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Monthly climate in Koolbaai, Sint Maarten

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Koolbaai features a tropical savanna climate (Aw).Temperatures typically range between 25 °C (77 °F) and 28 °C (82 °F) through the year, but rarely can drop to 22 °C (72 °F) or can rise to as high as 29 °C (85 °F).The average annual precipitation amounts to about 821 mm (32.3 inches) and receives 177 rainy days on the 1 mm (0.04 inches) threshold annually.Koolbaai enjoys an average of 3953 hours of sunshine throughout the year, and daylight varies from 11 hours 3 minutes to 13 hours 10 minutes per day.

Monthly average temperatures in Koolbaai, Sint Maarten §

The warmest months in Koolbaai are August, September and October, with daily mean temperatures ranging from 27 to 28 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 25 to 25 °C (77 - 78 °F) throughout the day. On average each year, Koolbaai experiences 320 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 Koolbaai, Sint Maarten.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 27°C
(81°F)		 26°C
(80°F)		 26°C
(79°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(84°F)		 29°C
(85°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(82°F)
Mean maximum 27°C
(80°F)		 26°C
(79°F)		 26°C
(79°F)		 27°C
(80°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)
Average high 26°C
(79°F)		 25°C
(78°F)		 25°C
(78°F)		 26°C
(79°F)		 27°C
(80°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(83°F)		 27°C
(81°F)		 27°C
(80°F)
Daily mean 25°C
(78°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(79°F)		 27°C
(81°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(81°F)		 27°C
(80°F)		 26°C
(79°F)
Average low 25°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)		 25°C
(78°F)
Mean minimum 23°C
(74°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)
Minimum 23°C
(74°F)		 22°C
(72°F)		 22°C
(73°F)		 23°C
(74°F)		 23°C
(74°F)		 25°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)

Compare climate in Koolbaai with other places

Compare temperature, precipitation, sunshine, UV index in Koolbaai, Sint Maarten with other places around the world.

Monthly average precipitation in Koolbaai, Sint Maarten §

Koolbaai usually has the most precipitation in September, October and November, with an average of 19 rainy days and 124 mm (4.9 inches) of precipitation per month.The driest months in Koolbaai are January, March and April. On average, 32 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Koolbaai, Sint Maarten.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) 35 (1.4) 35 (1.4) 27 (1.1) 35 (1.4) 49 (1.9) 50 (2.0) 83 (3.3) 87 (3.4) 161 (6.3) 113 (4.5) 96 (3.8) 48 (1.9)
Average precipitation days (≥ 1 mm) 14 11 10 11 11 14 17 16 22 18 17 16

Monthly sunshine hours in Koolbaai, Sint Maarten §

The sunniest months in Koolbaai are May, July and August, when the sun shines an average of 11 hours 34 minutes a day.Least sunny months in Koolbaai: January, February and November receive an average of 9 hours 37 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Koolbaai, Sint Maarten.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 259 298 350 349 362 343 362 351 321 322 308 323
Mean daily daylight hours 11h 10m 11h 32m 12h 2m 12h 33m 12h 58m 13h 10m 13h 4m 12h 41m 12h 12m 11h 42m 11h 16m 11h 3m

Solar UV radiation in Koolbaai, Sint Maarten §

Koolbaai experiences the highest level of ultraviolet (UV) radiation in April, August and September, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure.January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Koolbaai UV Index data.

Average daily maximum UV levels by month for Koolbaai, Sint Maarten.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) 9 11 13 13 13 13 13 13 14 12 9 9