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Monthly climate in Porto, Castille and León, Spain

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Porto features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 3 °C (38 °F) and 18 °C (64 °F) through the year, but rarely can drop to -8 °C (17 °F) or can rise to as high as 32 °C (89 °F).The average annual precipitation amounts to about 1229 mm (48.4 inches) and receives 140 rainy days on the 1 mm (0.04 inches) threshold annually.Porto enjoys an average of 3657 hours of sunshine throughout the year, and daylight varies from 9 hours 8 minutes to 15 hours 11 minutes per day.

Monthly average temperatures in Porto, Castille and León, Spain §

The warmest months in Porto are July, August and September, with daily mean temperatures ranging from 15 to 18 °C (59 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 5 °C (38 - 41 °F) throughout the day. On average each year, Porto experiences 29 days above 25 °C (77.0 °F) and 53 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, Castille and León, Spain.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 15°C
(60°F)		 19°C
(66°F)		 20°C
(69°F)		 22°C
(71°F)		 27°C
(81°F)		 31°C
(88°F)		 31°C
(88°F)		 32°C
(89°F)		 30°C
(86°F)		 25°C
(78°F)		 17°C
(62°F)		 16°C
(61°F)
Mean maximum 13°C
(56°F)		 16°C
(61°F)		 17°C
(63°F)		 20°C
(69°F)		 25°C
(77°F)		 27°C
(81°F)		 29°C
(85°F)		 31°C
(87°F)		 27°C
(82°F)		 22°C
(73°F)		 16°C
(61°F)		 13°C
(56°F)
Average high 7°C
(46°F)		 10°C
(50°F)		 11°C
(51°F)		 13°C
(56°F)		 18°C
(64°F)		 20°C
(68°F)		 24°C
(75°F)		 24°C
(75°F)		 21°C
(70°F)		 16°C
(62°F)		 10°C
(50°F)		 8°C
(47°F)
Daily mean 3°C
(38°F)		 5°C
(41°F)		 6°C
(43°F)		 9°C
(48°F)		 12°C
(54°F)		 15°C
(59°F)		 18°C
(64°F)		 18°C
(64°F)		 15°C
(59°F)		 11°C
(53°F)		 6°C
(43°F)		 5°C
(41°F)
Average low -0°C
(32°F)		 1°C
(35°F)		 2°C
(35°F)		 4°C
(39°F)		 7°C
(45°F)		 10°C
(50°F)		 12°C
(54°F)		 12°C
(54°F)		 10°C
(50°F)		 7°C
(45°F)		 3°C
(38°F)		 2°C
(36°F)
Mean minimum -5°C
(24°F)		 -4°C
(25°F)		 -4°C
(25°F)		 -3°C
(27°F)		 1°C
(34°F)		 5°C
(42°F)		 7°C
(45°F)		 6°C
(43°F)		 5°C
(41°F)		 0°C
(33°F)		 -2°C
(28°F)		 -3°C
(26°F)
Minimum -8°C
(17°F)		 -7°C
(19°F)		 -7°C
(20°F)		 -5°C
(23°F)		 -1°C
(31°F)		 3°C
(38°F)		 5°C
(41°F)		 4°C
(39°F)		 3°C
(38°F)		 -2°C
(29°F)		 -5°C
(24°F)		 -6°C
(22°F)

Compare climate in Porto with other places

Compare temperature, precipitation, sunshine, UV index in Porto, Castille and León, Spain with other places around the world.

Monthly average precipitation in Porto, Castille and León, Spain §

Porto usually has the most precipitation in March, November and December, with an average of 15 rainy days and 153 mm (6.0 inches) of precipitation per month.The driest months in Porto are July, August and September. On average, 51 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Porto, Castille and León, Spain.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) 80 (3.2) 123 (4.8) 135 (5.3) 120 (4.7) 100 (4.0) 94 (3.7) 49 (1.9) 34 (1.3) 71 (2.8) 99 (3.9) 142 (5.6) 182 (7.2)
Average precipitation days (≥ 1 mm) 9 11 14 16 13 14 7 5 9 11 15 16

Monthly sunshine hours in Porto, Castille and León, Spain §

The sunniest months in Porto are June, July and August, when the sun shines an average of 13 hours 12 minutes a day.Least sunny months in Porto: January, November and December receive an average of 6 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Porto, Castille and León, Spain.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 168 224 292 330 386 387 428 398 339 296 221 182
Mean daily daylight hours 9h 28m 10h 34m 11h 57m 13h 22m 14h 35m 15h 11m 14h 52m 13h 48m 12h 26m 11h 1m 9h 46m 9h 8m

Solar UV radiation in Porto, Castille and León, Spain §

Porto experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Porto UV Index data.

Average daily maximum UV levels by month for Porto, Castille and León, Spain.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) 2 4 6 8 9 11 10 9 8 6 3 2