September weather forecastSliema, Malta
September
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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).
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).
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).
Average daylight in September /
Average sunshine in September
Sliema, Malta
- Average daylight in September: 12h and 24min
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).
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).
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).
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).
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).
