Arcos de Valdevez Weather in September
During September, Arcos de Valdevez experiences high daytime temperatures of 24°C (75°F) and cooler nights around 13°C (55°F). As part of the summer season, expect quite a bit of rainfall. Around 102 mm (4 in) is typical.
Rainfall in Arcos de Valdevez in September
Rain is expected on roughly 10 days, totalling around 102 mm (4 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Arcos de Valdevez in September
If you're visiting Arcos de Valdevez in September, expect highs of 24°C (75°F) and overnight lows around 13°C (55°F). Experience the summer season in September. This kind of day-to-night contrast is typical for this time of year. Nights drop to around 13°C (55°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Arcos de Valdevez in September
The city usually sees around 230 hours of sunlight, indicating many sunny days — a great month for sightseeing.If your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Arcos de Valdevez.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Arcos de Valdevez's climate page.
Arcos de Valdevez Temperature in September
Min Temperature
13°C (55°F)
Max Temperature
24°C (75°F)
Chance of Rain
34%
Precipitation
102 mm (4 in)
Rainy days
10 days
Humidity
74% *
Sunshine
230 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Arcos de Valdevez typically stay consistent throughout September, with daily highs averaging around 24°C (75°F). Nights are cool, 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 for Arcos de Valdevez in September
Browse day-by-day weather records for Arcos de Valdevez spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Arcos de Valdevez historical weather extremes in September
According to our 49 years of weather records for Arcos de Valdevez, the following extremes were recorded between 1976 and 2025.
- The hottest September day on record in Arcos de Valdevez reached 36°C (97°F) (September 6, 1988).
- On September 26, 1992, Arcos de Valdevez saw its coldest September day with temperatures maxing out at 15°C (59°F).
- Nighttime temperatures dropped to 7°C (45°F) on September 30, 1993, 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 →
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What to Wear in Arcos de Valdevez 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. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Arcos de Valdevez in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Arcos de Valdevez's climate page.
Temperature Rainfall Sunshine Humidity
See the full Arcos de Valdevez climate overview or explore weather in Portugal.
