimum 24°C
(75°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 23°C
(74°F)		 25°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(75°F)

Compare climate in Sinnamary with other places

Compare temperature, precipitation, sunshine, UV index in Sinnamary, Guyane, French Guiana with other places around the world.

Monthly average precipitation in Sinnamary, Guyane, French Guiana §

Sinnamary usually has the most precipitation in April, May and June, with an average of 28 rainy days and 411 mm (16.2 inches) of precipitation per month.The driest months in Sinnamary are August, September and October. On average, 80 mm (3.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sinnamary, Guyane, French Guiana.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 169 (6.7) 135 (5.3) 153 (6.0) 334 (13.2) 475 (18.7) 423 (16.6) 242 (9.5) 103 (4.1) 68 (2.7) 70 (2.8) 202 (8.0) 294 (11.6)
Average precipitation days (≥ 1 mm) 22 24 25 27 30 29 29 20 16 18 25 29

Monthly sunshine hours in Sinnamary, Guyane, French Guiana §

The sunniest months in Sinnamary are August, September and October, when the sun shines an average of 11 hours 8 minutes a day.Least sunny months in Sinnamary: January, February and May receive an average of 8 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sinnamary, Guyane, French Guiana.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 251 265 318 284 276 280 328 346 336 342 302 291
Mean daily daylight hours 11h 50m 11h 56m 12h 4m 12h 13m 12h 21m 12h 24m 12h 22m 12h 16m 12h 7m 11h 58m 11h 51m 11h 48m

Solar UV radiation in Sinnamary, Guyane, French Guiana §

Sinnamary experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 14 - 16, which corresponds to the Extreme category of sun exposure.June, July and December are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 13. For more detailed information, check out our hourly Sinnamary UV Index data.

Average daily maximum UV levels by month for Sinnamary, Guyane, French Guiana.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 13 14 16 16 14 13 12 13 13 13 13 11