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Monthly climate in San Martin, Argentina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Martin features a cold desert climate (BWk). Temperatures typically range between 8 °C (47 °F) and 27 °C (82 °F) through the year, but rarely can drop to -4 °C (26 °F) or can rise to as high as 42 °C (108 °F). The average annual precipitation amounts to about 220 mm (8.6 inches) and receives 39 rainy days on the 1 mm (0.04 inches) threshold annually. San Martin enjoys an average of 3796 hours of sunshine throughout the year, and daylight varies from 9 hours 59 minutes to 14 hours 17 minutes per day.

Monthly average temperatures in San Martin, Argentina

The warmest months in San Martin are January, February and December, with daily mean temperatures ranging from 25 to 27 °C (78 - 82 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 8 to 12 °C (47 - 54 °F) throughout the day. On average each year, San Martin experiences 172 days above 25 °C (77.0 °F) and 7 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 Martin. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum42°C
(107°F)		41°C
(107°F)		38°C
(101°F)		34°C
(93°F)		27°C
(81°F)		26°C
(79°F)		23°C
(74°F)		32°C
(90°F)		36°C
(97°F)		39°C
(103°F)		40°C
(105°F)		42°C
(108°F)
Mean maximum40°C
(105°F)		39°C
(103°F)		37°C
(98°F)		31°C
(89°F)		25°C
(77°F)		21°C
(70°F)		21°C
(71°F)		28°C
(83°F)		33°C
(92°F)		35°C
(96°F)		38°C
(101°F)		41°C
(106°F)
Average high34°C
(94°F)		32°C
(89°F)		29°C
(85°F)		25°C
(77°F)		19°C
(67°F)		15°C
(60°F)		15°C
(60°F)		19°C
(67°F)		23°C
(74°F)		27°C
(80°F)		31°C
(88°F)		33°C
(92°F)
Daily mean27°C
(82°F)		25°C
(78°F)		23°C
(73°F)		18°C
(66°F)		13°C
(56°F)		9°C
(48°F)		8°C
(47°F)		12°C
(54°F)		16°C
(62°F)		20°C
(68°F)		24°C
(75°F)		26°C
(80°F)
Average low21°C
(70°F)		19°C
(67°F)		16°C
(62°F)		13°C
(55°F)		8°C
(46°F)		4°C
(39°F)		3°C
(37°F)		5°C
(42°F)		10°C
(50°F)		13°C
(56°F)		17°C
(63°F)		19°C
(67°F)
Mean minimum14°C
(58°F)		13°C
(56°F)		10°C
(50°F)		7°C
(44°F)		2°C
(36°F)		-1°C
(30°F)		-2°C
(29°F)		-0°C
(32°F)		3°C
(38°F)		4°C
(39°F)		11°C
(53°F)		13°C
(57°F)
Minimum10°C
(49°F)		13°C
(55°F)		7°C
(44°F)		2°C
(36°F)		0°C
(32°F)		-4°C
(26°F)		-3°C
(27°F)		-2°C
(28°F)		-1°C
(31°F)		2°C
(35°F)		9°C
(48°F)		12°C
(54°F)

Compare climate in San Martin with other places

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

Monthly average precipitation in San Martin, Argentina

San Martin usually has the most precipitation in January, February and November, with an average of 6 rainy days and 34 mm (1.3 inches) of precipitation per month. The driest months in San Martin are June, July and August. On average, 4 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Martin. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)36 (1.4)39 (1.6)26 (1.0)20 (0.8)17 (0.7)5 (0.2)4 (0.2)2 (0.1)6 (0.2)13 (0.5)27 (1.1)24 (1.0)
Average precipitation days (≥ 1 mm)675321101355

Monthly sunshine hours in San Martin, Argentina

The sunniest months in San Martin are October, November and December, when the sun shines an average of 12 hours 6 minutes a day. Least sunny months in San Martin: April, May and June receive an average of 8 hours 51 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Martin. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours310324326275267263279314320353369391
Mean daily daylight hours14h 2m13h 14m12h 14m11h 13m10h 23m9h 59m10h 12m10h 56m11h 54m12h 55m13h 49m14h 17m

Solar UV radiation in San Martin, Argentina

San Martin experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 14 - 15, 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 San Martin UV Index data.

Average daily maximum UV levels by month for San Martin. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151412864468121415