September Weather in Angra do Heroismo, Portugal

Last updated: February 24, 2025

In September, Angra do Heroísmo, Portugal, experiences a delightful average temperature of 22°C (71°F), with maximum highs reaching up to 24°C (76°F) and comfortable lows around 19°C (66°F). This month welcomes a moderate precipitation level of 45 mm (1.8 in), typically spread over 10 days, making it a pleasant time to engage in outdoor activities. Coupled with a humidity rate of 82%, the climate provides a refreshing environment to enjoy the stunning landscapes and rich heritage of this charming island town. Whether you're strolling through its historic streets or relaxing by the coast, September offers an ideal backdrop to experience the beauty of Angra do Heroísmo.

September Temperature in Angra do Heroismo

In September, Angra do Heroísmo enjoys a delightful transition into autumn, with temperatures that hold onto the warmth of summer. With minimums around 19°C (66°F) and highs reaching up to 24°C (76°F), the month boasts a pleasant average of 22°C (71°F). This marks a continuation of the summer warmth experienced in August, which sets the stage for ideal outdoor activities while avoiding the peak heat of July. As the month progresses, the mild temperatures create a tranquil ambiance, making it a fantastic time to explore the island’s stunning landscapes and rich history. With steady readings, September stands out as a perfect blend of summer's farewell and autumn's gentle embrace.

September Weather in Angra do Heroismo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Angra do Heroismo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec615959596265697271686462
Data source: Temperature data for Angra do Heroismo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Angra do Heroismo

In September, Angra do Heroísmo experiences a shift in precipitation as the summer warmth begins to fade. With 45 mm (1.8 in) of rainfall spread over 10 days, September marks a subtle increase compared to the preceding drier months of July and August. This transitional month bridges the gap to the wetter autumn season, as seen in the significant uptick of 83 mm (3.3 in) in October. The pattern reveals a natural progression from the hot, dry summer into the cooler, rainy fall, encapsulating the diverse climate of this picturesque region. As October approaches, residents and visitors alike should prepare for the rich, lush landscapes that follow the September rains.

September Precipitation Trends in Angra do Heroismo

The chart displays monthly precipitation patterns in Angra do Heroismo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec78774976544322474683107121
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Angra do Heroismo

September in Angra do Heroísmo, Portugal, sees a drop in humidity, averaging 82%. This marks a continuation of a trend observed since the peak of July's 86%, as summer transitions into autumn. The humidity levels in September are relatively stable, mirroring those of early spring months like May and August. Following a pattern of mild humidity, October further decreases to 79%, suggesting a gradual shift towards drier conditions as the year progresses. Overall, this month offers a comfortable atmosphere, making it an ideal time to explore the breathtaking landscapes of this coastal gem.

September Average Humidity in Angra do Heroismo

This chart illustrates the average monthly humidity levels in Angra do Heroismo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%84%84%83%84%86%82%82%79%80%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Angra do Heroismo

As summer transitions into fall, September in Angra do Heroísmo, Portugal, maintains a very high UV Index of 9, with a burn time of just 15 minutes. This reflects a slight decrease from the peak months of June and July, where the UV levels soared to an extreme 11. Visitors should remain vigilant, as the UV exposure remains significant, indicating that sun protection is still essential this time of year. Looking ahead, the UV Index will continue to decline into October, emphasizing the seasonal shift but still reminding us of the powerful sun in early autumn. For more detailed insights, check out the Angra do Heroismo UV Index.

Maximum UV Index Levels in Angra do Heroismo for September

The chart shows the monthly maximum UV Index (UVI) for Angra do Heroismo 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: Angra do Heroismo 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 Angra do Heroismo

In September, Angra do Heroísmo basks in a delightful 317 hours of sunshine, offering a warm embrace as summer begins its gentle farewell. This month stands out as a transition from the vibrant peak of July, which boasts the year's highest 380 hours of sunlight, to the more temperate days of autumn. With August's impressive 357 hours still lingering in the air, September provides a perfect blend of warmth and light, making it an ideal time for outdoor adventures. As the days grow shorter, this enchanting island still illuminates the path to serene moments under the sun, showcasing a gradual yet captivating decline in sunlight hours as it prepares for the cooler months ahead.

Monthly Sunshine Duration in Angra do Heroismo: September Highlighted

The September sunshine duration represents the total number of hours Angra do Heroismo 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.
JanFebMarAprMayJunJulAugSepOctNovDec147h204h261h290h336h353h380h357h317h266h205h194h
Data source: Angra do Heroismo September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Angra do Heroismo During September

In September, Angra do Heroísmo experiences a 40% chance of sunny weather, marking a pleasant transition from the summer months. This likelihood follows the peak of 50% in August, where golden days bask in the summer sun. As the seasons change, September still retains a favorable balance of sunshine, although it dips slightly compared to the summer's exuberance. This trend showcases a gradual decline in sunny days as the year progresses, with the chances of clear skies dropping to 34% in October. Overall, September remains a delightful month for those seeking sunlit adventures before autumn settles in.

Percentage of Sunny Days in September in Angra do Heroismo

The chart illustrates the percentage of sunny days in Angra do Heroismo 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 Angra do Heroismo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%28%27%30%32%43%41%50%40%34%26%30%
Data source: Angra do Heroismo September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Angra do Heroismo in September

As the warm embrace of summer gives way to autumn, September in Angra do Heroísmo reflects a gentle transition in daylight duration. With around 12 hours of daylight, this month marks a slight decline from the 13 to 14 hours enjoyed in the peak of summer. The gradual shortening of days signals the beginning of fall, leading into the cozy, dimmer months of October and November. This pattern illustrates a rhythmic return to shorter days, showcasing how the island's daylight ebbs and flows throughout the year, creating a unique charm that captivates both residents and visitors alike.

Average Daylight Hours in Angra do Heroismo for September

The chart illustrates the variation in daylight duration in Angra do Heroismo throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 47m10h 45m11h 58m13h 13m14h 17m14h 48m14h 32m13h 35m12h 23m11h 8m10h 3m9h 29m
Data source: Angra do Heroismo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Angra do Heroismo

In September, Angra do Heroísmo experiences a gentle breeze with an average wind speed of 6.2 m/s (14 mph), continuing a trend of milder winds that began in June. This marks a slight increase from the summer months, where wind speeds hovered around 6.1 m/s in August and 6.3 m/s in July. As autumn approaches, the overall wind pattern reflects a calming from the more blustery winter months, which can reach highs of 11.1 m/s (25 mph) in February. The transition from summer to fall offers visitors a pleasant environment to enjoy the island's beauty, balancing tranquility with the invigorating energy that characterizes Angra do Heroísmo’s coastal climate.

Average September Wind Speed in Angra do Heroismo

The chart displays monthly wind speed patterns in Angra do Heroismo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec10.411.16.68.06.64.86.36.16.2 m/s6.68.48.9
Data source: Angra do Heroismo September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Angra do Heroismo Compares to Other Months

The weather in Angra do Heroismo 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 Angra do Heroismo and find detailed weather information for every month.

In comparing the weather of September and January, it’s clear that September is generally warmer, with average temperatures ranging from 19°C (66°F) to 24°C (76°F), while January sees lower temperatures, averaging between 11°C (52°F) and 19°C (66°F). Although September has slightly lower precipitation (45 mm over 10 days) compared to January's 78 mm over 11 days, the humidity levels are similar, with both months hovering around the 80% mark. For more detailed insights on January weather, you can visit Angra do Heroismo weather in January.

In comparing the weather of September and February, September typically enjoys warmer temperatures, with an average of 22°C (71°F) and minimal rain, averaging 45 mm over about 10 days. In contrast, February is cooler, with an average temperature of 15°C (59°F) and increased precipitation, totaling 77 mm over approximately 13 days. Both months exhibit high humidity, around 82% for September and 83% for February, creating a relatively damp atmosphere. For more specific insights on February weather in the region, check out Angra do Heroismo weather in February.

In September, the weather tends to be warmer with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 24°C (76°F), creating a pleasant late summer vibe. The month typically sees around 45 mm (1.8 in) of precipitation spread over 10 days, with humidity levels at 82%. In contrast, March experiences cooler temperatures, averaging between 10°C (50°F) and 18°C (64°F), as the region transitions into spring. Precipitation is slightly higher at 49 mm (1.9 in) over 9 days, with humidity levels rising marginally to 84%. For a detailed comparison, you can check the Angra do Heroismo weather in March.

In comparing the weather between September and April, one can observe distinct differences in temperature and precipitation patterns. September enjoys milder temperatures, with a minimum of 19°C (66°F), averaging 22°C (71°F), and reaching a maximum of 24°C (76°F). In contrast, April sees cooler temperatures, with a minimum of 10°C (51°F) and a maximum of 18°C (64°F), averaging just 15°C (60°F). Additionally, April is characterized by higher precipitation, with 76 mm (3.0 in) over 13 days, compared to September's 45 mm (1.8 in) spread across 10 days. Humidity levels are relatively similar, with September at 82% and April slightly higher at 84%. For more detailed insights into April's climate, you can explore the information available here: Angra do Heroismo weather in April.

When comparing the weather in September and May, September boasts warmer temperatures, with a daily average of 22°C (71°F) compared to May's cooler 16°C (62°F). While September experiences slightly less precipitation, totaling 45 mm over about 10 days, May sees 54 mm over 8 days, making it a bit rainier. Both months feature high humidity levels, with September at 82% and May slightly higher at 83%. For more specific details on May weather, you can visit Angra do Heroismo weather in May.

In comparing the weather between September and June, September tends to be warmer, with a minimum temperature of 19°C (66°F) and an average of 22°C (71°F), while June starts off cooler with a minimum of 15°C (58°F) and an average of 19°C (66°F). The maximum temperatures in both months are similar, with September reaching up to 24°C (76°F) and June peaking at 22°C (72°F). Precipitation remains fairly consistent, with September receiving 45 mm (1.8 in) over about 10 days, compared to June's 43 mm (1.7 in) across only 6 days. Humidity levels are relatively high in both months, slightly higher in June at 84% versus September's 82%. For more detailed information, check out Angra do Heroismo weather in June.

When comparing the weather in September to that of July, we observe a slight increase in average temperatures, with September averaging 22°C (71°F) compared to July's 21°C (70°F). Both months feature similar minimum temperatures of 18°C (65°F) and 19°C (66°F) respectively, but September peaks at a slightly higher maximum of 24°C (76°F) versus July's 23°C (74°F). In terms of precipitation, September experiences more rainfall with 45 mm (1.8 in) spread over 10 days, while July sees only 22 mm (0.8 in) over just 3 days. Humidity levels are also noteworthy, remaining relatively high at 82% in September, just slightly lower than July's 86%. For more insights, check out Angra do Heroismo weather in July.

In comparing the weather of September to August, we see similarities in temperature with both months having a minimum of 19°C (66°F), an average of around 22°C (71-72°F), and a maximum of 24°C (76°F). However, September experiences slightly less precipitation, with 45 mm (1.8 in) over 10 days, compared to August's 47 mm (1.9 in) over 8 days. Both months maintain a humidity level of 82%, contributing to a comfortable yet moist atmosphere. For more specific details on August weather, you can visit Angra do Heroismo weather in August.

In September, the weather is generally warmer with a minimum temperature of 19°C (66°F) and an average of 22°C (71°F), while October sees a slight drop with minimums of 15°C (58°F) and an average of 20°C (69°F). Both months experience similar maximum temperatures peaking at 24°C (76°F). However, October tends to be wetter, receiving 83 mm (3.3 in) of precipitation over 12 days compared to September's 45 mm (1.8 in) over 10 days. Humidity remains relatively high in both months, with September at 82% and October slightly lower at 79%. For more specific details, you can check Angra do Heroismo weather in October.

In September, the weather is generally warmer, with average temperatures around 22°C (71°F), while November sees a drop in average temperatures to about 18°C (65°F). The maximum temperatures in September reach up to 24°C (76°F), compared to November's upper limit of 22°C (71°F). However, November is much wetter, with 107 mm (4.2 in) of precipitation over 14 days, compared to September's 45 mm (1.8 in) over 10 days. Humidity levels remain similar, with September at 82% and November at 80%. For more detailed information, you can check Angra do Heroismo weather in November.

In September, the weather tends to be warmer, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 24°C (76°F). The month experiences moderate precipitation, totaling 45 mm (1.8 in) over approximately 10 days, and the humidity is relatively high at 82%. In contrast, December brings cooler temperatures, with averages dipping to a minimum of 12°C (54°F) and a maximum of 20°C (68°F). This month sees significantly more rain, with 121 mm (4.8 in) falling over 13 days, contributing to a slight increase in humidity at 85%. For a detailed look at December weather patterns, you can check Angra do Heroismo weather in December.

Compare Angra do Heroismo's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Angra do Heroismo

In September, Angra do Heroismo experiences a delightful transition into autumn, with temperatures remaining pleasantly warm and balanced compared to the sweltering summer months. The average warmth provides a comfortable backdrop for outdoor activities, while the increased humidity begins to signal the shift toward the rainier season. With around 10 days of precipitation, it's wise to pack a light raincoat, though the amount is manageable and does not overshadow the region's natural charm. For those seeking a unique blend of warm days and refreshing breezes, September offers an ideal climate. To learn more about the weather patterns throughout the year, visit Angra do Heroismo Climate.