Last updated: February 24, 2025
September in Sesimbra, Portugal is characterized by a delightful blend of warmth and moderate humidity, making it an ideal time to explore this coastal gem. With maximum temperatures reaching up to 30°C (86°F) and an average of 21°C (69°F), visitors can enjoy sunny days perfect for beach outings. The month typically sees a minimum temperature dipping to 14°C (57°F), providing a comfortable evening atmosphere. Rainfall is minimal, with only about 18 mm (0.7 in) spread across just two days, allowing for plenty of dry, enjoyable weather. With an average humidity level of 67%, the climate remains pleasant, making September a wonderful time to experience the charm of Sesimbra.
In September, Sesimbra experiences a delightful transition from summer's peak to the early hints of autumn. With minimum temperatures averaging around 14°C (57°F) and rising to a comfortable average of 21°C (69°F), this coastal town remains warm and inviting. The maximum temperature can reach up to 30°C (86°F), providing plenty of sunshine for beachgoers and outdoor enthusiasts alike. As the month progresses, a gradual dip in temperatures marks a shift from the sweltering August heat, making September an ideal time for those seeking pleasant weather and a vibrant atmosphere. The lingering warmth, combined with the stunning natural beauty of Sesimbra, creates a perfect backdrop for exploration and relaxation as summer gives way to fall.
In September, Sesimbra begins to transition from the dry summer months, experiencing an increase in precipitation with 18 mm (0.7 in) of rain over just 2 days. This marks a distinct shift from the almost complete drought of August, which recorded no rainfall, as the region prepares for the wetter autumn season ahead. Compared to the preceding months, which saw remarkably low totals—particularly June and July with only 8 mm (0.3 in) and 4 mm (0.2 in) respectively—September introduces a welcome, albeit modest, burst of moisture. Looking ahead, October is forecasted to bring even more rain with 39 mm (1.5 in), suggesting that while summer's arid grip loosens, the vibrant fall season promises a refreshing renewal for the landscape.
In Sesimbra, Portugal, September ushers in a slight increase in humidity, reaching 67%, after the summer months, which typically hover around 60%. This subtle rise marks a transition from the dry heat of July and August, reflecting the onset of autumn. Interestingly, although September's humidity is higher than the preceding months, it remains significantly lower than the levels seen in the early and late winter months, where humidity peaks at 85% in January and December. This trend illustrates how the coastal climate of Sesimbra balances between drier summer spells and the more humid, cooler conditions that follow, providing a unique atmospheric rhythm through the year.
In September, Sesimbra experiences a UV Index of 8, categorizing it as very high. This trend continues the pattern established throughout the summer months, where high UV levels dominate. Though slightly lower than August's peak of 9, the burn time remains short at just 15 minutes, urging residents and visitors alike to take appropriate precautions. As the season transitions, the UV index will gradually decline in the following months, but September stands as a poignant reminder of summer's lasting strength in this beautiful coastal town. For detailed insights, visit Sesimbra UV Index.
UV Risk Categories
September in Sesimbra, Portugal, offers a stunning transition from the sun-drenched peak of summer to the more temperate embrace of autumn. With an impressive 350 hours of sunshine, the month stands out as a vibrant conclusion to the summer season, showcasing slightly decreased sunlight compared to the sunniest months of July and August. This gradual decline in sunshine hours, from 422 in July to 396 in August, hints at the approaching fall, yet September still delivers abundant warmth and light perfect for beach days and exploring the charming coastal town. As daylight continues to fade in the ensuing months, with October and November witnessing further reductions, September allows visitors to soak in the last golden rays of summer bliss before the cooler months set in.
As summer bids farewell, September in Sesimbra, Portugal offers a delightful blend of lingering warmth and sunny days. With a 65% chance of sun, this month stands out as an inviting time to bask in the golden rays, even as the peak summer months begin to fade. Notably, September enjoys a significant uptick in sunshine compared to earlier spring months, reflecting the gradual transition into autumn. The idyllic weather not only mirrors the warmth of the preceding months—July and August boasting impressive 78% sunny days—but also provides a perfect opportunity for outdoor enthusiasts to explore the stunning coastal beauty before cooler days arrive. Embrace September’s sunny potential, where the essence of summer still lingers in the inviting Mediterranean air.
In September, Sesimbra, Portugal enjoys a generous 12 hours of daylight, marking a gentle decline from the summer peak of 14 hours seen in June, July, and August. This transition reflects the slow and steady departure from the sun-soaked days of summer as autumn approaches. As the month unfolds, the daylight hours gradually shrink, foreshadowing the shorter days ahead in October with 11 hours, allowing residents and visitors alike to savor the lingering warmth and vibrant sunsets. The comfortable rainfall and milder temperatures enhance the charming atmosphere of Sesimbra, making September an ideal time to explore this picturesque coastal town.
As summer wanes and September unfolds in Sesimbra, Portugal, the winds begin to soften, with an average speed of 4.2 m/s (9 mph)—the gentlest gust of the year. This change signals a transition from the bustling, breezier days of July and August, where wind speeds peaked at 5.4 m/s (12 mph) and 4.9 m/s (11 mph), respectively. While the winds may be quieter now, September's charm lies in its mild conditions, making it an ideal time for leisurely beach strolls and sunset views. As the year progresses, the average wind speeds tend to taper down, creating a serene atmosphere that invites visitors to embrace the beauty of Sesimbra as summer gives way to autumn.
The weather in Sesimbra 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 Sesimbra and find detailed weather information for every month.
September typically showcases warmer weather, with average temperatures around 21°C (69°F) and highs reaching up to 30°C (86°F). The month sees relatively low precipitation, totaling only 18 mm (0.7 in) over just 2 days, along with moderate humidity at 67%. In contrast, January experiences much cooler temperatures, with an average of 12°C (54°F) and maximums of 20°C (68°F). The month is wetter, accumulating 34 mm (1.3 in) of rain over 4 days, accompanied by higher humidity levels at 85%. For more detailed insights into January's climate, you can check Sesimbra weather in January.
September and February present notably different weather patterns. September enjoys relatively warmer temperatures, with a minimum of 14°C (57°F) and an average of 21°C (69°F), peaking at 30°C (86°F). The month sees light precipitation, totaling 18 mm (0.7 in) over just 2 days, and the humidity hovers around 67%. In contrast, February brings cooler conditions, with a minimum of 5°C (42°F) and an average temperature of 13°C (56°F), reaching a maximum of 21°C (71°F). This month is also wetter, recording 53 mm (2.1 in) of precipitation over 6 days, accompanied by slightly higher humidity at 75%. For more detailed insights, check out Sesimbra weather in February.
September tends to be warmer than March, with average temperatures reaching 21°C (69°F) and maximums of up to 30°C (86°F), compared to March’s average of 14°C (58°F) and max of 24°C (75°F). Additionally, September experiences significantly less precipitation, totaling only 18 mm (0.7 in) over about 2 days, while March sees a much wetter climate with 66 mm (2.6 in) spread across approximately 8 days. Humidity levels are somewhat comparable, with September at 67% and March slightly higher at 72%. For more detailed insights into March weather, you can check Sesimbra weather in March.
In comparing the weather of September and April, September tends to be warmer with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 30°C (86°F), while April has cooler temperatures, with averages between 9°C (48°F) and 24°C (76°F). September experiences significantly less rainfall, with only 18 mm (0.7 in) over 2 days, compared to April's 63 mm (2.5 in) of precipitation over 11 days. Interestingly, humidity levels are relatively similar, with September seeing 67% and April at 70%. For those looking for more detailed forecasts, you can check Sesimbra weather in April.
In comparing the weather of September and May, September tends to be warmer overall, with average temperatures around 21°C (69°F) and maximums reaching up to 30°C (86°F). In contrast, May has a lower average temperature of 18°C (64°F) and similarly peaks at 31°C (87°F), showing that while it can get hot, it generally starts off cooler. Additionally, September is drier with only 18 mm (0.7 in) of precipitation over just 2 days, compared to May's 31 mm (1.2 in) of rain over 4 days. Humidity levels are slightly higher in May at 70%, compared to 67% in September. For more detailed insights on May weather, check the full report Sesimbra weather in May.
When comparing the weather in September and June, we can see a few notable differences. September tends to be slightly warmer, with average temperatures around 21°C (69°F) compared to June's 19°C (67°F). Both months experience similar maximum temperatures, with September reaching 30°C (86°F) and June peaking at 31°C (89°F). Precipitation is relatively low in both months, but September has a slightly higher level of rainfall at 18 mm (0.7 in) compared to June's 8 mm (0.3 in), although both typically see precipitation on two days. Additionally, September has slightly higher humidity at 67% versus June's 63%. For more detailed information, you can check Sesimbra weather in June.
In comparing the weather between September and July, September experiences slightly cooler temperatures, with a minimum of 14°C (57°F) and a maximum of 30°C (86°F), while July's temperatures range from a minimum of 15°C (59°F) to a maximum of 31°C (88°F). Both months have an average temperature of around 21°C (69°F) to 21°C (70°F), but September sees more precipitation, with 18 mm (0.7 in) over 2 days compared to July's 4 mm (0.2 in) over just 1 day. Additionally, September's humidity levels are higher at 67%, compared to 60% in July. For more detailed information about July weather, you can visit this link: Sesimbra weather in July.
In comparing the weather between September and August, September features slightly cooler temperatures, with minimums dropping to 14°C (57°F) and maximums reaching 30°C (86°F), while August's temperatures have minimums of 16°C (61°F) and highs peaking at 34°C (94°F). Interestingly, September experiences a modest amount of precipitation, with 18 mm (0.7 in) over just 2 days, contrasting sharply with August, which boasts an impressively dry streak with only 3 mm (0.1 in) and no rainy days. Additionally, humidity is higher in September at 67%, compared to 60% in August. For those interested, more details can be found in Sesimbra weather in August.
September typically brings warmer temperatures, with averages around 21°C (69°F) and a maximum reaching up to 30°C (86°F). In contrast, October sees a slight drop in temperature, averaging 19°C (66°F) and peaking at 28°C (83°F). While September experiences minimal precipitation at just 18 mm over two days, October is rainier, accumulating 39 mm over four days. Additionally, humidity increases from 67% in September to 74% in October, contributing to a more humid feel as the month progresses. For more details, check Sesimbra weather in October.
September's weather is characterized by warmer temperatures, with a minimum of 14°C (57°F) and an average of 21°C (69°F), peaking at a comfortable 30°C (86°F). This month experiences relatively low precipitation at just 18 mm (0.7 in) over 2 days and a moderate humidity level of 67%. In contrast, November brings cooler conditions, with temperatures dropping to a minimum of 8°C (47°F) and an average of 15°C (60°F), reaching a maximum of 23°C (73°F). The month sees a significant increase in precipitation, accumulating 69 mm (2.7 in) across 9 days, and higher humidity at 83%. For more details on November weather in this region, visit Sesimbra weather in November.
In comparing the weather of September and December, there is a noticeable shift in temperatures and precipitation patterns. September offers a milder climate with minimum temperatures around 14°C (57°F) and maximums reaching up to 30°C (86°F), accompanied by relatively low rainfall of only 18 mm over 2 days. In contrast, December brings cooler conditions, with minimum temperatures dropping to 6°C (43°F) and a maximum of 18°C (66°F), as well as increased rainfall, totaling 54 mm over 7 days. Additionally, humidity levels are higher in December at 85%, compared to 67% in September. For more detailed information, you can check out Sesimbra weather in December.
September in Sesimbra offers a delightful transition from the summer heat, boasting pleasantly warm temperatures that average around 21°C (69°F). Unlike the peak summer months, when the sun blazes down relentlessly, September brings a welcomed respite with mild evenings cooling down to around 14°C (57°F). Rainfall is minimal, making it one of the drier periods of the year, with just a couple of days of precipitation. The humidity remains comfortable at 67%, ensuring a pleasant atmosphere for outdoor activities. This month presents the perfect blend of summer warmth and autumn freshness, ideal for those looking to enjoy the beauty of Sesimbra. For a deeper dive into the overall climate of this charming coastal town, visit Sesimbra Climate.