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Monthly climate in Rosario, Sonora, Mexico

Last updated: March 2, 2024

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, Sonora, 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, Sonora, Mexico. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 32°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 maximum 31°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 high 25°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 mean 16°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 low 8°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 minimum 3°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, Sonora, Mexico with other places around the world.

Monthly average precipitation in Rosario, Sonora, 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, Sonora, Mexico. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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) 2 3 1 0 0 3 21 16 12 2 2 3

Monthly sunshine hours in Rosario, Sonora, 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, Sonora, Mexico. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 218 247 289 326 366 353 319 309 293 301 263 261
Mean daily daylight hours 10h 35m 11h 12m 12h 1m 12h 50m 13h 31m 13h 51m 13h 40m 13h 4m 12h 16m 11h 27m 10h 44m 10h 23m

Solar UV radiation in Rosario, Sonora, 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, Sonora, Mexico. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 6 8 10 12 12 12 12 12 11 9 7 5

Detailed Monthly Weather Insights for Rosario, Sonora, Mexico

Discover in-depth weather details for every month in Rosario. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Rosario's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.