Last updated: February 24, 2025
Oia, Portugal, in September, offers a delightful mix of warm temperatures and comfortable conditions for visitors. With maximum highs reaching 36°C (97°F) and an average temperature of 20°C (69°F), the days are perfect for enjoying the scenic views. However, evenings can cool down to a pleasant 10°C (50°F). While the month sees 37 mm (1.4 in) of rain over a mere 4 days, the relative humidity averages around 71%, contributing to the lush landscapes. This vibrant blend of warmth and occasional rain makes September an ideal time to experience the charm of Oia.
In September, Oia, Portugal, experiences a delightful transition into autumn with temperatures that showcase a perfect blend of warmth and mildness. The minimum temperature hovers around 10°C (50°F), while the average settles at a comfortable 20°C (69°F), making it an ideal time for outdoor activities. As summer's heat gradually wanes, the maximum reaches a still-warm 36°C (97°F), ensuring plenty of sun-soaked days for those looking to enjoy the last vestiges of summer warmth. This gentle shift in temperatures invites visitors to bask in the beautiful scenery without the intense heat of July and August, creating a perfect environment for exploration and relaxation.
In September, Oia, Portugal, experiences a noticeable shift in precipitation as summer transitions to autumn. With 37 mm (1.4 inches) of rain spread over approximately 4 days, this month marks a slight increase from the drier summer months of July and August, which recorded only 11 mm (0.4 in) and 12 mm (0.5 in), respectively. The early autumn rains serve as a precursor to the more substantial downpours seen in October and November, where averages surge past 90 mm. This gradual uptick in precipitation not only refreshes the landscape but also sets the stage for the lush greenery that will flourish in the fall. Overall, September provides a gentle reminder of the seasonal shift while still offering plenty of sunshine for visitors to enjoy the beauty of Oia.
In Oia, Portugal, the humidity levels show a distinct trend throughout the year, providing character to its charming landscape. Starting the year with high humidity in January at 87%, the numbers gradually decline as spring approaches, reaching their lowest point in July at 63%. As summer fades, the humidity begins to rise again, slightly increasing to 71% in September. This fluctuation indicates a transition period as the island shifts from warm summer days to the cooler autumn months. Following September, humidity climbs once more, returning to 79% by October, suggesting a refreshing end to the summer heat and an inviting environment for fall visitors.
In September, Oia, Portugal, experiences a very high UV Index of 8, suggesting that sun exposure should be approached with caution. This month marks a slight dip from the extreme levels of summer, where June peaked at 11. With a burn time of just 15 minutes, it's essential for visitors to take protective measures, such as wearing sunscreen and seeking shade during peak hours. As the season transitions into autumn, the UV Index gradually declines, hinting at a more forgiving environment for outdoor activities. Overall, September continues to emphasize the importance of sun safety while still offering beautiful days under the sun. For more detailed insights, check out the Oia UV Index.
UV Risk Categories
As summer wanes, September in Oia, Portugal, offers a delightful transition marked by 345 hours of sunshine. This month sees a gentle decline from the peak of July, where the sun graced the island with 425 hours, and August's 395 hours of warmth. The sunlight in September creates an inviting ambiance, perfect for soaking in the beauty of Oia's iconic whitewashed buildings against the backdrop of the Aegean Sea. With the clamoring crowds of summer dissipating, travelers can relish the lingering warmth, making it an ideal time for exploration and relaxation before the cooler days of October, which still boasts a respectable 306 hours of sun. The changing sunlight serves as a reminder of nature's rhythm, offering both a serene end to summer and a vibrant welcome to the autumn months.
In Oia, Portugal, September offers a decent chance of sunshine, with about 45% likelihood of clear skies. Although this marks a slight dip from the summer peak in August, when the sun graced the island 65% of the time, it remains significantly higher than the earlier months of the year. As summer fades and autumn approaches, the sun begins to play hide and seek, aligning with a gradual decline from the sunniest months of June through August. Visitors can still enjoy pleasant weather, but should be prepared for the possibility of more variable conditions as they embrace the transition into fall.
In Oia, Portugal, the rhythm of daylight throughout the year showcases a beautiful cycle, peaking in the summer months. From January to May, there's a steady increase in daylight hours, leading up to a delightful 15 hours in June—perfect for exploring the stunning landscapes and charming architecture. As summer wanes, daylight begins to decline, gently transitioning from 14 hours in July to 12 hours in September. This gradual decrease hints at the approaching autumn, yet the sun-kissed days of September still offer ample time for unforgettable experiences along the coastline. By October, daylight continues to recede, settling at 11 hours, before giving way to the shorter, cozier days of winter. The overall trend reveals a dynamic interplay between seasons, inviting visitors to enjoy Oia’s splendor throughout the year.
As summer transitions to autumn, the September wind in Oia, Portugal becomes a gentle whisper, with an average speed of 2.7 m/s (6 mph). This slight decrease in wind intensity from the peak summer months reflects a general cooling down, giving way to the softer breezes typical of this time of year. The wind patterns show a steady ebb from the 3.4 m/s (8 mph) recorded in July to September's tranquil gusts, heralding the arrival of a more serene season. Visitors can enjoy the stunning views of the caldera without the summer's heaviest winds, making this an ideal time to experience Oia's breathtaking sunsets and charming landscapes. As days shorten and temperatures mellow, the calming September winds invite both relaxation and exploration in this enchanting coastal haven.
The weather in Oia changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Oia and find detailed weather information for every month.
In September, the weather tends to be quite warm, with temperatures ranging from a cool 10°C (50°F) at night to a scorching 36°C (97°F) during the day, averaging around 20°C (69°F). The humidity sits at a moderate 71%, and the month typically experiences about 37 mm (1.4 in) of precipitation over just four days. In contrast, January brings much cooler conditions, with temperatures dropping to a minimum of -2°C (29°F) and peaking at 21°C (69°F), resulting in an average of 9°C (49°F). This month is considerably wetter, with 70 mm (2.7 in) of rainfall spread over seven days, and humidity levels rising to 87%. For more detailed information about the weather during this time, you can visit Oia weather in January.
In September, the weather tends to be considerably warmer, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 36°C (97°F) and an average of 20°C (69°F). The month sees relatively low precipitation, with only 37 mm (1.4 in) over about four days, and humidity levels averaging around 71%. In contrast, February experiences much cooler temperatures, with minimums dropping to -1°C (31°F) and maximums reaching 23°C (73°F), resulting in an average temperature of 11°C (53°F). The precipitation is significantly higher in February, totaling 101 mm (4.0 in) over nine days, accompanied by higher humidity at 81%. For a closer look at February weather, please refer to Oia weather in February.
September and March display notable differences in weather patterns. In September, the temperatures range from a minimum of 10°C (50°F) to a maximum of 36°C (97°F), with an average temperature of 20°C (69°F). The month sees relatively low precipitation levels at 37 mm (1.4 in) over just 4 days, accompanied by a humidity level of 71%. In contrast, March features much cooler weather, with temperatures ranging from a chilly 2°C (36°F) to a warmer 27°C (81°F) and an average of 12°C (55°F). It experiences significantly higher rainfall, totaling 121 mm (4.8 in) over 11 days, and a slightly higher humidity of 78%. For more detailed insights, you can check Oia weather in March.
In comparing the weather of September and April, we notice distinct differences in temperature and precipitation. September typically enjoys warmer temperatures, with an average of 20°C (69°F) and daytime highs reaching up to 36°C (97°F). In contrast, April features a cooler average of 14°C (58°F) and maximum temperatures peaking at 29°C (84°F). Additionally, April experiences significantly higher rainfall, with 121 mm (4.8 in) over 13 days, compared to September's 37 mm (1.4 in) spread over just 4 days. The humidity is also slightly higher in April at 79%, compared to 71% in September. For more details on the weather during this month, you can check out Oia weather in April.
When comparing the weather in September and May, September tends to be warmer with average temperatures reaching 20°C (69°F), peaking at a maximum of 36°C (97°F), while May is milder with an average of 17°C (64°F) and a maximum of 33°C (92°F). September also sees less precipitation overall, with only 37 mm (1.4 in) over 4 days compared to May's 60 mm (2.4 in) on 8 days, indicating a drier climate. Additionally, humidity tends to be slightly lower in September at 71%, while May experiences a higher average humidity of 78%. For more detailed insights on weather conditions in May, you can explore Oia weather in May.
In comparing the weather between September and June, we see that both months have similar humidity levels, hovering around 71%. September experiences slightly warmer temperatures, with an average of 20°C (69°F) compared to June's 19°C (66°F). The maximum temperatures in both months are closely matched, reaching up to 36°C (97°F) in September and 35°C (96°F) in June. However, September tends to be less rainy, with only 37 mm (1.4 in) of precipitation over 4 days, while June sees a bit more rain at 35 mm (1.4 in) spread over 8 days. For more detailed insights on weather during this time, you can check Oia weather in June.
When comparing the weather in September to that of July, September exhibits slightly cooler temperatures, with a minimum of 10°C (50°F) and an average of 20°C (69°F), compared to July's minimum of 11°C (53°F) and average of 21°C (70°F). Both months experience relatively high maximum temperatures, though July edges out with a maximum of 38°C (100°F) against September’s 36°C (97°F). Additionally, September has a higher precipitation level at 37 mm (1.4 in) over four days, while July is drier, recording only 11 mm (0.4 in) over two days. Humidity is also slightly higher in September at 71%, in contrast to July's 63%. For more detailed insights, you can check Oia weather in July.
In comparing the weather between September and August, September brings slightly cooler temperatures, with a minimum of 10°C (50°F) and an average of 20°C (69°F), while August has a minimum of 11°C (53°F) and an average of 21°C (70°F). Notably, maximum temperatures in August reach up to 39°C (102°F), compared to September's maximum of 36°C (97°F). Moreover, precipitation in September is higher, with 37 mm (1.4 in) over 4 days, while August only sees 12 mm (0.5 in) across 2 days. Humidity levels are also higher in September at 71%, compared to 64% in August, making September feel a bit more muggy. For more detailed insights, you can check Oia weather in August.
September and October exhibit notable differences in weather patterns. In September, the temperatures range from a minimum of 10°C (50°F) to a maximum of 36°C (97°F), with an average of 20°C (69°F) and relatively low rainfall, totaling 37 mm (1.4 in) over just 4 days. Humidity during this month hovers around 71%. In contrast, October brings cooler temperatures, with a minimum of 5°C (42°F) and an average of 17°C (63°F), while the maximum only slightly decreases to 35°C (95°F). Precipitation significantly increases to 94 mm (3.7 in), occurring over 8 days, and humidity rises to 79%. For a closer look at weather conditions specific to this time, check out Oia weather in October.
September typically boasts warmer temperatures, with daily averages around 20°C (69°F) and highs reaching up to 36°C (97°F). In contrast, November experiences much cooler conditions, with an average temperature of 13°C (55°F) and a maximum of 25°C (76°F). While September sees relatively low precipitation of 37 mm over about 4 days, November brings a significant increase in rainfall, totaling 133 mm across 13 days, contributing to a higher humidity level of 86%. For a more detailed look at the weather trends, visit Oia weather in November.
In September, the weather is generally warm with average temperatures around 20°C (69°F) and a maximum that can reach up to 36°C (97°F). With only 37 mm (1.4 in) of precipitation over just four days, the humidity sits at a moderate 71%. In contrast, December brings a significant drop in temperatures, with averages around 11°C (52°F) and lows dipping to -1°C (30°F). The month is much wetter, with 135 mm (5.3 in) of rainfall occurring over 14 days, resulting in higher humidity levels of 87%. For those interested in a detailed look at the climate conditions during this time, you can visit Oia weather in December.
As September unfolds in Oia, the weather offers a delightful blend of mild temperatures and refreshing breezes, setting it apart from the hotter summer months. With average daily highs easing into more comfortable ranges, outdoor activities become increasingly enjoyable amidst the beautiful coastal scenery. Although occasional rain showers may appear, typically totaling just a few days, the overall humidity creates a serene atmosphere ideal for exploring. This transitional month provides a perfect retreat for those looking to savor the tail end of summer while avoiding the peak crowds. For more insights about the seasonal changes, check out Oia Climate.