September weather forecast
Sliema, Malta

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Weather in September

September distinguishes itself with a decline in temperatures to 25.7°C (78.3°F), signifying the onset of autumn's mildness. Compared to August, rainfall starts to make a perceptible return with 23mm (0.91") precipitation. This period of the year in Sliema characterizes a tranquil weather phase, where the summer's high heat is replaced by more temperate ambiance. As the Mediterranean Sea maintains its warmth at 25.7°C (78.3°F), a second wave of beach activities commences. The UV index and daylight hours undergo a slight decrease, hinting at autumn.

Temperature

The ushering in of September in Sliema brings an average high-temperature of a still warm 25.7°C (78.3°F), closely mirroring the 27.4°C (81.3°F) of August. Sliema registers a gentle descent to an average nighttime low of 24.6°C (76.3°F) in September from its daytime highs.

Humidity

In September, the average relative humidity is 71%.

Rainfall

In Sliema, Malta, during September, the rain falls for 8 days and regularly aggregates up to 23mm (0.91") of precipitation. Throughout the year, there are 107.6 rainfall days, and 347mm (13.66") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 25.7°C (78.3°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

In Sliema, the average length of the day in September 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, in Sliema, sunrise is at 6:56 am and sunset at 6:47 pm CEST.

Sunshine

In September, the average sunshine is 11h.

UV index

In Sliema, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 6 during September leads to these instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Watch out! Reflections from sand and water can surge UV radiation exposure.
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Frequently asked questions

What is the usual temperature for Sliema in September?

In September, in Sliema, the average high-temperature is 25.7°C (78.3°F), and the average low-temperature is 24.6°C (76.3°F). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in August is estimated at 30°C (86°F).

What is the average humidity in September in Sliema?

In Sliema, the average relative humidity in September is 71%.

How much does it rain in Sliema in September?

In September, in Sliema, the rain falls for 8 days. Throughout September, 23mm (0.91") of precipitation is accumulated.

What is the water temperature in September in Sliema?

In Sliema, Malta, in September, the average water temperature is 25.7°C (78.3°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Sliema have in September?

The average day length in September in Sliema is 12h and 24min.

When is the sunrise / sunset in September in Sliema?

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.

How long on average sun shines in September in Sliema?

In Sliema, Malta, the average sunshine duration in September is 11h.

What is the UV index intensity in September in Sliema?

In Sliema, Malta, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.

Average temperature in September
Sliema, Malta

Average temperature in September - Sliema, Malta
  • Average high temperature in September: 25.7°C

The warmest month (with the highest average high temperature) is August (27.4°C).
The month with the lowest average high temperature is February (14.9°C).

  • Average low temperature in September: 24.6°C

The month with the highest average low temperature is August (26.4°C).
The coldest month (with the lowest average low temperature) is February (13.5°C).

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Average pressure in September
Sliema, Malta

Average pressure in September - Sliema, Malta
  • Average pressure in September: 1015.4mbar

The month with the highest atmospheric pressure is December (1019.3mbar).
The month with the lowest atmospheric pressure is July (1013.9mbar).

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Average wind speed in September
Sliema, Malta

Average wind speed in September - Sliema, Malta
  • Average wind speed in September: 17.7km/h

The windiest month (with the highest average wind speed) is January (27.9km/h).
The calmest month (with the lowest average wind speed) is August (13.2km/h).

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Average humidity in September
Sliema, Malta

Average humidity in September - Sliema, Malta
  • Average humidity in September: 71%

The month with the highest relative humidity is April (77%).
The month with the lowest relative humidity is December (69%).

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Average rainfall in September
Sliema, Malta

Average rainfall in September - Sliema, Malta
  • Average rainfall in September: 23mm

The wettest month (with the highest rainfall) is November (76mm).
The driest month (with the least rainfall) is July (1mm).

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Average rainfall days in September
Sliema, Malta

Average rainfall days in September - Sliema, Malta
  • Average rainfall days in September: 8 days

The month with the highest number of rainy days is November (15.6 days).
The month with the least rainy days is July (0.9 days).

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Average sea temperature in September
Sliema, Malta

Average sea temperature in September - Sliema, Malta
  • Average sea temperature in September: 25.7°C

The best month for swimming (with the highest average sea temperature) is August (26.1°C).
The coldest months (with the lowest average sea temperature) are February and March (15.4°C).

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Average daylight in September /
Average sunshine in September
Sliema, Malta

Average daylight in September / Average sunshine in September - Sliema, Malta
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 11h and 0min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).

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Average sunshine days in September
Sliema, Malta

Average sunshine days in September - Sliema, Malta
  • Average sunshine days in September: 19.5 days

The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is November (12 days).

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Average UV index in September
Sliema, Malta

Average UV index in September - Sliema, Malta
  • Average UV index in September: 6

The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).

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Average cloud cover in September
Sliema, Malta

Average cloud cover in September - Sliema, Malta
  • Average cloud cover in September: 15

The month with the most cloud cover is January (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in September
Sliema, Malta

Average visibility in September - Sliema, Malta
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Sliema, Malta

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