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Monthly climate in Arroyito, Argentina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arroyito features a humid subtropical climate (Cfa). Temperatures typically range between 11 °C (52 °F) and 25 °C (78 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 41 °C (107 °F). The average annual precipitation amounts to about 758 mm (29.8 inches) and receives 76 rainy days on the 1 mm (0.04 inches) threshold annually. Arroyito enjoys an average of 3574 hours of sunshine throughout the year, and daylight varies from 10 hours 7 minutes to 14 hours 8 minutes per day.

Monthly average temperatures in Arroyito, Argentina

The warmest months in Arroyito are January, February and December, with daily mean temperatures ranging from 24 to 25 °C (75 - 78 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 11 to 14 °C (52 - 57 °F) throughout the day. On average each year, Arroyito experiences 173 days above 25 °C (77.0 °F) and 4 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Arroyito. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum41°C
(107°F)		38°C
(100°F)		36°C
(97°F)		34°C
(93°F)		29°C
(85°F)		29°C
(84°F)		29°C
(84°F)		33°C
(92°F)		38°C
(100°F)		38°C
(101°F)		38°C
(100°F)		41°C
(106°F)
Mean maximum37°C
(100°F)		36°C
(97°F)		34°C
(93°F)		31°C
(89°F)		28°C
(82°F)		24°C
(75°F)		26°C
(79°F)		31°C
(88°F)		34°C
(93°F)		36°C
(98°F)		37°C
(98°F)		38°C
(101°F)
Average high31°C
(88°F)		30°C
(86°F)		28°C
(82°F)		25°C
(77°F)		21°C
(70°F)		18°C
(65°F)		17°C
(63°F)		21°C
(70°F)		24°C
(75°F)		26°C
(79°F)		29°C
(85°F)		31°C
(88°F)
Daily mean25°C
(78°F)		24°C
(75°F)		22°C
(72°F)		19°C
(67°F)		15°C
(59°F)		12°C
(53°F)		11°C
(52°F)		14°C
(57°F)		17°C
(62°F)		20°C
(68°F)		23°C
(73°F)		25°C
(77°F)
Average low20°C
(68°F)		18°C
(65°F)		17°C
(62°F)		15°C
(59°F)		10°C
(51°F)		7°C
(44°F)		6°C
(43°F)		7°C
(45°F)		11°C
(51°F)		13°C
(56°F)		17°C
(62°F)		18°C
(65°F)
Mean minimum13°C
(56°F)		11°C
(53°F)		10°C
(50°F)		8°C
(46°F)		3°C
(38°F)		-1°C
(31°F)		-2°C
(28°F)		-1°C
(31°F)		3°C
(38°F)		6°C
(42°F)		11°C
(51°F)		12°C
(54°F)
Minimum11°C
(53°F)		9°C
(48°F)		9°C
(48°F)		4°C
(39°F)		1°C
(34°F)		-4°C
(25°F)		-4°C
(25°F)		-3°C
(28°F)		2°C
(35°F)		4°C
(40°F)		10°C
(49°F)		10°C
(50°F)

Compare climate in Arroyito with other places

Compare temperature, precipitation, sunshine, UV index in Arroyito, Argentina with other places around the world.

Monthly average precipitation in Arroyito, Argentina

Arroyito usually has the most precipitation in January, November and December, with an average of 9 rainy days and 101 mm (4.0 inches) of precipitation per month. The driest months in Arroyito are June, July and August. On average, 13 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arroyito. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)99 (3.9)88 (3.5)86 (3.4)92 (3.6)58 (2.3)14 (0.6)14 (0.5)10 (0.4)29 (1.1)65 (2.6)95 (3.7)108 (4.2)
Average precipitation days (≥ 1 mm)999962224699

Monthly sunshine hours in Arroyito, Argentina

The sunniest months in Arroyito are October, November and December, when the sun shines an average of 11 hours 31 minutes a day. Least sunny months in Arroyito: May, June and July receive an average of 8 hours 0 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arroyito. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours297317313258230250255296293324357378
Mean daily daylight hours13h 54m13h 10m12h 13m11h 16m10h 29m10h 7m10h 19m11h 0m11h 54m12h 52m13h 42m14h 8m

Solar UV radiation in Arroyito, Argentina

Arroyito experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure. May, June and July are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Arroyito UV Index data.

Average daily maximum UV levels by month for Arroyito. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141312864569111414