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Monthly climate in Rosso, Mauritania

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Rosso features a hot desert climate (BWh). Temperatures typically range between 25 °C (77 °F) and 32 °C (89 °F) through the year, but rarely can drop to 14 °C (57 °F) or can rise to as high as 46 °C (115 °F). The average annual precipitation amounts to about 121 mm (4.7 inches) and receives 17 rainy days on the 1 mm (0.04 inches) threshold annually. Rosso enjoys an average of 3753 hours of sunshine throughout the year, and daylight varies from 11 hours 9 minutes to 13 hours 4 minutes per day.

Monthly average temperatures in Rosso, Mauritania

The warmest months in Rosso are June, September and October, with daily mean temperatures ranging from 30 to 32 °C (86 - 89 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 25 to 26 °C (77 - 79 °F) throughout the day. On average each year, Rosso experiences 329 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 Rosso. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum39°C
(102°F)		39°C
(103°F)		44°C
(112°F)		44°C
(111°F)		46°C
(115°F)		45°C
(114°F)		44°C
(112°F)		43°C
(110°F)		43°C
(110°F)		43°C
(109°F)		42°C
(108°F)		38°C
(101°F)
Mean maximum36°C
(98°F)		38°C
(100°F)		41°C
(106°F)		42°C
(108°F)		44°C
(112°F)		44°C
(112°F)		40°C
(104°F)		39°C
(103°F)		40°C
(105°F)		42°C
(108°F)		41°C
(106°F)		37°C
(99°F)
Average high32°C
(91°F)		34°C
(93°F)		36°C
(96°F)		37°C
(99°F)		38°C
(101°F)		38°C
(101°F)		36°C
(96°F)		35°C
(96°F)		36°C
(97°F)		39°C
(102°F)		37°C
(98°F)		33°C
(92°F)
Daily mean25°C
(77°F)		26°C
(79°F)		27°C
(82°F)		29°C
(84°F)		29°C
(84°F)		30°C
(86°F)		29°C
(85°F)		30°C
(86°F)		30°C
(87°F)		32°C
(89°F)		29°C
(85°F)		26°C
(78°F)
Average low18°C
(65°F)		19°C
(67°F)		20°C
(69°F)		22°C
(71°F)		22°C
(72°F)		24°C
(76°F)		25°C
(78°F)		26°C
(79°F)		26°C
(80°F)		26°C
(79°F)		23°C
(73°F)		19°C
(67°F)
Mean minimum15°C
(59°F)		16°C
(61°F)		17°C
(62°F)		17°C
(64°F)		19°C
(66°F)		22°C
(72°F)		23°C
(74°F)		24°C
(76°F)		24°C
(75°F)		22°C
(73°F)		19°C
(66°F)		16°C
(61°F)
Minimum14°C
(57°F)		14°C
(58°F)		16°C
(61°F)		16°C
(61°F)		18°C
(64°F)		20°C
(68°F)		23°C
(73°F)		24°C
(75°F)		23°C
(74°F)		22°C
(71°F)		18°C
(65°F)		15°C
(59°F)

Compare climate in Rosso with other places

Compare temperature, precipitation, sunshine, UV index in Rosso, Mauritania with other places around the world.

Monthly average precipitation in Rosso, Mauritania

Rosso usually has the most precipitation in August, September and October, with an average of 5 rainy days and 36 mm (1.4 inches) of precipitation per month. The driest months in Rosso are January, February and May. On average, 0 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rosso. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)0 (0.0)0 (0.0)1 (0.0)0 (0.0)0 (0.0)3 (0.1)8 (0.3)43 (1.7)54 (2.1)12 (0.5)0 (0.0)0 (0.0)
Average precipitation days (≥ 1 mm)000000168200

Monthly sunshine hours in Rosso, Mauritania

The sunniest months in Rosso are March, May and July, when the sun shines an average of 11 hours 3 minutes a day. Least sunny months in Rosso: January, February and November receive an average of 9 hours 2 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rosso. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours243280334334351329341329310314289293
Mean daily daylight hours11h 15m11h 35m12h 2m12h 30m12h 53m13h 4m12h 58m12h 38m12h 11m11h 44m11h 21m11h 9m

Solar UV radiation in Rosso, Mauritania

Rosso experiences the highest level of ultraviolet (UV) radiation in April, August and September, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure. January, February and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Rosso UV Index data.

Average daily maximum UV levels by month for Rosso. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)9101213131313131412108