Weather in Mellieha in September

How September compares

September is the 3rd warmest month of the year in Mellieha. Within Malta it is 4th of 4 (Malta in September). Against London's average high of 18.6°C in September, Mellieha is 7.0°C warmer by day and 11.1°C warmer at night.

Daytime and night-time in September

The typical September day in Mellieha peaks at 25.6°C, but that is an average: the warmest 10% of days reach 27.8°C or more. About 66% of days top 25°C and 1 in 125 pass 30°C. Nights average 22.3°C; one night in ten drops to 20.1°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 30.4°C (2020-09-23) and the coldest night 17.5°C (2008-09-29).

Rain in September

Some rain (4-8 rainy days): about 4 days with 1 mm or more, 32 mm in total. Year to year it varies a lot - the wettest September was 2003 with 121 mm, the driest 2014 with 0 mm. Humidity averages 73%.

Sea temperature in September

The sea averages 25.7°C - warm enough to swim (22°c+). Depending on the year it ranges from 24.9°C to 26.6°C. For the warmest sea here, come in August (26.6°C).

Sunshine and daylight

Around 8.9 hours of sunshine a day (estimated from cloud cover), 12.2 hours of daylight: the sun rises about 06:45 and sets about 19:10 local time in mid-September. Average cloud cover is 27%.

Is September a good time to visit Mellieha?

Yes - it is one of the better months: hot days, manageable rain and long sunny days. The best months for Mellieha on our scoring are July, June, August; months averaging 25°C or more: Jul, Aug, Sep.

Warm days, with little cooling after dark

Pack mainly for summer rather than a typical September at home. Days reach 25°C on 66% of occasions, so lightweight clothing is a sensible starting point. Midday can feel hot, particularly with humidity at 73%, and it makes sense to leave more energetic outings for the cooler parts of the day. Reaching 30°C is unusual rather than routine, which makes September a reasonable choice if you like warmth but dislike very high temperatures. Evenings offer limited relief from the heat: average lows are 22.3°C. A light layer is useful if you feel the cold, but heavy autumn clothing is unlikely to earn its space.

The sea is a strong reason to go

For a holiday built around swimming, September makes a convincing case. The sea averages 25.7°C, with a year-to-year range of 25°C to 27°C, so it is warm rather than bracing. That is a useful distinction if you enjoy spending time in the water rather than just taking a quick dip. Sunshine averages about 8.9 hours a day, leaving plenty of scope for outdoor time, although that is not a promise of uninterrupted sunshine. Pack swimwear and sun protection, and use shade when the warmth becomes tiring. The combination particularly suits travellers who prioritise comfortable sea temperatures over cooler weather for active days.

Allow for rain, but do not plan around it

Rain is a possible interruption rather than the main reason to rule September out. Mellieha averages about 4 rainy days during the month, so a light waterproof and some flexibility are more useful than assuming every day will be dry. That monthly average does not tell you when rain will arrive or how much of your own stay it might affect. Keep weather-dependent plans movable rather than tying everything to a fixed day. If guaranteed dry conditions are essential to your enjoyment, that is the catch here. If you can adjust plans when needed, the warm air and sea still make September an appealing choice.