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Monthly climate in Arroyo Seco, Argentina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arroyo Seco features a humid subtropical climate (Cfa). Temperatures typically range between 11 °C (52 °F) and 25 °C (77 °F) through the year, but rarely can drop to -5 °C (24 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 846 mm (33.3 inches) and receives 75 rainy days on the 1 mm (0.04 inches) threshold annually. Arroyo Seco enjoys an average of 3427 hours of sunshine throughout the year, and daylight varies from 9 hours 58 minutes to 14 hours 17 minutes per day.

Monthly average temperatures in Arroyo Seco, Argentina

The warmest months in Arroyo Seco are January, February and December, with daily mean temperatures ranging from 24 to 25 °C (75 - 77 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 11 to 13 °C (52 - 55 °F) throughout the day. On average each year, Arroyo Seco experiences 151 days above 25 °C (77.0 °F) and 3 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Arroyo Seco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum41°C
(106°F)		37°C
(99°F)		35°C
(95°F)		33°C
(91°F)		29°C
(84°F)		26°C
(79°F)		27°C
(81°F)		30°C
(87°F)		33°C
(91°F)		37°C
(99°F)		36°C
(98°F)		39°C
(102°F)
Mean maximum36°C
(98°F)		35°C
(96°F)		33°C
(92°F)		31°C
(87°F)		26°C
(80°F)		22°C
(72°F)		25°C
(77°F)		28°C
(82°F)		31°C
(88°F)		33°C
(92°F)		35°C
(96°F)		36°C
(97°F)
Average high30°C
(87°F)		29°C
(85°F)		27°C
(81°F)		25°C
(76°F)		20°C
(68°F)		17°C
(63°F)		16°C
(61°F)		19°C
(67°F)		21°C
(71°F)		24°C
(75°F)		28°C
(82°F)		30°C
(86°F)
Daily mean25°C
(77°F)		24°C
(75°F)		21°C
(71°F)		19°C
(66°F)		14°C
(58°F)		12°C
(53°F)		11°C
(52°F)		13°C
(55°F)		15°C
(60°F)		18°C
(64°F)		22°C
(71°F)		24°C
(75°F)
Average low20°C
(67°F)		18°C
(65°F)		16°C
(62°F)		14°C
(57°F)		10°C
(50°F)		7°C
(46°F)		6°C
(43°F)		7°C
(45°F)		10°C
(50°F)		12°C
(54°F)		15°C
(60°F)		18°C
(64°F)
Mean minimum13°C
(55°F)		11°C
(52°F)		9°C
(48°F)		6°C
(44°F)		3°C
(37°F)		-0°C
(32°F)		-2°C
(29°F)		-0°C
(32°F)		3°C
(38°F)		6°C
(43°F)		9°C
(48°F)		11°C
(53°F)
Minimum11°C
(53°F)		9°C
(49°F)		7°C
(45°F)		3°C
(38°F)		-1°C
(31°F)		-2°C
(28°F)		-5°C
(24°F)		-2°C
(29°F)		-1°C
(30°F)		5°C
(41°F)		7°C
(46°F)		10°C
(50°F)

Compare climate in Arroyo Seco with other places

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

Monthly average precipitation in Arroyo Seco, Argentina

Arroyo Seco usually has the most precipitation in January, March and April, with an average of 6 rainy days and 109 mm (4.3 inches) of precipitation per month. The driest months in Arroyo Seco are June, July and August. On average, 32 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arroyo Seco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)108 (4.3)74 (2.9)91 (3.6)127 (5.0)70 (2.8)28 (1.1)30 (1.2)37 (1.5)66 (2.6)67 (2.6)74 (2.9)73 (2.9)
Average precipitation days (≥ 1 mm)865773656877

Monthly sunshine hours in Arroyo Seco, Argentina

The sunniest months in Arroyo Seco are February, November and December, when the sun shines an average of 11 hours 36 minutes a day. Least sunny months in Arroyo Seco: May, June and July receive an average of 7 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arroyo Seco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours292324312260228218222274269304342377
Mean daily daylight hours14h 2m13h 14m12h 14m11h 13m10h 22m9h 58m10h 11m10h 55m11h 54m12h 55m13h 49m14h 17m

Solar UV radiation in Arroyo Seco, Argentina

Arroyo Seco 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 Arroyo Seco UV Index data.

Average daily maximum UV levels by month for Arroyo Seco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141311854468111314