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Monthly climate in Arinos, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arinos features a tropical savanna climate (Aw). Temperatures typically range between 22 °C (72 °F) and 28 °C (83 °F) through the year, but rarely can drop to 8 °C (47 °F) or can rise to as high as 40 °C (105 °F). The average annual precipitation amounts to about 921 mm (36.3 inches) and receives 101 rainy days on the 1 mm (0.04 inches) threshold annually. Arinos enjoys an average of 3646 hours of sunshine throughout the year, and daylight varies from 11 hours 10 minutes to 13 hours 2 minutes per day.

Monthly average temperatures in Arinos, Brazil

The warmest months in Arinos are January, September and October, with daily mean temperatures ranging from 26 to 28 °C (80 - 83 °F) throughout the day. The coldest temperatures usually occur in May, June and July, when daily mean temperatures range from 22 to 24 °C (72 - 75 °F) throughout the day. On average each year, Arinos experiences 323 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 Arinos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum38°C
(100°F)		37°C
(99°F)		35°C
(96°F)		34°C
(93°F)		34°C
(93°F)		33°C
(93°F)		34°C
(93°F)		35°C
(95°F)		39°C
(102°F)		40°C
(105°F)		39°C
(103°F)		35°C
(96°F)
Mean maximum35°C
(96°F)		34°C
(93°F)		34°C
(93°F)		33°C
(92°F)		33°C
(91°F)		32°C
(90°F)		32°C
(90°F)		34°C
(94°F)		38°C
(101°F)		39°C
(103°F)		35°C
(95°F)		34°C
(94°F)
Average high31°C
(89°F)		30°C
(86°F)		31°C
(87°F)		30°C
(87°F)		30°C
(85°F)		29°C
(85°F)		29°C
(84°F)		31°C
(88°F)		34°C
(93°F)		34°C
(94°F)		30°C
(87°F)		30°C
(87°F)
Daily mean26°C
(80°F)		25°C
(78°F)		26°C
(78°F)		25°C
(78°F)		24°C
(75°F)		23°C
(74°F)		22°C
(72°F)		24°C
(76°F)		27°C
(80°F)		28°C
(83°F)		25°C
(78°F)		25°C
(78°F)
Average low22°C
(71°F)		22°C
(71°F)		21°C
(70°F)		20°C
(69°F)		18°C
(65°F)		17°C
(63°F)		15°C
(60°F)		17°C
(63°F)		19°C
(67°F)		22°C
(72°F)		21°C
(71°F)		21°C
(71°F)
Mean minimum19°C
(67°F)		20°C
(68°F)		19°C
(67°F)		17°C
(64°F)		14°C
(57°F)		14°C
(58°F)		13°C
(55°F)		14°C
(57°F)		16°C
(61°F)		20°C
(67°F)		19°C
(67°F)		19°C
(66°F)
Minimum18°C
(64°F)		19°C
(67°F)		18°C
(65°F)		15°C
(59°F)		8°C
(47°F)		12°C
(54°F)		12°C
(53°F)		12°C
(54°F)		15°C
(58°F)		19°C
(66°F)		18°C
(66°F)		18°C
(65°F)

Compare climate in Arinos with other places

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

Monthly average precipitation in Arinos, Brazil

Arinos usually has the most precipitation in February, November and December, with an average of 17 rainy days and 181 mm (7.1 inches) of precipitation per month. The driest months in Arinos are June, July and September. On average, 1 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arinos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)92 (3.6)169 (6.6)141 (5.5)53 (2.1)15 (0.6)1 (0.0)0 (0.0)6 (0.2)3 (0.1)71 (2.8)153 (6.0)220 (8.7)
Average precipitation days (≥ 1 mm)1018141130000101718

Monthly sunshine hours in Arinos, Brazil

The sunniest months in Arinos are August, September and October, when the sun shines an average of 10 hours 47 minutes a day. Least sunny months in Arinos: January, February and November receive an average of 8 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arinos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours274264301304313313323331335325267291
Mean daily daylight hours12h 56m12h 35m12h 9m11h 42m11h 21m11h 10m11h 16m11h 35m12h 0m12h 27m12h 50m13h 2m

Solar UV radiation in Arinos, Brazil

Arinos experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 15 - 17, which corresponds to the Extreme category of sun exposure. May, June and July are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Arinos UV Index data.

Average daily maximum UV levels by month for Arinos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1715141310991213141516