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Monthly climate in Porto, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Porto features a tropical savanna climate (Aw). Temperatures typically range between 27 °C (80 °F) and 30 °C (87 °F) through the year, but rarely can drop to 18 °C (65 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 1561 mm (61.5 inches) and receives 137 rainy days on the 1 mm (0.04 inches) threshold annually. Porto enjoys an average of 3717 hours of sunshine throughout the year, and daylight varies from 11 hours 53 minutes to 12 hours 19 minutes per day.

Monthly average temperatures in Porto, Brazil

The warmest months in Porto are September, October and November, with daily mean temperatures ranging from 30 to 30 °C (86 - 87 °F) throughout the day. The coldest temperatures usually occur in February, March and April, when daily mean temperatures range from 27 to 27 °C (80 - 81 °F) throughout the day. On average each year, Porto 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 Porto. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum38°C
(101°F)		35°C
(95°F)		34°C
(93°F)		34°C
(93°F)		34°C
(94°F)		34°C
(94°F)		35°C
(95°F)		37°C
(98°F)		39°C
(102°F)		39°C
(103°F)		39°C
(103°F)		39°C
(103°F)
Mean maximum36°C
(98°F)		34°C
(94°F)		33°C
(92°F)		33°C
(92°F)		33°C
(92°F)		33°C
(92°F)		34°C
(94°F)		36°C
(97°F)		37°C
(100°F)		39°C
(102°F)		38°C
(101°F)		37°C
(99°F)
Average high33°C
(91°F)		32°C
(89°F)		31°C
(89°F)		31°C
(89°F)		32°C
(89°F)		32°C
(90°F)		33°C
(92°F)		34°C
(94°F)		36°C
(97°F)		37°C
(98°F)		36°C
(96°F)		35°C
(95°F)
Daily mean28°C
(82°F)		27°C
(81°F)		27°C
(80°F)		27°C
(81°F)		27°C
(81°F)		28°C
(82°F)		28°C
(82°F)		29°C
(84°F)		30°C
(86°F)		30°C
(87°F)		30°C
(86°F)		29°C
(85°F)
Average low24°C
(76°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		24°C
(75°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)
Mean minimum23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		22°C
(71°F)		20°C
(68°F)		20°C
(69°F)		22°C
(71°F)		23°C
(74°F)		24°C
(75°F)		23°C
(74°F)
Minimum22°C
(72°F)		22°C
(73°F)		23°C
(73°F)		22°C
(72°F)		22°C
(72°F)		21°C
(70°F)		18°C
(65°F)		19°C
(66°F)		20°C
(68°F)		23°C
(73°F)		23°C
(74°F)		23°C
(73°F)

Compare climate in Porto with other places

Compare temperature, precipitation, sunshine, UV index in Porto, Brazil with other places around the world.

Monthly average precipitation in Porto, Brazil

Porto usually has the most precipitation in February, March and April, with an average of 26 rainy days and 345 mm (13.6 inches) of precipitation per month. The driest months in Porto are August, September and October. On average, 4 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Porto. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)194 (7.6)315 (12.4)409 (16.1)312 (12.3)149 (5.9)22 (0.9)18 (0.7)3 (0.1)2 (0.1)7 (0.3)61 (2.4)69 (2.7)
Average precipitation days (≥ 1 mm)182529251743001510

Monthly sunshine hours in Porto, Brazil

The sunniest months in Porto are August, September and October, when the sun shines an average of 11 hours 19 minutes a day. Least sunny months in Porto: January, February and April receive an average of 8 hours 34 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Porto. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours249249281273318324335346341354328315
Mean daily daylight hours12h 18m12h 12m12h 6m12h 0m11h 55m11h 53m11h 54m11h 58m12h 4m12h 10m12h 16m12h 19m

Solar UV radiation in Porto, Brazil

Porto experiences the highest level of ultraviolet (UV) radiation in January, March and April, when the maximum UV index can reach values of 14 - 16, which corresponds to the Extreme category of sun exposure. June, July and October are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 12. For more detailed information, check out our hourly Porto UV Index data.

Average daily maximum UV levels by month for Porto. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141416151311111313121313