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Monthly climate in Rosario, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Rosario features a hot semi-arid climate (BSh). Temperatures typically range between 16 °C (61 °F) and 30 °C (86 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 44 °C (112 °F). The average annual precipitation amounts to about 553 mm (21.8 inches) and receives 65 rainy days on the 1 mm (0.04 inches) threshold annually. Rosario enjoys an average of 3550 hours of sunshine throughout the year, and daylight varies from 10 hours 23 minutes to 13 hours 51 minutes per day.

Monthly average temperatures in Rosario, Mexico

The warmest months in Rosario are June, July and August, with daily mean temperatures ranging from 28 to 30 °C (82 - 86 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 16 to 17 °C (61 - 63 °F) throughout the day. On average each year, Rosario experiences 288 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 Rosario. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum32°C
(90°F)		34°C
(93°F)		36°C
(96°F)		39°C
(103°F)		41°C
(107°F)		44°C
(112°F)		41°C
(105°F)		40°C
(104°F)		40°C
(104°F)		40°C
(104°F)		38°C
(101°F)		31°C
(88°F)
Mean maximum31°C
(87°F)		31°C
(89°F)		35°C
(95°F)		38°C
(101°F)		39°C
(103°F)		42°C
(107°F)		39°C
(102°F)		38°C
(100°F)		37°C
(99°F)		38°C
(100°F)		35°C
(95°F)		30°C
(87°F)
Average high25°C
(77°F)		26°C
(78°F)		29°C
(84°F)		33°C
(91°F)		35°C
(96°F)		38°C
(100°F)		34°C
(94°F)		34°C
(93°F)		33°C
(92°F)		33°C
(92°F)		30°C
(86°F)		25°C
(77°F)
Daily mean16°C
(61°F)		17°C
(63°F)		20°C
(68°F)		24°C
(75°F)		27°C
(80°F)		30°C
(86°F)		28°C
(83°F)		28°C
(82°F)		27°C
(81°F)		25°C
(78°F)		21°C
(70°F)		17°C
(62°F)
Average low8°C
(47°F)		9°C
(49°F)		11°C
(53°F)		14°C
(58°F)		17°C
(63°F)		23°C
(73°F)		23°C
(74°F)		23°C
(74°F)		22°C
(72°F)		18°C
(65°F)		13°C
(56°F)		10°C
(49°F)
Mean minimum3°C
(38°F)		5°C
(40°F)		6°C
(43°F)		9°C
(49°F)		13°C
(55°F)		18°C
(65°F)		21°C
(70°F)		21°C
(70°F)		19°C
(66°F)		12°C
(53°F)		9°C
(48°F)		4°C
(40°F)
Minimum-0°C
(32°F)		0°C
(33°F)		4°C
(40°F)		8°C
(46°F)		10°C
(50°F)		16°C
(61°F)		20°C
(69°F)		20°C
(68°F)		15°C
(60°F)		6°C
(44°F)		6°C
(43°F)		0°C
(33°F)

Compare climate in Rosario with other places

Compare temperature, precipitation, sunshine, UV index in Rosario, Mexico with other places around the world.

Monthly average precipitation in Rosario, Mexico

Rosario usually has the most precipitation in July, August and September, with an average of 16 rainy days and 117 mm (4.6 inches) of precipitation per month. The driest months in Rosario are March, April and May. On average, 6 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rosario. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)27 (1.1)23 (0.9)18 (0.7)1 (0.0)1 (0.0)33 (1.3)135 (5.3)124 (4.9)92 (3.6)25 (1.0)41 (1.6)33 (1.3)
Average precipitation days (≥ 1 mm)231003211612223

Monthly sunshine hours in Rosario, Mexico

The sunniest months in Rosario are April, May and June, when the sun shines an average of 11 hours 30 minutes a day. Least sunny months in Rosario: January, February and December receive an average of 7 hours 59 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rosario. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours218247289326366353319309293301263261
Mean daily daylight hours10h 35m11h 12m12h 1m12h 50m13h 31m13h 51m13h 40m13h 4m12h 16m11h 27m10h 44m10h 23m

Solar UV radiation in Rosario, Mexico

Rosario experiences the highest level of ultraviolet (UV) radiation in April, May and August, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Rosario UV Index data.

Average daily maximum UV levels by month for Rosario. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)6810121212121211975