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Monthly climate in Grand-Santi, Guyane, French Guiana

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Grand-Santi features a tropical rainforest climate (Af).Temperatures typically range between 25 °C (78 °F) and 28 °C (83 °F) through the year, but rarely can drop to 20 °C (68 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 2238 mm (88.1 inches) and receives 244 rainy days on the 1 mm (0.04 inches) threshold annually.Grand-Santi enjoys an average of 3395 hours of sunshine throughout the year, and daylight varies from 11 hours 52 minutes to 12 hours 20 minutes per day.

Monthly average temperatures in Grand-Santi, Guyane, French Guiana §

The warmest months in Grand-Santi are September, October and November, with daily mean temperatures ranging from 27 to 28 °C (81 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and May, when daily mean temperatures range from 25 to 25 °C (78 - 78 °F) throughout the day. On average each year, Grand-Santi experiences 328 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 Grand-Santi, 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 33°C
(91°F)		 33°C
(91°F)		 35°C
(96°F)		 34°C
(93°F)		 33°C
(91°F)		 33°C
(92°F)		 33°C
(91°F)		 35°C
(95°F)		 38°C
(101°F)		 37°C
(99°F)		 38°C
(100°F)		 35°C
(94°F)
Mean maximum 32°C
(90°F)		 32°C
(90°F)		 33°C
(91°F)		 33°C
(92°F)		 32°C
(91°F)		 32°C
(89°F)		 33°C
(91°F)		 34°C
(93°F)		 36°C
(97°F)		 36°C
(98°F)		 36°C
(97°F)		 33°C
(92°F)
Average high 30°C
(86°F)		 30°C
(85°F)		 30°C
(87°F)		 30°C
(86°F)		 29°C
(85°F)		 30°C
(86°F)		 31°C
(87°F)		 32°C
(89°F)		 34°C
(93°F)		 34°C
(94°F)		 33°C
(92°F)		 30°C
(87°F)
Daily mean 25°C
(78°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(78°F)		 25°C
(78°F)		 26°C
(78°F)		 26°C
(79°F)		 27°C
(80°F)		 28°C
(82°F)		 28°C
(83°F)		 27°C
(81°F)		 26°C
(78°F)
Average low 23°C
(73°F)		 23°C
(73°F)		 23°C
(73°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(73°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(74°F)
Mean minimum 21°C
(70°F)		 21°C
(70°F)		 22°C
(71°F)		 21°C
(71°F)		 22°C
(72°F)		 22°C
(72°F)		 22°C
(71°F)		 22°C
(72°F)		 22°C
(72°F)		 22°C
(72°F)		 22°C
(73°F)		 22°C
(71°F)
Minimum 20°C
(68°F)		 20°C
(69°F)		 21°C
(70°F)		 21°C
(70°F)		 22°C
(72°F)		 21°C
(71°F)		 21°C
(70°F)		 22°C
(71°F)		 21°C
(69°F)		 22°C
(72°F)		 22°C
(72°F)		 20°C
(68°F)

Compare climate in Grand-Santi with other places

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

Monthly average precipitation in Grand-Santi, Guyane, French Guiana §

Grand-Santi usually has the most precipitation in April, May and June, with an average of 26 rainy days and 356 mm (14.0 inches) of precipitation per month.The driest months in Grand-Santi are February, September and October. On average, 73 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grand-Santi, 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) 137 (5.4) 105 (4.1) 129 (5.1) 290 (11.4) 461 (18.2) 317 (12.5) 248 (9.8) 115 (4.5) 76 (3.0) 38 (1.5) 108 (4.3) 213 (8.4)
Average precipitation days (≥ 1 mm) 19 18 18 24 29 27 26 18 12 9 17 27

Monthly sunshine hours in Grand-Santi, Guyane, French Guiana §

The sunniest months in Grand-Santi are August, September and October, when the sun shines an average of 10 hours 51 minutes a day.Least sunny months in Grand-Santi: January, February and May receive an average of 7 hours 47 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grand-Santi, 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 236 247 294 249 225 268 302 335 328 335 290 281
Mean daily daylight hours 11h 53m 11h 58m 12h 4m 12h 12m 12h 18m 12h 20m 12h 19m 12h 14m 12h 7m 12h 0m 11h 54m 11h 52m

Solar UV radiation in Grand-Santi, Guyane, French Guiana §

Grand-Santi experiences the highest level of ultraviolet (UV) radiation in February, March and April, when the maximum UV index can reach values of 15 - 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 12. For more detailed information, check out our hourly Grand-Santi UV Index data.

Average daily maximum UV levels by month for Grand-Santi, 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 15 16 16 14 12 12 13 13 13 13 12