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Monthly climate in Arroio Grande, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arroio Grande features a humid subtropical climate (Cfa). Temperatures typically range between 13 °C (55 °F) and 24 °C (76 °F) through the year, but rarely can drop to 2 °C (36 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 1246 mm (49.0 inches) and receives 114 rainy days on the 1 mm (0.04 inches) threshold annually. Arroio Grande enjoys an average of 3330 hours of sunshine throughout the year, and daylight varies from 10 hours 3 minutes to 14 hours 12 minutes per day.

Monthly average temperatures in Arroio Grande, Brazil

The warmest months in Arroio Grande are January, February and December, with daily mean temperatures ranging from 22 to 24 °C (72 - 76 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 13 to 14 °C (55 - 57 °F) throughout the day. On average each year, Arroio Grande experiences 124 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 Arroio Grande. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum37°C
(99°F)		35°C
(95°F)		35°C
(95°F)		32°C
(90°F)		29°C
(85°F)		26°C
(78°F)		27°C
(81°F)		30°C
(86°F)		30°C
(86°F)		31°C
(89°F)		34°C
(93°F)		34°C
(94°F)
Mean maximum34°C
(93°F)		33°C
(91°F)		32°C
(90°F)		30°C
(85°F)		27°C
(81°F)		22°C
(72°F)		26°C
(79°F)		27°C
(81°F)		28°C
(82°F)		30°C
(86°F)		32°C
(91°F)		33°C
(91°F)
Average high28°C
(83°F)		28°C
(82°F)		26°C
(80°F)		24°C
(75°F)		20°C
(68°F)		18°C
(64°F)		17°C
(63°F)		18°C
(65°F)		19°C
(67°F)		22°C
(72°F)		25°C
(77°F)		27°C
(81°F)
Daily mean24°C
(76°F)		23°C
(74°F)		22°C
(72°F)		20°C
(68°F)		16°C
(61°F)		14°C
(57°F)		13°C
(55°F)		14°C
(57°F)		16°C
(61°F)		18°C
(64°F)		20°C
(69°F)		22°C
(72°F)
Average low20°C
(69°F)		20°C
(68°F)		18°C
(65°F)		17°C
(62°F)		13°C
(55°F)		11°C
(52°F)		10°C
(49°F)		10°C
(51°F)		13°C
(55°F)		14°C
(58°F)		16°C
(61°F)		18°C
(65°F)
Mean minimum15°C
(60°F)		15°C
(59°F)		14°C
(57°F)		11°C
(53°F)		7°C
(45°F)		4°C
(40°F)		3°C
(37°F)		4°C
(39°F)		7°C
(45°F)		9°C
(48°F)		10°C
(51°F)		13°C
(56°F)
Minimum14°C
(58°F)		13°C
(56°F)		12°C
(54°F)		9°C
(49°F)		5°C
(41°F)		4°C
(39°F)		2°C
(36°F)		2°C
(37°F)		4°C
(40°F)		8°C
(46°F)		9°C
(49°F)		10°C
(51°F)

Compare climate in Arroio Grande with other places

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

Monthly average precipitation in Arroio Grande, Brazil

Arroio Grande usually has the most precipitation in January, September and October, with an average of 11 rainy days and 141 mm (5.5 inches) of precipitation per month. The driest months in Arroio Grande are March, April and December. On average, 75 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arroio Grande. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)135 (5.3)98 (3.9)74 (2.9)79 (3.1)88 (3.5)101 (4.0)112 (4.4)119 (4.7)153 (6.0)135 (5.3)80 (3.1)72 (2.9)
Average precipitation days (≥ 1 mm)11111099998111188

Monthly sunshine hours in Arroio Grande, Brazil

The sunniest months in Arroio Grande are March, November and December, when the sun shines an average of 11 hours 10 minutes a day. Least sunny months in Arroio Grande: June, July and September receive an average of 7 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arroio Grande. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours283315320266237214227242234281334373
Mean daily daylight hours13h 58m13h 12m12h 14m11h 14m10h 26m10h 3m10h 15m10h 58m11h 54m12h 53m13h 46m14h 12m

Solar UV radiation in Arroio Grande, Brazil

Arroio Grande experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure. May, June and July are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Arroio Grande UV Index data.

Average daily maximum UV levels by month for Arroio Grande. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141312854469111314