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Aveiro in January sees moderate daytime temperatures of 15°C (59°F) and nighttime lows of 7°C (45°F). Rainfall is fairly high this month at around 134 mm (5.3 in), so pack a rain jacket to stay dry.
Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Aveiro.
Pick a month to see the average temperature, rainfall and sunshine in Aveiro - and find the best time to visit.
49-year average (1976-2025)
Based on our historical records, temperatures in Aveiro typically stay consistent throughout January, with daily highs averaging around 15°C (59°F). Nights are cold, with lows around 6°C (43°F).
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Aveiro spanning 50 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in Aveiro between 2000 and 2025, these are the recorded extremes during January.
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in January →
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).
The weather can be unpredictable in January, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Sunglasses could come in handy during the sunnier parts of your trip.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Aveiro climate overview or explore weather in Portugal.
Where to go in January - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
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