Aveiro, Portugal experiences average highs of 20°C (68°F) and lows of 12°C (54°F) throughout the year. Rainfall is moderate, averaging about 9 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Aveiro, Portugal Weather & Climate 2026
Monthly climate averages for Aveiro, Portugal. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.6/10
Best: June, July, August, September
UV Index
5
Low
Temperature 20°C / 12°C
Feels Like 20°C / 11°C
Rainy Days 9
Rainfall 87 mm
Sunshine 10 h
Humidity 78%
Wind Speed 22 km/h
Dew Point 12°C
Hottest Month
28°C
August
Avg Low18°C
Rain2days
Coldest Month
7°C
January
Avg High14°C
Rain12days
Driest Month
2days
July
Avg High28°C
Avg Low17°C
Windiest Month
24 km/h
March (Gusts 40)
Sea Temperature
14°C – 19°C
Warmest water: July (
19.3°C
)
Worst Time to Visit
Consider avoiding January, February, December due to frequent rain.
Sun Position
Sunrise 06:04
Daylight 15.1h
Sunset 21:08
Live conditions—
Aveiro on the map · live conditions
Aveiro, Portugal
- Continent
- Europe
- Country
- Portugal
- City
- Aveiro
- Population
- 80.9K
- Coordinates
- 40.65°, -8.65°
Seasonal Breakdown
Spring
Mar–May
Avg High 19°C
Avg Low 11°C
Rain 11 days/mo
Summer
Jun–Aug
Avg High 26°C
Avg Low 17°C
Rain 3 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 22°C
Avg Low 14°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 15°C
Avg Low 8°C
Rain 12 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 14°C / 7°C . Feb: 16°C / 8°C . Mar: 17°C / 9°C . Apr: 19°C / 11°C . May: 22°C / 13°C . Jun: 24°C / 16°C . Jul: 28°C / 17°C . Aug: 28°C / 18°C . Sep: 25°C / 16°C . Oct: 22°C / 14°C . Nov: 17°C / 11°C . Dec: 15°C / 9°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 128 mm. Feb: 91 mm. Mar: 116 mm. Apr: 111 mm. May: 63 mm. Jun: 34 mm. Jul: 8 mm. Aug: 7 mm. Sep: 47 mm. Oct: 147 mm. Nov: 154 mm. Dec: 140 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 82%. Feb: 79%. Mar: 78%. Apr: 77%. May: 75%. Jun: 76%. Jul: 71%. Aug: 72%. Sep: 75%. Oct: 79%. Nov: 83%. Dec: 84%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 22 km/h . Feb: 22 km/h . Mar: 24 km/h . Apr: 23 km/h . May: 23 km/h . Jun: 22 km/h . Jul: 23 km/h . Aug: 23 km/h . Sep: 21 km/h . Oct: 21 km/h . Nov: 22 km/h . Dec: 22 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 9h. Apr: 11h. May: 12h. Jun: 13h. Jul: 13h. Aug: 12h. Sep: 11h. Oct: 8h. Nov: 7h. Dec: 7h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 14°C . Feb: 14°C . Mar: 15°C . Apr: 16°C . May: 17°C . Jun: 19°C . Jul: 19°C . Aug: 19°C . Sep: 18°C . Oct: 19°C . Nov: 17°C . Dec: 15°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 24 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 29°C | Aug · 28°C |
| Coldest month | Dec 2025 · 8°C | Jan · 7°C |
| Wettest month | Nov 2025 · 336 mm | Nov · 154 mm |
| Windiest month | Jan 2025 · 27 km/h | Mar · 24 km/h |
Month-by-Month Weather Table
January
Fair 
February
Fair March
Good April
Good May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 14°C / 7°C | 12°C / 4°C | 12days (128 mm) Wet | 6.6h Fair | 82% Humid | 2.4 Moderate | Fair | View Details |
| February | 16°C / 8°C | 13°C / 5°C | 10days (91 mm) Wet | 8h Good | 79% Humid | 3.4 Moderate | Fair | View Details |
| March | 17°C / 9°C | 14°C / 6°C | 13days (116 mm) Wet | 9.3h Good | 78% Humid | 4.9 Moderate | Good | View Details |
| April | 19°C / 11°C | 18°C / 9°C | 10days (111 mm) Wet | 10.7h Excellent | 77% Humid | 6.3 High | Good | View Details |
| May | 22°C / 13°C | 22°C / 12°C | 9days (63 mm) Wet | 12h Excellent | 75% Muggy | 7 High | Good | View Details |
| June best | 24°C / 16°C | 24°C / 15°C | 6days (34 mm) Good | 12.8h Excellent | 76% Humid | 7.4 Very High | Excellent | View Details |
| July best | 28°C / 17°C | 28°C / 18°C | 2days (8 mm) Excellent | 13h Excellent | 71% Muggy | 7.6 Very High | Excellent | View Details |
| August best | 28°C / 18°C | 28°C / 18°C | 2days (7 mm) Excellent | 12.2h Excellent | 72% Muggy | 7 High | Excellent | View Details |
| September best | 25°C / 16°C | 25°C / 16°C | 6days (47 mm) Good | 10.6h Excellent | 75% Muggy | 5.8 High | Excellent | View Details |
| October | 22°C / 14°C | 22°C / 13°C | 12days (147 mm) Wet | 8.4h Good | 79% Humid | 3.8 Moderate | Good | View Details |
| November | 17°C / 11°C | 15°C / 8°C | 14days (154 mm) Wet | 7h Good | 83% Humid | 2.8 Moderate | Good | View Details |
| December | 15°C / 9°C | 13°C / 6°C | 14days (140 mm) Wet | 6.5h Fair | 84% Humid | 2.2 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Aveiro are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Aveiro, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Aveiro is August, with average daytime highs of 28°C (82°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Aveiro is January, with average overnight lows of 7°C (45°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Aveiro is November, averaging 154mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Aveiro runs through November, December, March, January, with the heaviest rainfall in November. Based on 10-year averages for Aveiro.
Aveiro receives approximately 117 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Aveiro.
The least favorable months to visit Aveiro are January, February, December, primarily due to frequent rain. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Aveiro is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Aveiro is 78%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 17°C (63°F), which most swimmers will find too cold without a wetsuit.
Average wind speeds in Aveiro are 22 km/h (14 mph). The windiest month is March with peak winds reaching 24 km/h (15 mph) (gusts up to 40 km/h / 25 mph).
Aveiro averages 7 clear-sky days per month with overall cloud cover around 50%. The clearest skies occur in July.
The annual average dew point in Aveiro is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Aveiro has a Hot-Summer Mediterranean climate, classified as Csa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Aveiro ranges from 11°C (52°F) to 20°C (68°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Aveiro. It earns a climate score of 9.3/10 with Excellent.
For June in Aveiro, pack Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 24°C (75°F) and 6 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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