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

The arrival of September denotes a barely perceptible change in the average high-temperatures to a warm 28°C (82.4°F) from August's 30.7°C (87.3°F). During September, Valletta experiences an average low-temperature of 20.1°C (68.2°F) at night.

Rainfall

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

Sea temperature

In September, the average sea 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 very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

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

Sunshine

The average sunshine in September is 9h.

UV index

In Valletta, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be mindful! Sand and water reflections can up the Sun's UV exposure.