Last updated: January 18, 2025
Situated in the picturesque region of Aveiro, Portugal, the climate is classified under the Köppen-Geiger system as Csb, characterized by a Mediterranean influence with cool, wet winters and warm, dry summers. January brings the coldest temperatures, plunging to a notable minimum of -4°C (25°F), while summer peaks in August can soar to a sweltering 39°C (103°F). Throughout the year, the region enjoys an average temperature of 15°C (60°F), making it a compelling destination for those who appreciate diverse climatic conditions.
Aveiro, Portugal experiences a dynamic temperature pattern throughout the year, showcasing distinct seasonal variations. Winter months, particularly January and February, are marked by chilly lows, averaging around -3°C to -4°C (25°F to 26°F), while daytime highs reach a moderate 21°C to 23°C (70°F to 74°F). As spring approaches, temperatures gradually rise, with March and April featuring milder averages and occasional peaks of 27°C (81°F) and 29°C (84°F), respectively. The onset of summer in May brings a noticeable warmth, with highs climbing to 33°C (92°F) and persisting through July and August, when maximum temperatures can hit 39°C (103°F). As summer transitions to autumn, a gradual cooling occurs, evident in September's still-warm 20°C (68°F) averages, before dipping into the cooler temperatures of October and November, characterized by low averages around 1°C to 3°C (34°F to 37°F). By December, the cycle concludes with a return to winter conditions, reflecting Aveiro's rich climatic tapestry.
Oia experiences a temperature range from a minimum of -2°C (29°F) in January to a maximum of 39°C (102°F) in August, making it one of the warmest spots in summer. In Arrifana, temperatures vary slightly less, with a low of -1°C (31°F) in January and highs reaching 36°C (98°F) in August. Meanwhile, Aveiro is milder, boasting a minimum temperature of 2°C (36°F) in January and a maximum of 33°C (91°F) in July. For more detailed monthly temperatures, visit monthly temperatures in Oia, monthly temperatures in Arrifana, and monthly temperatures in Aveiro.
Aveiro, Portugal experiences a notable precipitation pattern, with the majority of rainfall concentrated in the cooler months. January begins the year with 83 mm (3.3 in) of rain over approximately 7 days, escalating to 125 mm (4.9 in) in February and peaking with 134 mm (5.3 in) in March. The trend continues into April, where precipitation reaches 138 mm (5.4 in), encapsulating spring as a relatively wet season. In stark contrast, May marks the transition to drier conditions, seeing a significant drop to 74 mm (2.9 in), while the summer months of June, July, and August record minimal rainfall, with July and August averaging only 18 mm (0.7 in) and 16 mm (0.6 in) over just 2 days each.
As autumn approaches, precipitation levels begin to rise again, with September receiving 41 mm (1.6 in), followed by October's 110 mm (4.3 in) rainfall. The intensity of rain further escalates in November and December, with 153 mm (6.0 in) and 172 mm (6.8 in) respectively, making these months the wettest of the year while also experiencing around 14 days of rain. This cyclical pattern highlights the region's unique climate, with marked variations between wet and dry seasons, emphasizing the importance of precipitation in shaping Aveiro’s environmental landscape.
In Aveiro, Portugal, sunshine duration exhibits a distinctive seasonal trend, characterized by a gradual increase from the winter months to the vibrant summer season. January starts the year with just 164 hours of sunny weather, which progressively climbs to 213 hours in February. Spring marks a notable shift, as March and April witness a jump to 289 hours and 345 hours, respectively, signaling the arrival of longer days and more consistent sunshine. May continues this upward trajectory, reaching 406 hours, while June mirrors this trend with 407 hours, setting the stage for the sunniest months of the year.
The summer peak is observed in July, where sunlight soars to 425 hours, providing ample opportunity for outdoor activities and making it an ideal time for visitors. However, as the season transitions into late summer and autumn, sunshine hours gradually taper off, with August recording 395 hours and September seeing a decline to 346 hours. By November, sunshine dips to 210 hours, and December concludes the year with only 188 hours, reinforcing the cyclical nature of daylight throughout the year. This pattern not only highlights Aveiro's sunny summers but also underscores the significant variability in sunlight experienced across the seasons.
In Aveiro, Portugal, the UV Index exhibits a pronounced seasonal variation, reflecting the changing intensities of sunlight throughout the year. Beginning with winter, January sees a moderate UV Index of 3, which means sun exposure can lead to skin damage after approximately 30 minutes. As February rolls in, the index rises to 4, maintaining the moderate category. However, with the onset of spring in March, the UV Index climbs significantly, reaching 6—indicating a high exposure risk that necessitates caution with a burn time of just 25 minutes. April and May usher in even more intense sunlight, with the index peaking at 8 and 9, respectively, highlighting the need for protective measures as the burn time reduces to 15 minutes.
The summer months herald the most extreme UV conditions, with June registering a significant 11, placing it in the extreme exposure category. This intensity necessitates urgent precautions, allowing just 10 minutes before potential skin damage occurs. Although July sees a slight decrease to 10, it remains critically high, followed by August at 9 and September at 8, all requiring careful sun protection. As autumn arrives, the UV Index begins to taper off, with October returning to a period of high exposure at 6, and November seeing a drop to 4, where moderate precautions are sufficient. By December, the UV Index decreases to 2, classified as low, thereby extending the safe exposure time to 45 minutes. This clear fluctuation emphasizes the importance of staying sun-aware across various seasons in Aveiro.
UV Risk Categories
In Aveiro, Portugal, daylight duration showcases a clear seasonal pattern, reflecting the shifting position of the sun throughout the year. January and December mark the year's shortest days with 9 hours of daylight, evoking the winter's shorter light periods. As February arrives, daylight gradually increases to 10 hours, continuing the trend into March with 11 hours. April sees a more significant jump to 13 hours, heralding the arrival of spring and longer days, and May reaches 14 hours, establishing a pattern of increasing daylight that culminates in the summer months.
June brings the peak daylight duration of 15 hours, providing ample time for outdoor activities and celebrations. As summer wanes into July and August, daylight slightly decreases but remains substantial at 14 hours and 13 hours, respectively. Fall begins with September's 12 hours, leading to a decline as October offers 11 hours and November returns to 9 hours. This cyclical change in daylight duration not only highlights the diversity of Aveiro's seasons but also serves as an invitation to embrace the outdoors during the sunniest months of the year.
The climate in Arrifana, Portugal, features mild winters and warm summers, with average temperatures ranging from 9°C (48°F) in January to 21°C (69°F) in August. During the summer months, highs can reach up to 36°C (98°F), while winters see low temperatures around -1°C (31°F). Rainfall is heaviest in the winter, particularly in November and December, with monthly precipitation peaking at 194 mm (7.6 in) in December. Sunshine hours are abundant from May to August, with July receiving the most at 427 hours. For more details, visit Arrifana climate.
Aveiro, Portugal, experiences a temperate maritime climate with mild winters and warm summers. January temperatures range from a chilly 2°C (36°F) to a maximum of 20°C (69°F) with significant rainfall, while July sees much warmer conditions, peaking at 33°C (91°F) and minimal precipitation. The city enjoys the most sunshine during summer months, with July averaging 424 hours of sunlight. Overall, the climate is characterized by a distinct wet season from November to March and a dry period during the summer. For more detailed information, visit Aveiro climate.
The climate in Oia, Portugal, features mild winters and hot summers, with average temperatures ranging from 9°C (49°F) in January to 21°C (70°F) in July. Rainfall is most prevalent from October through March, with November receiving the highest precipitation at 133 mm (5.3 in). Summers are generally dry, particularly in July and August, which see minimal rainfall (11 mm and 12 mm, respectively) and abundant sunshine, peaking at 425 hours in July. For more detailed information on Oia's climate, visit Oia climate.
In conclusion, Aveiro, Portugal, exhibits a dynamic climatic profile characterized by distinct seasonal variations in temperature, precipitation, sunshine duration, UV Index, and daylight hours. The region transitions from the chill of winter to the warmth of summer, revealing a remarkable increase in sunshine and daylight that enhances outdoor enjoyment. While the UV Index peaks during the summer months, emphasizing the need for sun protection, the rainfall patterns underscore a period of higher precipitation during the fall and winter. These interrelated climatic factors not only shape the daily life of Aveiro's residents but also make it an attractive destination for visitors year-round, inviting them to experience the unique beauty of this coastal locale across its changing seasons.