September weather forecast
Valletta, Malta

September signals the seasonal shift from summer to autumn bringing a certain cooling down effect to Valletta's weather pattern. Nevertheless, it remains comfortably warm during the day with temperatures gently receding from the summer highs. An increase in rainfall to 40mm (1.57") signifies a transition, returning life to the city's flora after months of aridity. Sea temperature still clocks in a pleasant 25.7°C (78.3°F), inviting last-minute summer swims. Equally, the UV index does slide down to a safer level of 7.

Temperature

September's onset sees an average high-temperature of a moderately hot 28°C (82.4°F), exhibiting a slight fluctuation from the previous month. During September, Valletta witnesses a consistent average low-temperature of 20.1°C (68.2°F).

Rainfall

In Valletta, in September, during 4 rainfall days, 40mm (1.57") of precipitation is typically accumulated. In Valletta, during the entire year, the rain falls for 80 days and collects up to 553mm (21.77") of precipitation.

Sea temperature

In Valletta, in September, the average water temperature is 25.7°C (78.3°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In Valletta, the average length of the day in September is 12h and 24min.
On the first day of September, sunrise is at 6:34 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:47 pm CEST.

Sunshine

In Valletta, the average sunshine in September is 9h.

UV index

The average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. To cut down UV radiation exposure by about half, sport a wide-brim hat. Caution! The Sun's UV rays become stronger due to reflections from water and sand.