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 | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 56° | 45° | 12 | 6.4 in | 6.6 h/day | 9.5 h | 38% | 79% |
| February | 58° | 46° | 10 | 4.7 in | 7.9 h/day | 10.6 h | 35% | 78% |
| March | 60° | 47° | 13 | 5.8 in | 9.0 h/day | 11.8 h | 43% | 77% |
| April | 64° | 51° | 12 | 5.3 in | 10.7 h/day | 13.3 h | 41% | 78% |
| May | 68° | 55° | 9 | 3.3 in | 11.8 h/day | 14.5 h | 30% | 77% |
| June | 71° | 59° | 8 | 2.0 in | 13.0 h/day | 15.1 h | 26% | 81% |
| July | 76° | 62° | 3 | 0.5 in | 13.4 h/day | 14.9 h | 10% | 78% |
| August | 76° | 62° | 3 | 0.5 in | 12.1 h/day | 13.8 h | 9% | 77% |
| September | 74° | 60° | 6 | 2.7 in | 10.8 h/day | 12.4 h | 18% | 77% |
| October | 69° | 57° | 13 | 7.2 in | 8.1 h/day | 11.0 h | 42% | 80% |
| November | 62° | 51° | 14 | 6.6 in | 6.8 h/day | 9.8 h | 46% | 82% |
| December | 58° | 48° | 14 | 7.1 in | 6.4 h/day | 9.2 h | 44% | 81% |
Porto month by month
Average high and low for each month, with the bar showing where it sits in Porto's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 12 days
- Sunshine
- 6.6 h
- Daylight
- 9.5 h
February
- Rain
- 10 days
- Sunshine
- 7.9 h
- Daylight
- 10.6 h
March
- Rain
- 13 days
- Sunshine
- 9.0 h
- Daylight
- 11.8 h
April
- Rain
- 12 days
- Sunshine
- 10.7 h
- Daylight
- 13.3 h
May
- Rain
- 9 days
- Sunshine
- 11.8 h
- Daylight
- 14.5 h
June
- Rain
- 8 days
- Sunshine
- 13.0 h
- Daylight
- 15.1 h
July
- Rain
- 3 days
- Sunshine
- 13.4 h
- Daylight
- 14.9 h
August
- Rain
- 3 days
- Sunshine
- 12.1 h
- Daylight
- 13.8 h
September
- Rain
- 6 days
- Sunshine
- 10.8 h
- Daylight
- 12.4 h
October
- Rain
- 13 days
- Sunshine
- 8.1 h
- Daylight
- 11.0 h
November
- Rain
- 14 days
- Sunshine
- 6.8 h
- Daylight
- 9.8 h
December
- Rain
- 14 days
- Sunshine
- 6.4 h
- Daylight
- 9.2 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
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. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.