September weather forecast
Herceg Novi, Montenegro

As September unfolds, Herceg Novi experiences a gradual transition from the high of summer to the mellow autumnal weather. While the temperatures remain considerably warm, they start to show a slight downward trend compared to August. Marked by moderately warm days and cool nights, the weather remains welcoming for sea baths with sea temperatures averaging at 23°C (73.4°F). Similarly, the number of daylight hours decreases, signaling the imminent arrival of the autumnal equinox. The change in season paints the town in hues of gold, creating a picturesque environment that combines natural beauty with historical grandeur.

Temperature

As August makes way for September, Herceg Novi's average high-temperature eases from 29.4°C (84.9°F) to a still moderately hot 26.1°C (79°F). During September, Herceg Novi's temperature falls to a steady low-temperature average of 16.6°C (61.9°F).

Rainfall

In Herceg Novi, during September, the rain falls for 7.8 days and regularly aggregates up to 142mm (5.59") of precipitation. Throughout the year, there are 128.6 rainfall days, and 1916mm (75.43") of precipitation is accumulated.

Sea temperature

In Herceg Novi, in September, the average water temperature is 23°C (73.4°F).
Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 23°C (73.4°F).

Daylight

In September, the average length of the day in Herceg Novi is 12h and 29min.
On the first day of September, sunrise is at 06:11 and sunset at 19:20. On the last day of the month, sunrise is at 06:42 and sunset at 18:29 CEST.

Sunshine

In September, the average sunshine is 8.3h.

UV index

In Herceg Novi, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.