Porto, Portugal Climate & Monthly Averages
The climate of Porto
Porto runs on a dry-summer rhythm: the warmest months are also the driest. July averages 13 mm (0.5 in) while the wet season peaks in October at 7.2 inches (183 mm). Highs range from 56°F (14°C) to 76°F (24°C).
Climate quick facts
- Hottest month: July - highs near 76°F (24°C)
- Coldest month: January - highs near 56°F (14°C)
- Decade extremes (2015-2024): 99°F (37°C) high · 32°F (0°C) low
- Wettest month: October (13 rainy days) · Sunniest: July (13.4 h sun/day)
- Climate type: oceanic
- Annual swing: 10°C between the average warmest and coolest month · day to night: 7°C
- Average humidity: 79%
Temperatures through the year
2 months average under 20 mm of rain, the longest unbroken stretch running July through August. At its warmest, in July, Porto runs to 76°F (24°C) in the afternoon and back to 62°F (17°C) by dawn. January is the coolest month, with highs of 56°F (14°C) and lows near 45°F (7°C). Relative humidity averages 79% across the year, more humid than roughly 80% of the cities we track.
Rain, sun and snow
Five of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is May through September. Precipitation concentrates in October - 7.2 inches (183 mm) on 13 days - and thins out by July. Sunshine averages 9.7 hours a day over the year, peaking in July at 13.4 hours. The gridded 2015-2024 daily record for this location tops out at 99°F (37°C) and bottoms at 32°F (0°C) - decade extremes, not all-time station records.
How Porto compares
- Porto sits close to the middle of our dataset on most measures: 59°F (15°C) as an annual average, 52.1 inches (1323 mm) of precipitation and 9.7 hours of sun a day.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 56° | 45° | 12 | 6.4 in | 6.6 h/day | 79% |
| February | 58° | 46° | 10 | 4.7 in | 7.9 h/day | 78% |
| March | 60° | 47° | 13 | 5.8 in | 9.0 h/day | 77% |
| April | 64° | 51° | 12 | 5.3 in | 10.7 h/day | 78% |
| May | 68° | 55° | 9 | 3.3 in | 11.8 h/day | 77% |
| June | 71° | 59° | 8 | 2.0 in | 13.0 h/day | 81% |
| July | 76° | 62° | 3 | 0.5 in | 13.4 h/day | 78% |
| August | 76° | 62° | 3 | 0.5 in | 12.1 h/day | 77% |
| September | 74° | 60° | 6 | 2.7 in | 10.8 h/day | 77% |
| October | 69° | 57° | 13 | 7.2 in | 8.1 h/day | 80% |
| November | 62° | 51° | 14 | 6.6 in | 6.8 h/day | 82% |
| December | 58° | 48° | 14 | 7.1 in | 6.4 h/day | 81% |
Porto month by month
Porto weather in January
January brings highs around 56°F (14°C), lows near 45°F (7°C), about 12 wet days - typically the coldest month of the year in Porto.
Porto weather in February
February brings highs around 58°F (15°C), lows near 46°F (8°C), about 10 wet days.
Porto weather in March
March brings highs around 60°F (16°C), lows near 47°F (9°C), about 13 wet days.
Porto weather in April
April brings highs around 64°F (18°C), lows near 51°F (10°C), about 12 wet days.
Porto weather in May
May brings highs around 68°F (20°C), lows near 55°F (13°C), about 9 wet days.
Porto weather in June
June brings highs around 71°F (22°C), lows near 59°F (15°C), about 8 wet days.
Porto weather in July
July brings highs around 76°F (24°C), lows near 62°F (17°C), about 3 wet days - typically the hottest month and the driest month and the sunniest month of the year in Porto.
Porto weather in August
August brings highs around 76°F (25°C), lows near 62°F (17°C), about 3 wet days.
Porto weather in September
September brings highs around 74°F (24°C), lows near 60°F (16°C), about 6 wet days.
Porto weather in October
October brings highs around 69°F (21°C), lows near 57°F (14°C), about 13 wet days - typically the wettest month of the year in Porto.
Porto weather in November
November brings highs around 62°F (17°C), lows near 51°F (11°C), about 14 wet days.
Porto weather in December
December brings highs around 58°F (15°C), lows near 48°F (9°C), about 14 wet days.
Seasons in Porto
Spring (March through May)
Spring runs cool rather than cold here - highs near 64°F (18°C), nights near 51°F (11°C), and rain falls on around 35 of the 90 days. Daylight is generous - around 10.5 hours of sun a day.
Summer (June through August)
Summer settles into easy warmth here - highs near 75°F (24°C), nights near 61°F (16°C), and rain comes on about 14 days over the three months. Daylight is generous - around 12.8 hours of sun a day.
Fall (September through November)
Fall in Porto settles into easy warmth, with daytime highs averaging 68°F (20°C) and nights around 56°F (13°C); rain falls on around 32 of the 90 days.
Winter (December through February)
Winter stays on the cool side of mild here - highs near 58°F (14°C), nights near 46°F (8°C), and rain falls on around 35 of the 90 days.
Climate questions, answered
What is the average temperature in Porto?
Is Porto hot in summer?
How cold does Porto get in winter?
Which months are driest in Porto?
Best time to visit Porto
The best time to visit Porto is generally June to September, when the dry season is running but the afternoons are still bearable. Daytime temperatures in that window sit near 74°F (24°C), with rain on about 5 days a month. For the same question asked the other way round, see where else is warm in June.
Pack for Porto with a warm jacket and layers for the cooler season and a compact umbrella or rain shell. Even in July, lows of 62°F (17°C) make an extra layer worth the space.
Porto temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.