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Vila Nova de Gaia Weather in September
September in Vila Nova de Gaia typically sees daytime highs of 24°C (75°F) and nighttime lows of 16°C (61°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the summer season.
Rainfall in Vila Nova de Gaia in September
Historically, September sees about 9 days of rain, with a monthly average of 66 mm (2.6 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Vila Nova de Gaia in September
September tends to be one of the excellent months in Vila Nova de Gaia, with 24°C (75°F) in the afternoon and 16°C (61°F) overnight. During September, you'll experience the summer season. Overall, the month follows a fairly predictable daily temperature pattern. At 16°C (61°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Vila Nova de Gaia in September
There are approximately 224 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Vila Nova de Gaia in September
Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.
Average water temperature in September
With water at 18°C (64°F), swimming is comfortable for most people. It feels refreshing rather than cold, though it depends a bit on personal preference.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Vila Nova de Gaia Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
24°C (75°F)
Water Temperature
18°C (64°F) *
Chance of Rain
28%
Precipitation
66 mm (2.6 in)
Rainy days
9 days
Humidity
76% *
Windspeed
4 m/s (8 knots) *
Sunshine
224 hours *
Percentage Sunshine
64% *
* Data from: Porto, Portugal (13 KM, 8 Miles).
Vila Nova de Gaia Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Vila Nova de Gaia - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Vila Nova de Gaia typically stay consistent throughout September, with daily highs averaging around 24°C (75°F). Nights are pleasant, with lows typically ranging from 13°C (55°F) to 15°C (59°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Vila Nova de Gaia in September
Browse day-by-day weather records for Vila Nova de Gaia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Vila Nova de Gaia historical weather extremes in September
The extremes listed below come from historical weather data collected in Vila Nova de Gaia from 1976 through 2026.
- On September 12, 1978, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
- Vila Nova de Gaia experienced its chilliest September day on September 19, 2000, reaching only 16°C (61°F).
- Nighttime temperatures dropped to 7°C (45°F) on September 17, 2017, marking the coldest September night on record.
Best Places in Portugal in September
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Vila Nova de Gaia in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 18°C (64°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Vila Nova de Gaia in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling10/10 -
Walking10/10 -
Barbeque8/10 -
Camping8/10 -
Outdoor sports10/10
Vila Nova de Gaia 3-Day Forecast
More climate data for Vila Nova de Gaia
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Vila Nova de Gaia climate overview or explore weather in Portugal.
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