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Monthly climate in Guaratuba, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Guaratuba features a humid subtropical climate (Cfa). Temperatures typically range between 18 °C (64 °F) and 26 °C (79 °F) through the year, but rarely can drop to 7 °C (44 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 1715 mm (67.5 inches) and receives 200 rainy days on the 1 mm (0.04 inches) threshold annually. Guaratuba enjoys an average of 3149 hours of sunshine throughout the year, and daylight varies from 10 hours 31 minutes to 13 hours 42 minutes per day.

Monthly average temperatures in Guaratuba, Brazil

The warmest months in Guaratuba are January, February and March, with daily mean temperatures ranging from 25 to 26 °C (77 - 79 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 18 to 19 °C (64 - 67 °F) throughout the day. On average each year, Guaratuba experiences 150 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 Guaratuba. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum36°C
(97°F)		34°C
(94°F)		32°C
(90°F)		32°C
(91°F)		29°C
(84°F)		28°C
(83°F)		29°C
(84°F)		28°C
(82°F)		28°C
(82°F)		31°C
(89°F)		32°C
(89°F)		32°C
(89°F)
Mean maximum33°C
(91°F)		32°C
(90°F)		31°C
(88°F)		30°C
(86°F)		28°C
(82°F)		25°C
(78°F)		26°C
(80°F)		26°C
(80°F)		26°C
(80°F)		29°C
(85°F)		30°C
(86°F)		31°C
(88°F)
Average high29°C
(84°F)		28°C
(83°F)		27°C
(82°F)		26°C
(78°F)		23°C
(74°F)		22°C
(72°F)		21°C
(70°F)		21°C
(70°F)		22°C
(72°F)		24°C
(75°F)		25°C
(77°F)		27°C
(81°F)
Daily mean26°C
(79°F)		25°C
(78°F)		25°C
(77°F)		23°C
(73°F)		21°C
(69°F)		19°C
(67°F)		18°C
(64°F)		18°C
(65°F)		20°C
(68°F)		21°C
(70°F)		22°C
(72°F)		24°C
(76°F)
Average low23°C
(75°F)		23°C
(73°F)		23°C
(73°F)		20°C
(69°F)		18°C
(65°F)		17°C
(62°F)		15°C
(59°F)		16°C
(60°F)		18°C
(64°F)		19°C
(67°F)		20°C
(68°F)		22°C
(72°F)
Mean minimum21°C
(70°F)		20°C
(68°F)		20°C
(68°F)		17°C
(62°F)		13°C
(56°F)		12°C
(54°F)		9°C
(48°F)		10°C
(51°F)		15°C
(59°F)		17°C
(62°F)		17°C
(63°F)		19°C
(67°F)
Minimum19°C
(67°F)		18°C
(65°F)		19°C
(66°F)		14°C
(58°F)		11°C
(52°F)		9°C
(48°F)		7°C
(44°F)		8°C
(46°F)		12°C
(54°F)		16°C
(60°F)		15°C
(60°F)		18°C
(64°F)

Compare climate in Guaratuba with other places

Compare temperature, precipitation, sunshine, UV index in Guaratuba, Brazil with other places around the world.

Monthly average precipitation in Guaratuba, Brazil

Guaratuba usually has the most precipitation in January, February and March, with an average of 21 rainy days and 218 mm (8.6 inches) of precipitation per month. The driest months in Guaratuba are July, August and September. On average, 65 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Guaratuba. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)237 (9.3)213 (8.4)203 (8.0)115 (4.5)127 (5.0)113 (4.5)32 (1.2)72 (2.8)91 (3.6)166 (6.6)153 (6.0)193 (7.6)
Average precipitation days (≥ 1 mm)21202417151271114192020

Monthly sunshine hours in Guaratuba, Brazil

The sunniest months in Guaratuba are March, November and December, when the sun shines an average of 9 hours 51 minutes a day. Least sunny months in Guaratuba: June, August and September receive an average of 7 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Guaratuba. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours242277289281246219255241235241299317
Mean daily daylight hours13h 31m12h 56m12h 11m11h 26m10h 49m10h 31m10h 41m11h 13m11h 56m12h 42m13h 22m13h 42m

Solar UV radiation in Guaratuba, Brazil

Guaratuba experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure. May, June and July are in the High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Guaratuba UV Index data.

Average daily maximum UV levels by month for Guaratuba. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)15141210766810131414