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Best time to visit · Portugal
For the most comfortable weather in Porto, aim for May – September. August tops our comfort score at 98/100, with highs around 76°F (24°C) and 0.9 in (22 mm) of rain. April and October are good shoulder-season months. The toughest months are December & January, mainly because of cloud cover.
Highs run from 55°F to 76°F across the year, and the yearly total is about 39.8 in (1010 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 55°F13°C | 56°F13°C | 59°F15°C | 62°F17°C | 67°F19°C | 72°F22°C | 75°F24°C | 76°F24°C | 74°F23°C | 68°F20°C | 60°F16°C | 56°F14°C |
| Avg low | 46°F8°C | 46°F8°C | 48°F9°C | 51°F10°C | 54°F12°C | 58°F15°C | 60°F16°C | 61°F16°C | 60°F15°C | 57°F14°C | 51°F11°C | 47°F8°C |
| Rain | 5.4 in138 mm | 3.8 in97 mm | 4.4 in112 mm | 3.6 in91 mm | 2.4 in60 mm | 1.3 in32 mm | 0.5 in13 mm | 0.9 in22 mm | 1.9 in49 mm | 5.4 in137 mm | 5.4 in137 mm | 4.8 in122 mm |
| Humidity | 86% | 83% | 81% | 80% | 78% | 76% | 74% | 72% | 73% | 78% | 83% | 85% |
| Cloud | 59% | 52% | 55% | 52% | 46% | 42% | 31% | 31% | 36% | 50% | 53% | 56% |
| Comfort | 63 | 72 | 74 | 83 | 92 | 92 | 97 | 98 | 95 | 82 | 74 | 68 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 76 m (249 ft), close to Porto's own ~93 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs of 55–56°F (13–14°C) and lows down to 46°F (8°C). It's the wettest season, with about 14.1 in (357 mm) of rain, 35% of the year's total. Comfort scores bottom out in December & January; the season averages 68/100.
Temperatures climb through the season, from 59°F highs in March to 67°F by May. About 10.4 in (263 mm) of rain falls across these months, 26% of the year's total. Lows bottom out around 48°F (9°C). Comfort peaks here: May ranks with the year's best, and the season averages 83/100.
Peak warmth: highs of 72–76°F (22–24°C). It's the driest season, with only about 2.6 in (67 mm) of rain, 7% of the year's total. Lows bottom out around 58°F (15°C). June – August are among the best-scoring months (season average 96/100).
Temperatures slide from 74°F highs in September to 60°F by November. About 12.7 in (323 mm) of rain falls across these months, 32% of the year's total. Lows bottom out around 51°F (11°C). Comfort peaks here: September ranks with the year's best, and the season averages 84/100.
By comfort score: 7 Great and 5 Good. Great months: April – October. Tap a month for its own guide.
For the most comfortable weather in Porto, aim for May – September. August tops our comfort score at 98/100, with highs around 76°F (24°C) and 0.9 in (22 mm) of rain. April and October are good shoulder-season months. The toughest months are December & January, mainly because of cloud cover.
January is the wettest month, averaging about 5.4 in (138 mm) of rain. July is the driest, with about 0.5 in (13 mm). The yearly total is around 39.8 in (1010 mm).
February is the coldest, with average lows of 46°F (8°C) and highs of 56°F (13°C). The warmest is August, with average highs of 76°F (24°C).
Not very: summer (June – August) humidity averages 74%, and highs peak around 76°F (24°C), so it rarely feels sticky.
The wettest three-month stretch is November – January, with about 15.6 in (397 mm) of rain combined. The driest stretch is June – August, with about 2.6 in (67 mm).
Poll the group on May – September dates, then plan the days, packing and costs together.
