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Monthly climate in Santo Antao, Portugal

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Santo Antao features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 15 °C (59 °F) and 22 °C (73 °F) through the year, but rarely can drop to 10 °C (50 °F) or can rise to as high as 24 °C (76 °F). The average annual precipitation amounts to about 796 mm (31.3 inches) and receives 118 rainy days on the 1 mm (0.04 inches) threshold annually. Santo Antao enjoys an average of 3369 hours of sunshine throughout the year, and daylight varies from 9 hours 30 minutes to 14 hours 47 minutes per day.

Monthly average temperatures in Santo Antao, Portugal

The warmest months in Santo Antao are July, August and September, with daily mean temperatures ranging from 21 to 22 °C (70 - 73 °F) throughout the day. The coldest temperatures usually occur in February, March and April, when daily mean temperatures range from 15 to 15 °C (59 - 60 °F) throughout the day. On average each year, Santo Antao experiences 0 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 Santo Antao. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum19°C
(66°F)		18°C
(65°F)		18°C
(65°F)		18°C
(65°F)		20°C
(68°F)		22°C
(73°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		22°C
(72°F)		20°C
(68°F)
Mean maximum18°C
(65°F)		18°C
(64°F)		17°C
(63°F)		18°C
(64°F)		19°C
(67°F)		20°C
(69°F)		23°C
(74°F)		24°C
(76°F)		24°C
(75°F)		23°C
(73°F)		21°C
(70°F)		19°C
(67°F)
Average high17°C
(62°F)		16°C
(61°F)		16°C
(61°F)		16°C
(61°F)		17°C
(64°F)		19°C
(67°F)		21°C
(71°F)		23°C
(74°F)		22°C
(73°F)		21°C
(70°F)		19°C
(66°F)		18°C
(64°F)
Daily mean16°C
(61°F)		15°C
(59°F)		15°C
(59°F)		15°C
(60°F)		17°C
(62°F)		19°C
(66°F)		21°C
(70°F)		22°C
(73°F)		22°C
(72°F)		20°C
(69°F)		18°C
(65°F)		17°C
(63°F)
Average low15°C
(60°F)		14°C
(58°F)		14°C
(58°F)		15°C
(59°F)		16°C
(61°F)		18°C
(65°F)		20°C
(69°F)		22°C
(72°F)		21°C
(71°F)		20°C
(68°F)		17°C
(64°F)		16°C
(61°F)
Mean minimum13°C
(56°F)		11°C
(52°F)		12°C
(54°F)		12°C
(54°F)		13°C
(56°F)		15°C
(60°F)		19°C
(66°F)		20°C
(68°F)		20°C
(68°F)		17°C
(62°F)		15°C
(59°F)		13°C
(57°F)
Minimum12°C
(53°F)		10°C
(50°F)		10°C
(51°F)		10°C
(50°F)		12°C
(53°F)		14°C
(57°F)		18°C
(65°F)		19°C
(67°F)		19°C
(66°F)		14°C
(58°F)		13°C
(55°F)		12°C
(54°F)

Compare climate in Santo Antao with other places

Compare temperature, precipitation, sunshine, UV index in Santo Antao, Portugal with other places around the world.

Monthly average precipitation in Santo Antao, Portugal

Santo Antao usually has the most precipitation in January, November and December, with an average of 12 rainy days and 107 mm (4.2 inches) of precipitation per month. The driest months in Santo Antao are June, July and September. On average, 34 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Santo Antao. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)84 (3.3)72 (2.8)47 (1.8)71 (2.8)54 (2.1)41 (1.6)19 (0.8)50 (2.0)43 (1.7)76 (3.0)123 (4.8)116 (4.6)
Average precipitation days (≥ 1 mm)1013912952910121314

Monthly sunshine hours in Santo Antao, Portugal

The sunniest months in Santo Antao are June, July and August, when the sun shines an average of 11 hours 59 minutes a day. Least sunny months in Santo Antao: January, November and December receive an average of 6 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Santo Antao. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours152210265294339356385361321272209200
Mean daily daylight hours9h 48m10h 45m11h 58m13h 13m14h 16m14h 47m14h 31m13h 35m12h 23m11h 8m10h 3m9h 30m

Solar UV radiation in Santo Antao, Portugal

Santo Antao experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Santo Antao UV Index data.

Average daily maximum UV levels by month for Santo Antao. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3579101110109743