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Monthly climate in San Isidro, Argentina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Isidro 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 1 °C (34 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 896 mm (35.3 inches) and receives 89 rainy days on the 1 mm (0.04 inches) threshold annually. San Isidro enjoys an average of 3395 hours of sunshine throughout the year, and daylight varies from 9 hours 51 minutes to 14 hours 24 minutes per day.

Monthly average temperatures in San Isidro, Argentina

The warmest months in San Isidro are January, February and December, with daily mean temperatures ranging from 23 to 25 °C (73 - 77 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 11 to 12 °C (52 - 55 °F) throughout the day. On average each year, San Isidro experiences 91 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 San Isidro. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum37°C
(99°F)		33°C
(92°F)		32°C
(89°F)		29°C
(84°F)		25°C
(77°F)		23°C
(74°F)		23°C
(74°F)		24°C
(75°F)		27°C
(81°F)		30°C
(87°F)		33°C
(91°F)		34°C
(94°F)
Mean maximum34°C
(93°F)		32°C
(90°F)		30°C
(87°F)		27°C
(81°F)		23°C
(74°F)		19°C
(66°F)		21°C
(70°F)		22°C
(72°F)		25°C
(76°F)		27°C
(81°F)		31°C
(88°F)		32°C
(90°F)
Average high28°C
(83°F)		27°C
(81°F)		25°C
(77°F)		22°C
(72°F)		18°C
(65°F)		15°C
(60°F)		14°C
(57°F)		16°C
(61°F)		18°C
(64°F)		20°C
(69°F)		24°C
(76°F)		26°C
(80°F)
Daily mean25°C
(77°F)		23°C
(75°F)		22°C
(71°F)		19°C
(66°F)		15°C
(59°F)		12°C
(54°F)		11°C
(52°F)		12°C
(55°F)		15°C
(59°F)		17°C
(63°F)		21°C
(69°F)		23°C
(73°F)
Average low21°C
(71°F)		20°C
(68°F)		18°C
(65°F)		16°C
(61°F)		12°C
(54°F)		10°C
(50°F)		8°C
(47°F)		9°C
(49°F)		12°C
(54°F)		14°C
(57°F)		17°C
(63°F)		19°C
(67°F)
Mean minimum15°C
(60°F)		14°C
(57°F)		13°C
(55°F)		11°C
(51°F)		7°C
(44°F)		3°C
(38°F)		2°C
(36°F)		4°C
(39°F)		7°C
(44°F)		8°C
(47°F)		11°C
(52°F)		13°C
(56°F)
Minimum14°C
(58°F)		13°C
(55°F)		10°C
(51°F)		6°C
(44°F)		4°C
(39°F)		1°C
(35°F)		1°C
(34°F)		2°C
(36°F)		3°C
(38°F)		7°C
(45°F)		9°C
(49°F)		10°C
(50°F)

Compare climate in San Isidro with other places

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

Monthly average precipitation in San Isidro, Argentina

San Isidro usually has the most precipitation in April, September and October, with an average of 8 rainy days and 91 mm (3.6 inches) of precipitation per month. The driest months in San Isidro are January, June and August. On average, 59 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Isidro. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)59 (2.3)72 (2.9)77 (3.0)82 (3.2)80 (3.2)66 (2.6)75 (3.0)51 (2.0)86 (3.4)103 (4.1)77 (3.0)66 (2.6)
Average precipitation days (≥ 1 mm)6888788561087

Monthly sunshine hours in San Isidro, Argentina

The sunniest months in San Isidro are February, November and December, when the sun shines an average of 11 hours 36 minutes a day. Least sunny months in San Isidro: May, June and July receive an average of 7 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Isidro. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours298320312259231218210262256301340382
Mean daily daylight hours14h 8m13h 18m12h 14m11h 10m10h 17m9h 51m10h 5m10h 52m11h 53m12h 58m13h 55m14h 24m

Solar UV radiation in San Isidro, Argentina

San Isidro 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 San Isidro UV Index data.

Average daily maximum UV levels by month for San Isidro. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141311754468101314