Last updated: February 24, 2025
In Monte Estoril, Portugal, September offers a delightful blend of mild temperatures and refreshing coastal breezes. With a maximum temperature reaching 23°C (74°F) and an average of 18°C (65°F), the weather is perfect for exploring the stunning shoreline or relaxing in the sun. Cool evenings bring a comfortable minimum of 15°C (60°F), providing a cozy atmosphere for outdoor dining. While the humidity hovers around 67%, the month is relatively dry, with just 32 mm (1.2 in) of rain over two days, making September an ideal time to visit this picturesque seaside town.
In September, Monte Estoril, Portugal, enjoys a delightful transition into autumn, with temperatures gently cooling yet remaining pleasantly warm. The average temperature hovers around 18°C (65°F), with typical daily highs reaching up to 23°C (74°F)—perfect for soaking up the last rays of summer sun. As the month progresses, min temperatures start at a comfortable 15°C (60°F), making it an ideal time for outdoor activities or leisurely strolls along the stunning coastline. This trend of mild and inviting weather encourages visitors to experience the charm of this coastal town before the cooler days of October set in. Overall, September offers a beautiful blend of warmth and comfort, making it a perfect month for exploration and relaxation in Monte Estoril.
In September, Monte Estoril experiences a noticeable shift in precipitation patterns as summer transitions to autumn. The city receives 32 mm (1.2 in) of rain over 2 days, marking a modest increase compared to the dry summer months of July and August. This uptick in rainfall prepares the region for the wetter months ahead, as October typically brings a more significant 53 mm (2.1 in). Interestingly, September's precipitation is higher than the previous months, hinting at the beginning of a seasonal change. The overall decrease in dry days, paired with a gradual rise in precipitation, underscores the climatic shift that characterizes this time of year, setting the stage for the lush greenery that follows in the coming months.
As the summer transitions to autumn in Monte Estoril, Portugal, September experiences a slight rise in humidity, averaging 67%. This marks a subtle increase from the drier months of July and August, which both hover around 60%. While still lower than the spring months, September's humidity begins to bridge the gap towards the wetter conditions typical of later in the year, with October and November both seeing humidity levels soar to 74% and 83%, respectively. This gradual uptick signals the approach of the rainy season, creating a refreshing contrast from the sun-soaked summer, making September an ideal time for visitors to enjoy the lingering warmth before the chill sets in.
In September, the UV Index in Monte Estoril, Portugal stands at a notable 8, placing it within the very high exposure category, with a burn time of just 15 minutes. This marks a gradual decline from the peak UV levels experienced during the summer months, where June reached an extreme level of 11. However, September's index still calls for caution, as sun exposure can lead to skin damage in less than a quarter of an hour. As autumn approaches, it’s crucial to remain vigilant about sun protection, especially since the UV Index will continue to decline into October, signaling a shift towards more moderate levels. For detailed information on UV levels throughout the year, check out Monte Estoril UV Index.
UV Risk Categories
September in Monte Estoril, Portugal, offers a delightful transition from the summer's heat into the comfortable embrace of autumn, with a generous 348 hours of sunshine. While this marks a notable decrease from the sun-drenched peak of 420 hours in July, it still outshines the early fall months, creating a warm invitation for visitors. As the days grow shorter, the sun continues to glow warmly, lingering longer than the decreasing hours in October and November. This trend reflects not only the fading summer but also the region's charm that can be experienced well into September, making it an ideal time for those seeking both sun and mild weather before winter’s approach.
In Monte Estoril, Portugal, September boasts a promising 66% chance of sunny weather, maintaining the high standards set by the peak summer months of July and August. As summer fades, this enchanting coastal town continues to relish in a warm and inviting atmosphere, making it an ideal time for outdoor activities and beach outings. Following a steady increase in sunshine from January’s 45% to the robust summer figures, September stands out as a delightful bridge between the lively summer and the mellower autumn. With such a favorable forecast, visitors can expect to enjoy the last whispers of summer sunshine amid the region's stunning landscapes.
As summer draws to a close in September, Monte Estoril basks in 12 hours of daylight, a delightful transition from the peak summer months. This month marks a gentle decline in sunlight hours, down from the 14 hours enjoyed during the height of summer in July and August. While September's daylight dwindles, it still offers a generous amount of sunshine compared to the winter months ahead, providing ample opportunity to soak in the vibrant coastal scenery. The shift to autumn is palpable as the days gradually shorten, setting the stage for the cozy charms of the upcoming season.
As summer transitions into autumn, September in Monte Estoril brings a gentle shift in the breeze, with average wind speeds dropping to 5.4 m/s (12 mph). This notable decline from the more robust gusts of the preceding months indicates a calming of the coastal winds as the region prepares for cooler temperatures. Throughout the year, wind speeds are generally robust, with peaks in late spring and summer at around 7.3 m/s (16 mph). However, September's breath signifies a time for reflection and a slower pace, as the pleasant warmth lingers while nature begins its subtle transformation. With the winds softening, visitors can enjoy serene walks along the coastline, soaking up the tranquil vibe of early autumn in this beautiful part of Portugal.
The weather in Monte Estoril 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 Monte Estoril and find detailed weather information for every month.
September and January present contrasting weather conditions. In September, temperatures range from a minimum of 15°C (60°F) to a pleasant maximum of 23°C (74°F), accompanied by relatively low precipitation of 32 mm (1.2 in) over just 2 days, and a moderate humidity level of 67%. In stark contrast, January experiences much cooler temperatures, with a minimum of 7°C (45°F) and a maximum of 18°C (64°F). Additionally, precipitation increases to 42 mm (1.7 in) spread over 7 days, leading to a higher humidity of 85%. For those interested in the specifics of January weather, please check Monte Estoril weather in January.
September and February present distinct contrasts in weather conditions. September enjoys milder temperatures, with averages around 18°C (65°F) and maximums reaching up to 23°C (74°F), complemented by relatively low precipitation of just 32 mm over two days. In contrast, February has cooler temperatures, averaging 13°C (56°F), and maximums of only 17°C (63°F). It also sees increased rainfall, with 59 mm over eight days, and higher humidity at 75%. For a more detailed look at February weather in this region, check out Monte Estoril weather in February.
September generally offers warmer temperatures compared to March, with average highs reaching 23°C (74°F) versus March's 19°C (66°F). The minimum temperatures in September start at a comfortable 15°C (60°F), while March begins at a cooler 9°C (49°F). In terms of precipitation, March is noticeably wetter, receiving 64 mm (2.5 inches) over 8 days, whereas September sees just 32 mm (1.2 inches) across 2 days. Both months feature relatively high humidity levels, with September at 67% and March slightly higher at 72%. For a more detailed look at the weather in March, visit Monte Estoril weather in March.
When comparing the weather in September and April, we can see distinct differences. September boasts warmer temperatures, with an average of 18°C (65°F) and a maximum of 23°C (74°F), while April is cooler, averaging just 14°C (58°F) and peaking at 21°C (71°F). The precipitation in September is relatively low at 32 mm (1.2 in) over just two days, compared to April's significantly higher total of 71 mm (2.8 in) spread over 11 days. Additionally, both months experience similar humidity levels, with September at 67% and April slightly higher at 70%. For more specific details on April's weather, check out Monte Estoril weather in April.
In comparing the weather of September and May, September tends to be slightly warmer, with average temperatures around 18°C (65°F) compared to May's 16°C (61°F). While September experiences a maximum temperature of 23°C (74°F), May can reach up to 24°C (76°F), showcasing a similar high range. Precipitation is fairly consistent, with September recording 32 mm (1.2 in) over 2 days and May having a slightly higher precipitation of 33 mm (1.3 in) over 3 days. Humidity levels are comparable as well, with September at 67% and May at 70%. For a detailed look at May weather, you can visit Monte Estoril weather in May.
When comparing the weather between September and June, both months exhibit mild temperatures, but September tends to be a bit warmer. In June, the temperatures range from a minimum of 14°C (58°F) to a maximum of 22°C (72°F), with an average of 17°C (63°F). In contrast, September offers slightly higher temperatures, with a minimum of 15°C (60°F), an average of 18°C (65°F), and a maximum of 23°C (74°F). Precipitation is noticeably lower in June, totaling just 12 mm (0.5 in) over 2 days, compared to September's 32 mm (1.2 in) also over 2 days. Humidity levels are similar, with June at 63% and September at 67%, contributing to a comfortable climate ideal for outdoor activities. For those wanting more details on June weather, check out Monte Estoril weather in June.
In comparing the weather between September and July, we see that September tends to be slightly cooler, with average temperatures ranging from a minimum of 15°C to a maximum of 23°C, while July's temperatures hover slightly higher, with a minimum of 16°C and a maximum of 21°C. Precipitation is more prevalent in September, with 32 mm falling over two days, whereas July boasts a much drier profile with only 3 mm of rain and no rainy days. Additionally, September exhibits higher humidity levels at 67%, compared to July's 60%, adding to the overall comfort of July's warmer, sunnier days. For more specific insights into the weather conditions during this time, you can refer to Monte Estoril weather in July.
In comparing the weather between August and September, both months exhibit similar temperature ranges, with minimums of 15-16°C (60-61°F), average temperatures of around 18°C (65°F), and maximums peaking at 23°C (74°F). However, September typically sees a slight increase in humidity at 67% compared to August's 60%. Notably, precipitation is more pronounced in September, with 32 mm (1.2 in) recorded over 2 days, while August only experiences 4 mm (0.1 in) on a single day. For more detailed insights into August weather, you can visit Monte Estoril weather in August.
September and October exhibit a transition in weather patterns. While September maintains a warm average temperature of 18°C (65°F) with a comfortable max of 23°C (74°F), October sees cooler mornings with a minimum temperature of 11°C (52°F). Both months share the same maximum temperature, but October experiences increased precipitation, totaling 53 mm (2.1 in) over 6 days compared to September’s 32 mm (1.2 in) over just 2 days. Additionally, October's humidity rises slightly to 74% compared to September's 67%. For more detailed insights, you can visit Monte Estoril weather in October.
In September, the weather is generally milder, with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 23°C (74°F), and an average temperature of 18°C (65°F). The month sees relatively low precipitation, with only 32 mm (1.2 in) falling over just 2 days, and humidity levels at around 67%.
In contrast, November brings cooler temperatures, with a minimum of 11°C (53°F) and a maximum of 20°C (68°F), averaging at 16°C (60°F). This month experiences significantly higher precipitation, totaling 89 mm (3.5 in) over 11 days, contributing to a much more humid environment with humidity levels rising to 83%. For more details on the weather conditions typical for this month, visit Monte Estoril weather in November.
When comparing the weather between September and December, it’s clear that December is cooler and wetter. September tends to have milder temperatures, with average highs of 23°C (74°F) and lows around 15°C (60°F), while December sees a drop in temperatures, averaging 14°C (58°F) with maximums reaching only 17°C (63°F) and minimums falling to 9°C (49°F). Additionally, December experiences significantly more rainfall, with 73 mm (2.9 in) expected over 10 days, compared to just 32 mm (1.2 in) over 2 days in September. The humidity also increases in December, rising to 85%, compared to September’s 67%. For more details on December conditions, you can check Monte Estoril weather in December.
As summer makes its graceful exit, September in Monte Estoril ushers in a milder climate characterized by delightful temperatures and refreshing breezes. With average temperatures lingering around a comfortable 18°C (65°F), this month marks a notable shift from the heat of July and August, offering visitors a perfect balance of warmth without the sweltering highs. The occasional rain, contributing to just 32 mm of precipitation over a couple of days, keeps the landscape lush while maintaining pleasant humidity levels of 67%. September’s blend of sunny days and cooler evenings makes it an ideal time for outdoor activities and exploring the stunning coastal scenery. For a more detailed overview of the climate throughout the year, visit Monte Estoril Climate.