Last updated: February 24, 2025
In September, the charming town of Horta, Portugal, experiences a delightful climate that balances warmth and occasional refreshing rain. With maximum temperatures reaching 25°C (77°F) and an average around 22°C (72°F), it's an ideal time for outdoor exploration. The minimum temperature hovers at a comfortable 19°C (66°F), ensuring cozy evenings. Travelers should prepare for some rainfall, as 11 days of precipitation yield a total of 57 mm (2.2 in), contributing to the lush landscape. Coupled with a humidity level of 83%, September in Horta is a vivid blend of mild warmth and the refreshing essence of the Atlantic, perfect for both adventure seekers and those looking to relax.
As September arrives in Horta, Portugal, it marks the transition into a pleasantly warm phase of the year. With minimum temperatures averaging 19°C (66°F), the days are still balmy, resembling the residual heat of summer. The average temperature climbs to a comfortable 22°C (72°F), while maximums reach up to 25°C (77°F), providing ideal conditions for outdoor activities. This month signifies a gradual easing from the peak summer warmth of August, though the warmth persists, creating a delightful atmosphere for exploring the island’s natural beauty. The temperature trends reveal a steady climb from earlier months, setting September apart as a unique blend of summer's end and autumn's gentle embrace.
September in Horta, Portugal, marks a transition in the weather, with precipitation reaching 57 mm (2.2 in) over an average of 11 days. While the rainfall is relatively modest compared to the wetter months of November and December, it still sets the stage for the region’s autumnal shift. The slight decrease in precipitation from August’s 58 mm reflects a subtle change, hinting at the approaching wetter months ahead. As summer fades, the increased moisture contributes to the lush landscapes that characterize this picturesque island, illustrating a seasonal rhythm where each drop serves to nourish the vibrant flora.
In September, Horta, Portugal, experiences a refreshing shift in humidity, settling at a comfortable 83%. This marks a slight dip compared to the sweltering heights of July, which boasts a peak of 86%, but it remains consistent with the humidity levels seen in May and August. As summer transitions to autumn, the humidity gradually decreases, paving the way for the crisp, more invigorating conditions of October, where it drops further to 79%. Overall, September balances the warm summer remnants with a gentle easing, offering a pleasant ambience that invites exploration of Horta’s scenic beauty.
As summer transitions into autumn, September in Horta, Portugal experiences a slight dip in the UV Index, boasting a value of 9, which falls under the very high exposure category. This month sees a continuation of the intense sunlight felt throughout the summer, with a recommended burn time of just 15 minutes. The trend of elevated UV levels remains prominent, as the region moves from the extreme highs of June and July to gradually lower indices in October and beyond. It’s a reminder to stay vigilant with sun protection while enjoying the warm, lingering rays of early fall. For more insights, check out the complete Horta UV Index.
UV Risk Categories
September in Horta, Portugal, boasts 319 hours of sunshine, marking it as a delightful transition from the sun-soaked summer months to the cooler autumn days. As the peak summer hours of July (388) and August (362) wane, September still retains a generous amount of sunlight, ensuring outdoor enthusiasts can relish in warm, bright days. Interestingly, the light begins to taper off significantly by October, dipping to 276 hours, reinforcing September's status as a radiant bridge between vibrant summer and the forthcoming seasonal shifts. With a steady growth in sunshine leading up to this month, it encapsulates the essence of late summer's charm, inviting visitors to soak in the lingering warmth before the days grow shorter.
In Horta, Portugal, September marks a delightful transition into early autumn with a 43% chance of sunny weather. Although this figure shows a slight decrease from the sun-drenched heights of August, where the likelihood peaks at 52%, it still signifies a favorable climate for outdoor activities. As summer gives way to autumn, the chance of sunshine in September remains considerably stronger compared to the earlier months of the year, particularly when contrasted with January's meager 21%. This trend illustrates the region's inviting atmosphere during late summer and early autumn, making Horta a charming destination for sun-seekers well into September.
As summer transitions to autumn in Horta, Portugal, September greets residents with approximately 12 hours of daylight, signaling a gradual shift from the long, sunlit days of July and August, which boast a peak of 14 hours. This month serves as a mild bridge; while daylight begins to wane, it retains a comfortable warmth that invites outdoor activities. Following the vibrant daylight of late spring, which reaches 14 hours in May and June, September offers a beautiful balance, combining the lingering brightness of summer with the refreshing crispness of approaching fall. As October approaches, the duration will taper off to 11 hours, but for now, September encapsulates the sweet farewell to summer, engaging the senses with lingering sunsets and gentle evenings.
In September, Horta, Portugal, experiences a gentle shift in its winds, with an average speed of 6.4 m/s (14 mph). This marks a slight increase from the calm of summer, where wind speeds lingered around 6.1 m/s in both July and August. As the summer breezes begin to mellow, it sets the stage for transitioning weather patterns leading into autumn. Historically, September's winds are characterized by a serene usability, enabling outdoor enthusiasts to enjoy a variety of activities against the stunning backdrop of the Azores. Looking ahead, wind speeds gradually pick up in October to 6.7 m/s (15 mph), hinting at the invigorating gales that the end of the year will bring.
The weather in Horta 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 Horta and find detailed weather information for every month.
In September, the weather is generally warmer with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 25°C (77°F), making it a pleasant time of year with moderate humidity at 83%. The month receives approximately 57 mm (2.2 in) of precipitation over about 11 days. In contrast, January features cooler temperatures, with averages between 12°C (53°F) and 19°C (66°F). This month also sees higher precipitation at 90 mm (3.6 in) over 12 days, coupled with slightly higher humidity at 84%. For more detailed information about January weather, you can visit Horta weather in January.
September and February present distinctly different weather patterns. In September, the temperatures are milder, with a minimum of 19°C (66°F) and an average of 22°C (72°F), peaking at 25°C (77°F). The precipitation level is moderate, with 57 mm (2.2 in) spread over approximately 11 days, while the humidity remains high at 83%. In contrast, February experiences cooler temperatures, with a minimum of 9°C (49°F) and an average of 15°C (59°F), reaching a maximum of only 18°C (64°F). The month is slightly wetter, with 79 mm (3.1 in) of rainfall over 14 days, yet the humidity remains at 83%, similar to September. For a more detailed look at February conditions, visit Horta weather in February.
September and March present contrasting weather patterns. In September, temperatures are generally warmer, with average highs reaching 25°C (77°F) compared to March's maximum of 18°C (65°F). Humidity is slightly lower in September at 83%, while March sees a slightly higher level at 85%. Rainfall is comparable, with September receiving 57 mm over 11 days, and March experiencing 63 mm over 10 days. For a more detailed look at March conditions, check out Horta weather in March.
September and April reflect contrasting weather patterns, with September enjoying warmer temperatures and a relatively mild climate. In September, temperatures range from a minimum of 19°C (66°F) to a maximum of 25°C (77°F), with an average of 22°C (72°F). In contrast, April sees cooler temperatures, with a minimum of 9°C (49°F) and a maximum of 18°C (65°F), averaging just 15°C (60°F). Additionally, while September experiences 57 mm (2.2 in) of precipitation over 11 days, April is slightly wetter, receiving 75 mm (3.0 in) over 14 days. Both months have high humidity, with September at 83% and April slightly higher at 85%. For more detailed insights on the weather in April, check out Horta weather in April.
In comparing the weather between September and May, September typically enjoys warmer temperatures, with a minimum of 19°C (66°F) and an average of 22°C (72°F), reaching a maximum of 25°C (77°F). In contrast, May experiences cooler temperatures, with a minimum of 12°C (53°F) and an average of 17°C (62°F), peaking at 20°C (67°F).
Both months see a similar number of rainy days at 11, but September receives slightly less precipitation at 57 mm (2.2 in) compared to May's 63 mm (2.5 in). Interestingly, despite the differences in temperature and precipitation levels, both months have a consistent humidity level of 83%. For those interested in more detailed information on May's weather, you can visit Horta weather in May.
When comparing the weather in September to June, September tends to be warmer and slightly more humid. In September, the average temperature reaches 22°C (72°F), with a minimum of 19°C (66°F) and a maximum of 25°C (77°F), while June sees lower temperatures, averaging 19°C (66°F), with a minimum of 14°C (57°F) and a maximum of 23°C (73°F). Additionally, September experiences more rainfall, with 57 mm (2.2 in) falling over 11 days, compared to June's 38 mm (1.5 in) over just 6 days. Both months have high humidity levels, but September's humidity sits at 83%, just slightly lower than June's 85%. For more detailed weather information, you can visit Horta weather in June.
When comparing the weather in September to that of July, we see that September tends to be slightly warmer, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 25°C (77°F), while July has slightly cooler averages, with temperatures ranging from 18°C (64°F) to 24°C (75°F). Additionally, September experiences more precipitation, totaling 57 mm (2.2 in) over 11 days, compared to July's 27 mm (1.1 in) over just 5 days. Humidity levels remain high in both months, but September is slightly less humid at 83% compared to July's 86%. For more detailed information, you can refer to Horta weather in July.
September and August display quite similar weather patterns, with both months experiencing an average temperature of around 22°C (72°F) and maximums reaching 25°C (77°F). However, September starts with a slightly cooler minimum temperature of 19°C (66°F), while August begins at 20°C (68°F). Precipitation levels in September are comparable to August, with 57 mm (2.2 in) of rain over 11 days, just a bit more than August's 58 mm (2.3 in) over 9 days. Both months maintain humidity levels at a consistent 83%, resulting in a similarly warm yet damp climate. For more detailed insights, you can check Horta weather in August.
In September, the weather tends to be warmer with average temperatures around 22°C (72°F) and maximum temperatures reaching up to 25°C (77°F). The month experiences about 57 mm (2.2 in) of precipitation over approximately 11 days, coupled with a relatively high humidity level of 83%. In contrast, October sees a slight drop in temperatures, with an average of 20°C (69°F) and a minimum of 15°C (59°F). Precipitation increases to 74 mm (2.9 in) over 12 days, and the humidity remains somewhat lower at 79%. Despite the reduction in temperature, October still shares similar high temperatures to September, maintaining a pleasantly mild climate. For more detailed insights, check out Horta weather in October.
In September, the weather is generally warmer, with average temperatures hovering around 22°C (72°F) and maximums reaching up to 25°C (77°F), making it a pleasant month for outdoor activities. However, it also sees around 57 mm (2.2 inches) of precipitation spread over 11 days, combined with relatively high humidity at 83%. In contrast, November experiences cooler temperatures, averaging 18°C (65°F) with maximums of 22°C (71°F) and a minimum dip to 14°C (57°F). This month is notably wetter, with precipitation soaring to 124 mm (4.9 inches) over 15 days, while humidity remains slightly lower at 80%. For more detailed insights, check out Horta weather in November.
In comparison to September, December experiences a significant drop in temperatures, with average highs decreasing from 25°C (77°F) to 20°C (68°F) and lows falling from 19°C (66°F) to 12°C (54°F). Additionally, December tends to be wetter, receiving 108 mm (4.3 in) of precipitation over 14 days, compared to September’s 57 mm (2.2 in) over 11 days. Humidity levels remain relatively high in both months, with December slightly edging out at 85% compared to September's 83%. For more detailed information, you can check out Horta weather in December.
September in Horta offers a delightful transition from the warmth of summer to the subtle chill of autumn. With average temperatures comfortably resting around 22°C, it's a perfect time for outdoor exploration. However, it's also a month that experiences increased precipitation compared to the drier summer months, with about 11 days of rain adding to the lush greenery of the landscape. The humidity levels tend to linger around 83%, contributing to a refreshing yet damp atmosphere. For those interested in understanding Horta's unique climate patterns and how September stands out, visit Horta Climate.