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Monthly climate in Portena, Argentina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Portena features a humid subtropical climate (Cfa). Temperatures typically range between 12 °C (54 °F) and 26 °C (78 °F) through the year, but rarely can drop to -3 °C (28 °F) or can rise to as high as 42 °C (108 °F). The average annual precipitation amounts to about 858 mm (33.8 inches) and receives 74 rainy days on the 1 mm (0.04 inches) threshold annually. Portena enjoys an average of 3569 hours of sunshine throughout the year, and daylight varies from 10 hours 8 minutes to 14 hours 6 minutes per day.

Monthly average temperatures in Portena, Argentina

The warmest months in Portena are January, February and December, with daily mean temperatures ranging from 24 to 26 °C (75 - 78 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 12 to 14 °C (54 - 58 °F) throughout the day. On average each year, Portena experiences 180 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 Portena. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum42°C
(108°F)		39°C
(102°F)		37°C
(100°F)		34°C
(94°F)		31°C
(87°F)		30°C
(85°F)		32°C
(89°F)		35°C
(95°F)		38°C
(101°F)		39°C
(103°F)		40°C
(105°F)		40°C
(105°F)
Mean maximum38°C
(100°F)		36°C
(97°F)		34°C
(94°F)		32°C
(90°F)		28°C
(83°F)		26°C
(78°F)		29°C
(84°F)		32°C
(91°F)		36°C
(97°F)		37°C
(98°F)		38°C
(100°F)		38°C
(101°F)
Average high31°C
(88°F)		30°C
(86°F)		28°C
(83°F)		25°C
(78°F)		21°C
(71°F)		19°C
(66°F)		18°C
(65°F)		22°C
(72°F)		24°C
(76°F)		26°C
(79°F)		29°C
(85°F)		31°C
(88°F)
Daily mean26°C
(78°F)		24°C
(75°F)		22°C
(72°F)		19°C
(67°F)		15°C
(60°F)		13°C
(55°F)		12°C
(54°F)		14°C
(58°F)		17°C
(63°F)		20°C
(68°F)		23°C
(73°F)		25°C
(77°F)
Average low20°C
(68°F)		18°C
(65°F)		17°C
(63°F)		15°C
(59°F)		11°C
(51°F)		8°C
(46°F)		7°C
(44°F)		8°C
(46°F)		11°C
(53°F)		14°C
(57°F)		17°C
(62°F)		18°C
(65°F)
Mean minimum13°C
(56°F)		11°C
(53°F)		11°C
(51°F)		8°C
(46°F)		4°C
(39°F)		-0°C
(32°F)		-2°C
(29°F)		0°C
(32°F)		4°C
(40°F)		6°C
(44°F)		10°C
(51°F)		12°C
(54°F)
Minimum12°C
(54°F)		9°C
(48°F)		9°C
(48°F)		2°C
(37°F)		1°C
(34°F)		-3°C
(28°F)		-3°C
(28°F)		-1°C
(30°F)		3°C
(37°F)		5°C
(41°F)		8°C
(46°F)		9°C
(48°F)

Compare climate in Portena with other places

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

Monthly average precipitation in Portena, Argentina

Portena usually has the most precipitation in January, April and November, with an average of 7 rainy days and 110 mm (4.3 inches) of precipitation per month. The driest months in Portena are June, July and August. On average, 21 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Portena. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)116 (4.6)93 (3.7)94 (3.7)109 (4.3)53 (2.1)20 (0.8)21 (0.8)21 (0.8)32 (1.3)91 (3.6)105 (4.1)102 (4.0)
Average precipitation days (≥ 1 mm)877873434878

Monthly sunshine hours in Portena, Argentina

The sunniest months in Portena are October, November and December, when the sun shines an average of 11 hours 27 minutes a day. Least sunny months in Portena: May, June and July receive an average of 7 hours 52 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Portena. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours295320315273232237253296290328354371
Mean daily daylight hours13h 52m13h 8m12h 13m11h 17m10h 31m10h 8m10h 21m11h 1m11h 54m12h 51m13h 41m14h 6m

Solar UV radiation in Portena, Argentina

Portena 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 Portena UV Index data.

Average daily maximum UV levels by month for Portena. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141312964579121414