September Weather in Silves, Portugal

Last updated: February 24, 2025

Experience the vibrant weather of Silves, Portugal in September, where temperatures can soar to a maximum of 37°C (98°F), while averaging a pleasant 22°C (73°F). With a minimum temperature of 11°C (52°F), the month offers a delightful variety for outdoor adventurers and sun-seekers alike. Rain is a rare occurrence, with only 8 mm (0.3 in) of precipitation over the entire month, typically falling on just one day. The humidity hovers around a comfortable 71%, creating an ideal environment for exploring this historic town. Enjoy the warm, sunny days and gentle evenings that make September an excellent time to visit Silves!

September Temperature in Silves

September in Silves, Portugal, marks a delightful transition into autumn, with temperatures that remain pleasantly warm. The month greets visitors with minimums around 11°C (52°F), providing a cool reprieve from the summer heat. Average temperatures rise to a comfortable 22°C (73°F), allowing for enjoyable outdoor activities without the sweltering heat of the preceding months. With maximums reaching up to 37°C (98°F), the days can still be quite hot, reminiscent of the summer's peak, but the evenings tend to cool down, creating a perfect balance. As September unfolds, the patterns from the summer linger, ensuring that while the heat begins to wane, there's still plenty of sunshine to savor before the cooler months take over.

September Weather in Silves: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Silves, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec505456596669737572665854
Data source: Temperature data for Silves generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Silves

In Silves, Portugal, the month of September experiences a notable shift in precipitation patterns, with 8 mm (0.3 in) of rain typically falling over just 1 day. This marks a slight increase from the arid summer months of July and August, which recorded minimal rainfall of 3 mm and 1 mm respectively, highlighting the region's transition into the wetter autumn season. As temperatures begin to cool, September serves as a gentle precursor to the more substantial rainfall that arrives in October and November, where totals rise significantly to 32 mm (1.2 in) and 49 mm (1.9 in). This trend underscores the shift in climate dynamics, facilitating a refreshing change in the landscape as Silves moves away from the heat of summer into the lushness of fall.

September Precipitation Trends in Silves

The chart displays monthly precipitation patterns in Silves, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec24447865238318325045
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Silves

As summer fades into autumn, September in Silves, Portugal brings a slight rise in humidity to 71%, a small increase from the previous months' drier conditions. After experiencing relatively stable humidity levels throughout the summer, this uptick signals the beginnings of fall's embrace. Looking back, the year starts with quite high humidity in January at 80%, gradually decreasing until a minimum of 67% in June. However, as the landscape transitions towards winter, the humidity steadily rises again, peaking at 81% in December. This pattern reveals a dynamic shift throughout the year, where the dry heat of summer gives way to the refreshing moisture of autumn and winter.

September Average Humidity in Silves

This chart illustrates the average monthly humidity levels in Silves, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec80%74%71%69%69%67%69%68%71%75%78%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Silves

In September, Silves, Portugal experiences a UV Index of 9, categorized as very high, indicating that sun protection is essential during this time, with a burn time of just 15 minutes. This marks a slight decrease from the scorching summer months of June through August, where the UV Index peaked at 11. Nonetheless, September remains a time for vigilance, as the sun's rays can still cause significant skin damage in a short period. As the season transitions towards autumn, it's key to stay informed about UV levels for your outdoor activities. For more detailed information on UV exposure trends throughout the year, check out Silves UV Index.

Maximum UV Index Levels in Silves for September

The chart shows the monthly maximum UV Index (UVI) for Silves in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109743
Data source: Silves September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Silves

September in Silves, Portugal, offers a delightful transition from the sun-drenched summer months into the gentle embrace of autumn. With 351 hours of sunshine, this month holds onto the warmth of summer while gradually welcoming cooler breezes. After July's peak at 425 hours, the sunlight begins to decline, yet still outshines the earlier months of the year, such as January's 202 hours and November's 249 hours. This trend of abundant sunshine signals that September is perfect for outdoor adventures, as visitors can bask in the golden glow of the still-warm days while enjoying the stunning landscapes and rich history of Silves. The lingering summer sun captivates the spirit, making September a truly enchanting month to explore this charming Portuguese town.

Monthly Sunshine Duration in Silves: September Highlighted

The September sunshine duration represents the total number of hours Silves experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec202h248h308h359h410h412h425h397h351h323h249h244h
Data source: Silves September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Silves During September

In September, Silves, Portugal, enjoys a 65% chance of sunny weather, making it a delightful time for outdoor activities and exploration. As summer fades, the likelihood of sunshine remains robust, reflecting a gradual decrease from the peak of 87% in July and 84% in August. This trend underscores September's role as a transition month, where warm days linger, yet the crowds of peak season begin to disperse. The sun's consistent presence at this time contrasts markedly with the chillier months of early winter, particularly January and February, which dip to 44% and 23% respectively. Overall, September offers a wonderful balance of pleasant weather and fewer tourists, perfect for enjoying the charm of Silves.

Percentage of Sunny Days in September in Silves

The chart illustrates the percentage of sunny days in Silves throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Silves experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec44%23%59%38%65%76%87%84%65%58%72%44%
Data source: Silves September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Silves in September

As summer fades into autumn, September in Silves, Portugal, offers a gentle decline in daylight duration, featuring approximately 12 hours of sunshine each day. This marks a transition from the peak of 14 hours experienced in the summer months of June, July, and August. As the year progresses, we observe a gradual reduction in daylight, beginning from a modest 9 hours in January and gradually increasing through the spring to reach a high in late summer. The arrival of September signals the start of shorter days, ushering in the cooler, more tranquil days of fall while still retaining a sense of warmth and brightness from the summer sun.

Average Daylight Hours in Silves for September

The chart illustrates the variation in daylight duration in Silves throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 55m10h 49m11h 58m13h 9m14h 9m14h 39m14h 23m13h 30m12h 22m11h 11m10h 9m9h 38m
Data source: Silves daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Silves

As summer fades into autumn, September in Silves, Portugal brings a gentle shift in the air, with average wind speeds dipping to 3.2 m/s (7 mph). This decrease reflects a broader trend of declining winds as the year progresses, after a peak in July at 4.3 m/s (10 mph). Compared to the breezy summer months, September's winds offer a more tranquil experience, inviting locals and visitors alike to enjoy the picturesque landscapes without the harsh gusts typical of the hotter days. As the winds mellow, the charm of Silves is further illuminated by the softening light of the early autumn sun, creating a serene atmosphere that beckons exploration and relaxation.

Average September Wind Speed in Silves

The chart displays monthly wind speed patterns in Silves, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.93.43.24.13.94.33.73.2 m/s3.23.34.1
Data source: Silves September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Silves Compares to Other Months

The weather in Silves 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 Silves and find detailed weather information for every month.

September and January present distinctly different weather patterns. In September, temperatures range from a mild 11°C (52°F) at night to a scorching 37°C (98°F) during the day, with only minimal precipitation of 8 mm (0.3 in) over just one day. The humidity sits comfortably at 71%, providing a warm, but not overly oppressive, atmosphere. Conversely, January experiences much cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 21°C (70°F). This month sees increased precipitation of 24 mm (0.9 in) over three days, along with a higher humidity level of 80%. For more detailed insights into January's weather, visit Silves weather in January.

September and February present strikingly different weather patterns. In September, temperatures range from a comfortable 11°C (52°F) at night to a toasty maximum of 37°C (98°F) during the day, with low precipitation averaging just 8 mm (0.3 in) over a single rainy day. This month boasts an average temperature of 22°C (73°F) and a relative humidity of 71%, offering a warm and dry climate.

In contrast, February experiences much cooler temperatures, with a minimum of 1°C (34°F), an average of 12°C (55°F), and a maximum of 24°C (76°F). This month is significantly wetter, receiving about 44 mm (1.7 in) of precipitation across five days, alongside a similar humidity level of 73%. For more details on February weather, you can check Silves weather in February.

September and March present distinct contrasts in weather patterns. September enjoys warmer temperatures, with a minimum of 11°C (52°F) and an average high of 22°C (73°F), peaking at a scorching 37°C (98°F). It’s relatively dry, with only 8 mm (0.3 in) of precipitation falling on just one day. In contrast, March is much cooler, featuring a minimum temperature of 3°C (38°F) and an average of 14°C (57°F), with highs reaching 27°C (81°F). March is significantly wetter, receiving 78 mm (3.1 in) of rain over about nine days. Despite both months having a humidity level of 71%, the overall experience varies greatly, making each month unique in its own right. For a closer look at the weather during this time, check Silves weather in March.

In September, the weather tends to be warmer, with temperatures ranging from a low of 11°C (52°F) to a high of 37°C (98°F) and an average temperature of 22°C (73°F). The month experiences minimal precipitation, with only 8 mm (0.3 inches) over approximately one day, along with humidity levels around 71%. In contrast, April brings cooler conditions, featuring temperatures that range from a minimum of 6°C (44°F) to a maximum of 29°C (84°F), and an average temperature of 15°C (60°F). This month sees significantly more rain, with around 65 mm (2.5 inches) spread across 11 days, while humidity remains relatively stable at 69%. For more specific details on the weather in April, you can check Silves weather in April.

When comparing the weather in September and May, September typically showcases warmer temperatures, with daily averages around 22°C (73°F) and highs reaching up to 37°C (98°F). In contrast, May experiences slightly cooler conditions, averaging 19°C (66°F) and peaking at 34°C (93°F). While September enjoys minimal precipitation with just 8 mm (0.3 in) over one day, May is wetter, recording 23 mm (0.9 in) over four days. Humidity levels remain relatively similar, with September at 71% and May at 69%. For a more detailed overview of May weather, you can check Silves weather in May.

In comparing the weather of September and June, both months experience similar temperature ranges, with September averaging 22°C (73°F) and June averaging slightly cooler at 21°C (69°F). However, June can reach higher maximum temperatures, peaking at 40°C (105°F) compared to September's maximum of 37°C (98°F). Precipitation levels are consistent in both months, with each receiving 8 mm (0.3 in), although June sees slightly more rainy days (3 days) compared to just 1 day in September. Humidity levels are also similar, with September at 71% and June slightly lower at 67%. For more detailed insights, you can check Silves weather in June.

When comparing the weather in September and July, we see only slight differences in temperature and humidity. September enjoys a minimum temperature of 11°C (52°F) and an average high of 37°C (98°F), while July has a slightly warmer minimum of 12°C (55°F) and reaches up to 39°C (103°F). Both months experience minimal precipitation, but September sees a bit more rain with 8 mm (0.3 inches) compared to July's 3 mm (0.1 inches). Humidity levels are relatively similar, with September at 71% and July slightly lower at 69%. For a deeper dive into July weather, you can visit Silves weather in July.

In comparing the weather of September and August, we see a notable shift in temperatures and precipitation. September brings slightly cooler conditions, with a minimum temperature of 11°C (52°F) and an average of 22°C (73°F), while August features a higher minimum of 14°C (57°F) and an average of 24°C (75°F). Additionally, August can experience extreme highs, with temperatures peaking at 43°C (110°F), compared to September's maximum of 37°C (98°F). Precipitation is minimal in both months, but September records a slight increase in rainfall, with 8 mm over one day while August remains dry with no recorded precipitation. Overall, September offers a more moderate climate with higher humidity at 71% compared to August's 68%. For more details about August's weather, check Silves weather in August.

In September, temperatures are generally warm, with a minimum of 11°C (52°F) and an average of 22°C (73°F), peaking at a high of 37°C (98°F). The month is relatively dry, receiving only 8 mm (0.3 in) of precipitation over just one day, and the humidity is around 71%. In contrast, October brings cooler conditions, with minimum temperatures dropping to 8°C (46°F) and an average of 19°C (67°F), while the maximum temperature reaches 34°C (93°F). This month sees a significant increase in rainfall, totaling 32 mm (1.2 in) over four days, and humidity rises slightly to 75%. For more details on the weather in Silves during this month, you can check Silves weather in October.

September experiences significantly warmer temperatures, with minimums around 11°C (52°F) and maximums reaching up to 37°C (98°F), leading to an average of 22°C (73°F). In contrast, November brings cooler weather, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 25°C (76°F), yielding a much lower average of 14°C (58°F). Additionally, November tends to be much wetter, receiving 49 mm (1.9 in) of precipitation over approximately 7 days, compared to just 8 mm (0.3 in) on a single day in September. The humidity also rises slightly in November to 78%, compared to 71% in September. For more details, check out the Silves weather in November.

In September, the weather is warm and variable, with temperatures ranging from a cool 11°C (52°F) at night to a scorching high of 37°C (98°F) during the day, and relatively low precipitation of just 8 mm (0.3 in) over one rain day. The humidity hovers around 71%, providing a comfortable atmosphere for outdoor activities. In contrast, December brings much cooler temperatures, with a minimum of 0°C (33°F) and an average of 12°C (54°F), peaking at 22°C (71°F). The month experiences considerably more rainfall, totaling 45 mm (1.8 in) over six days, and the humidity rises to 81%, giving it a distinctly more wintery feel. For more detailed weather information in December, visit Silves weather in December.

Compare Silves's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Silves

As summer transitions to autumn, September in Silves offers a delightful change in weather that contrasts with the hotter months preceding it. The temperatures remain comfortably warm, averaging around 22°C (73°F), yet rarely feel oppressively hot thanks to occasional breezes. With only a slight chance of rain—just one day of precipitation totaling 8 mm—the sunshine can still be enjoyed as the humidity settles at a pleasant 71%. This blend of warmth and mildness makes September an ideal time to explore the region, providing a perfect balance before the cooler months set in. For a deeper dive into what to expect, check out Silves Climate.