September weather forecast
Angra do Heroísmo, Portugal

The first month of the autumn, September, is also a moderately hot month in Angra do Heroísmo, Portugal, with an average temperature varying between 18.5°C (65.3°F) and 24°C (75.2°F).

Temperature

The dawn of September sees an average high-temperature of a still moderately hot 24°C (75.2°F), subtly contrasting with August's 25.1°C (77.2°F). Angra do Heroísmo throughout September, experiences an average nighttime temperature of 18.5°C (65.3°F).

Rainfall

In September, in Angra do Heroísmo, the rain falls for 14 days. Throughout September, 90mm (3.54") of precipitation is accumulated. In Angra do Heroísmo, during the entire year, the rain falls for 188 days and collects up to 1099mm (43.27") of precipitation.

Sea temperature

In September, the average sea temperature in Angra do Heroísmo is 22.9°C (73.2°F).
Note: Every individual's cold threshold differs, but factors like today's sunshine, wind, and temperature can tip the scales for a delightful swim in 22.9°C (73.2°F) waters. For reference, Olympians swim in waters of 25°C (77°F) to 28°C (82.4°F).

Daylight

In Angra do Heroísmo, the average length of the day in September is 12h and 26min.
On the first day of September in Angra do Heroísmo, sunrise is at 07:18 and sunset at 20:18. On the last day of the month, sunrise is at 07:44 and sunset at 19:33 +00.

Sunshine

The average sunshine in September in Angra do Heroísmo, Portugal, is 6h.

UV index

The average daily maximum UV index in September in Angra do Heroísmo is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.