Your December weather guide
MildWeather in Mellieha in December
December is a reasonable time for Mellieha if you want mild weather rather than a beach holiday. Daytime highs average around 16°C, compared with 7.7°C in London, but about 10 rainy days mean you should keep plans flexible. It suits travellers happy to walk in layers, take advantage of brighter spells and spend wet periods indoors. If warm evenings and comfortable sea swimming are essential, December is not the right choice.
Long-term climate averages for Mellieħa, not a forecast · 1991-2020
Mellieha, month by month
Your snapshot
At a glance
The useful details for Mellieħa.
- Average daytime high
- 15.9°C
- 9 in 10 days stay below 18°C
- Average night-time low
- 13.3°C
- coldest 10% of nights: 10°C or lower
- Compared with London
- +8.2°C
- London averages 7.7°C in December
- Sea temperature
- 18.1°C
- year to year: 18°C to 19°C
- Sunshine per day (est.)
- 4.9h
- 51% of 9.6 h of daylight
- Rainy days (1 mm+)
- 10
- 73 mm over the month
- Humidity
- 68%
- Days over 25°C
- 0%
- none over 30°C
- Record high 1991-2020
- 22.4°C
- 2010-12-01
- Record low 1991-2020
- 5.2°C
- 2014-12-31
- Flight from London
- ≈ 3 h 18 min
- 2048 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How December compares
December is the 9th warmest month of the year in Mellieha. Within Malta it is 4th of 4 (Malta in December). Against London's average high of 7.7°C in December, Mellieha is 8.2°C warmer by day and 10.6°C warmer at night.
Daytime and night-time in December
The typical December day in Mellieha peaks at 15.9°C, but that is an average: the warmest 10% of days reach 18.0°C or more. Days over 25°C are rare. Nights average 13.3°C; one night in ten drops to 10.4°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest December day here reached 22.4°C (2010-12-01) and the coldest night 5.2°C (2014-12-31).
Rain in December
Wet (more than 8 rainy days): about 10 days with 1 mm or more, 73 mm in total. Year to year it varies a lot - the wettest December was 1991 with 165 mm, the driest 2018 with 16 mm. Humidity averages 68%.
Sea temperature in December
The sea averages 18.1°C - bracing (18-22°c). Depending on the year it ranges from 17.7°C to 18.7°C. For the warmest sea here, come in August (26.6°C).
Sunshine and daylight
Around 4.9 hours of sunshine a day (estimated from cloud cover), 9.6 hours of daylight: the sun rises about 07:06 and sets about 16:50 local time in mid-December. Average cloud cover is 49%.
Is December a good time to visit Mellieha?
December is not the strongest month here: mild days and frequent rain. The best months for Mellieha on our scoring are July, June, August; months averaging 25°C or more: Jul, Aug, Sep.
Mild days, cooler evenings
The daytime temperature is comfortable for walking with a light jacket, but not reliably warm enough for sitting outside in summer clothes. Nights average around 13°C, so pack a jumper and an outer layer rather than relying on daytime warmth to last. The warmer days can reach 18°C or more, while the colder nights can fall to around 10°C or below. Layers give you more flexibility than packing for either winter cold or summer heat alone. Midday is a sensible time to try eating or relaxing outdoors if it feels comfortable, but warmth should be a bonus rather than the basis of your plans.
Plan around rain and a bracing sea
Rain is the main catch: December is wet enough that a waterproof jacket and shoes you are comfortable wearing in rain deserve space in your bag. Allow room to move outdoor plans around rather than fixing everything in advance. There is still useful daylight, with about 4.9 hours of sunshine out of 9.6 hours of daylight, but that does not promise a bright spell whenever you want it. The sea averages 18.1°C, which is bracing rather than comfortably warm. Treat swimming as optional if you already enjoy cooler water; for a holiday built around relaxed sea bathing, the conditions are a poor match.
A little perspective
Mellieha through the year
December is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 14.2°C | 11.6°C | 16.1°C | 5.2 | 56 | 9 | 0% |
| February | 14.0°C | 11.1°C | 15.2°C | 6.1 | 52 | 8 | 0% |
| March | 15.1°C | 12.1°C | 15.2°C | 7.2 | 32 | 6 | 0% |
| April | 17.0°C | 13.7°C | 16.1°C | 8.3 | 16 | 4 | 0% |
| May | 20.1°C | 16.5°C | 18.5°C | 9.9 | 6 | 2 | 1% |
| Junebest | 24.0°C | 19.9°C | 22.2°C | 12.2 | 3 | 1 | 31% |
| Julybest | 26.8°C | 22.6°C | 25.2°C | 13.7 | 0 | 0 | 89% |
| Augustbest | 27.8°C | 23.7°C | 26.6°C | 12.4 | 3 | 1 | 99% |
| September | 25.6°C | 22.3°C | 25.7°C | 8.9 | 32 | 4 | 66% |
| October | 22.8°C | 19.7°C | 23.8°C | 6.5 | 52 | 7 | 10% |
| November | 19.2°C | 16.4°C | 21.1°C | 5.3 | 69 | 9 | 0% |
| DecemberSelected | 15.9°C | 13.3°C | 18.1°C | 4.9 | 73 | 10 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in December
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Mellieha in December FAQs
Plain answers, grounded in the averages.
Is Mellieha hot in December?
Mellieha is mild in December: the average daytime high is 15.9°C and nights average 13.3°C. Days over 25°C are rare in December.
Can you swim in the sea in Mellieha in December?
The sea around Mellieha averages 18.1°C in December, which is bracing - fine for a quick dip, cool for long swims. Between 1991 and 2020 it ranged from 18°C to 19°C depending on the year.
How much does it rain in Mellieha in December?
Mellieha sees about 10 rainy days (1 mm or more) and 73 mm of rain in a typical December. The wettest December between 1991 and 2020 was 1991 (165 mm) and the driest was 2018 (16 mm).
How sunny is Mellieha in December?
Mellieha gets around 4.9 hours of sunshine a day in December out of 9.6 hours of daylight (estimated from average cloud cover).
How does Mellieha compare with the UK in December?
Mellieha is on average 8.2°C warmer than London by day in December (15.9°C against 7.7°C).
What is the hottest December on record in Mellieha?
Between 1991 and 2020 the hottest December day in Mellieha reached 22.4°C on 2010-12-01, and the coldest night dropped to 5.2°C on 2014-12-31.
How much warmer is Mellieha than London in December?
Mellieha's average daytime high is 15.9°C, which is 8.2°C warmer than London's 7.7°C. That is a useful difference for spending time outdoors, but it still calls for layers rather than a suitcase packed only with summer clothes.
Is December a good choice for a short break?
It can be, provided your plans are flexible. The flight from London takes about 3 h 18 min, and mild daytime weather suits time outdoors. Rain is the drawback, so a short stay should not depend on uninterrupted sunshine.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Mellieħa. Sea temperature from the nearest 5 km sea cell, 2.3 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C