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Monthly climate in La Rioja, Argentina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification La Rioja features a hot semi-arid climate (BSh). Temperatures typically range between 11 °C (51 °F) and 27 °C (82 °F) through the year, but rarely can drop to -2 °C (29 °F) or can rise to as high as 42 °C (108 °F). The average annual precipitation amounts to about 467 mm (18.4 inches) and receives 59 rainy days on the 1 mm (0.04 inches) threshold annually. La Rioja enjoys an average of 3771 hours of sunshine throughout the year, and daylight varies from 10 hours 16 minutes to 13 hours 58 minutes per day.

Monthly average temperatures in La Rioja, Argentina

The warmest months in La Rioja 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 11 to 14 °C (51 - 58 °F) throughout the day. On average each year, La Rioja experiences 182 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in La Rioja. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum41°C
(107°F)		40°C
(104°F)		38°C
(100°F)		34°C
(93°F)		28°C
(83°F)		24°C
(76°F)		25°C
(78°F)		35°C
(95°F)		38°C
(100°F)		40°C
(104°F)		41°C
(106°F)		42°C
(108°F)
Mean maximum40°C
(105°F)		38°C
(101°F)		36°C
(97°F)		31°C
(89°F)		27°C
(80°F)		21°C
(70°F)		24°C
(75°F)		30°C
(87°F)		34°C
(94°F)		39°C
(102°F)		39°C
(102°F)		40°C
(105°F)
Average high33°C
(92°F)		31°C
(88°F)		29°C
(84°F)		26°C
(78°F)		21°C
(70°F)		17°C
(63°F)		17°C
(63°F)		21°C
(71°F)		25°C
(77°F)		28°C
(83°F)		31°C
(88°F)		32°C
(91°F)
Daily mean27°C
(82°F)		25°C
(78°F)		23°C
(74°F)		20°C
(69°F)		15°C
(60°F)		11°C
(52°F)		11°C
(51°F)		14°C
(58°F)		18°C
(65°F)		22°C
(72°F)		25°C
(77°F)		27°C
(80°F)
Average low22°C
(72°F)		21°C
(69°F)		19°C
(66°F)		16°C
(61°F)		11°C
(51°F)		6°C
(43°F)		5°C
(41°F)		7°C
(45°F)		12°C
(53°F)		16°C
(60°F)		19°C
(67°F)		21°C
(70°F)
Mean minimum17°C
(64°F)		16°C
(60°F)		13°C
(56°F)		10°C
(51°F)		4°C
(39°F)		1°C
(34°F)		-1°C
(31°F)		2°C
(35°F)		4°C
(40°F)		8°C
(47°F)		13°C
(56°F)		15°C
(60°F)
Minimum15°C
(58°F)		14°C
(57°F)		10°C
(51°F)		7°C
(45°F)		2°C
(36°F)		-1°C
(31°F)		-2°C
(29°F)		0°C
(33°F)		2°C
(35°F)		7°C
(45°F)		11°C
(52°F)		12°C
(54°F)

Compare climate in La Rioja with other places

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

Monthly average precipitation in La Rioja, Argentina

La Rioja usually has the most precipitation in February, March and December, with an average of 7 rainy days and 74 mm (2.9 inches) of precipitation per month. The driest months in La Rioja are June, July and August. On average, 6 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in La Rioja. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)71 (2.8)72 (2.9)73 (2.9)33 (1.3)23 (0.9)11 (0.4)5 (0.2)2 (0.1)20 (0.8)34 (1.3)46 (1.8)77 (3.0)
Average precipitation days (≥ 1 mm)888652103567

Monthly sunshine hours in La Rioja, Argentina

The sunniest months in La Rioja are October, November and December, when the sun shines an average of 11 hours 41 minutes a day. Least sunny months in La Rioja: April, May and June receive an average of 9 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in La Rioja. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours292304320282277276300319323343358372
Mean daily daylight hours13h 46m13h 4m12h 12m11h 20m10h 37m10h 16m10h 27m11h 5m11h 55m12h 48m13h 35m13h 58m

Solar UV radiation in La Rioja, Argentina

La Rioja 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 La Rioja UV Index data.

Average daily maximum UV levels by month for La Rioja. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151412965579121415