September weather forecast
Graciosa, Portugal

The first month of the autumn, September, is also an agreeable month in Graciosa, Portugal, with an average temperature varying between 22°C (71.6°F) and 16°C (60.8°F).

Temperature

Graciosa records an average high-temperature of a pleasant 22°C (71.6°F) as September arrives, nearly mirroring the previous month's climate. Graciosa records an average low of 16°C (60.8°F) throughout the nights in September.

Rainfall

In Graciosa, during September, the rain falls for 14 days and regularly aggregates up to 86mm (3.39") of precipitation. Throughout the year, in Graciosa, there are 184 rainfall days, and 1114mm (43.86") of precipitation is accumulated.

Sea temperature

The months with the warmest seawater in Graciosa are August and September, with an average sea temperature of 23°C (73.4°F).
Note: Swimming in 23°C (73.4°F) can be enjoyable or not, depending on how you feel about the cold and conditions such as sunshine, wind, and the day's temperature. FYI: Olympic standards dictate waters of 25°C (77°F) to 28°C (82.4°F).

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 07:21 and sunset at 20:22. On the last day of the month, sunrise is at 07:47 and sunset at 19:36 +00.

Sunshine

In September, the average sunshine in Graciosa is 6h.

UV index

In September, the average daily maximum UV index in Graciosa is 7. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The Sun's UV rays become stronger due to reflections from water and sand.