Monthly climate guide
Aveiro weather in September
Expect warm weather in Aveiro in September: afternoons reach about 26°C (78°F), while nights drop to around 16°C (60°F). Around 48 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are about the same as August and 3°C warmer than October.
What stands out in September
- September brings early autumn to Aveiro.
- Just 50 km apart, but Aveiro runs about 3°C cooler than Coimbra this month.
- Only 2 months are warmer in Aveiro than September.
Avg high
26°C
78°F
Avg low
16°C
60°F
Rainfall
48 mm
fairly dry
Humidity
71%
relative
Sky
35%
cloud · a mix of sun and cloud
Aveiro weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 8°C / 46°F | 116 mm | 86% | 53% |
| February | 14°C / 58°F | 8°C / 46°F | 90 mm | 83% | 49% |
| March | 16°C / 61°F | 9°C / 47°F | 99 mm | 81% | 50% |
| April | 18°C / 64°F | 11°C / 51°F | 98 mm | 81% | 54% |
| May | 21°C / 70°F | 13°C / 55°F | 71 mm | 77% | 45% |
| June | 23°C / 74°F | 14°C / 58°F | 27 mm | 74% | 43% |
| July | 26°C / 79°F | 16°C / 61°F | 8 mm | 73% | 33% |
| August | 26°C / 79°F | 16°C / 61°F | 16 mm | 72% | 31% |
| September | 26°C / 78°F | 16°C / 60°F | 48 mm | 71% | 35% |
| October | 22°C / 72°F | 14°C / 57°F | 109 mm | 75% | 46% |
| November | 17°C / 62°F | 11°C / 51°F | 137 mm | 84% | 52% |
| December | 15°C / 59°F | 9°C / 47°F | 101 mm | 85% | 52% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A small travel umbrella, just in case
- Sunglasses
Is September a good time to visit Aveiro?
Compare the months in the chart above to find your ideal window.
Best time to visit Aveiro →Other Portugal cities in September
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Aveiro weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/portugal/aveiro/september
<a href="https://weathercompare.eu/weather/portugal/aveiro/september">Aveiro weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/portugal/aveiro" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Aveiro weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/portugal/aveiro/september">Aveiro weather in September</a> – WeatherCompare</p>
Aveiro in September: quick answers
Is September a good time to visit Aveiro?
September is a reasonable time for Aveiro: highs around 26°C and about 48 mm of rain, though not one of the three best months.
How warm is Aveiro in September?
Average highs are about 26°C (78°F) and average lows about 16°C (60°F), based on 10 years of daily data.
Does it rain a lot in Aveiro in September?
Aveiro typically gets around 48 mm of rain in September — fairly dry.
Figures are long-term averages for the area around Aveiro (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.