Mar del Plata weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Excellent
Best time to visit: October – April
What is the weather like in Mar del Plata in December?
In December, Mar del Plata is warm: daytime highs average 24 °C, and nights cool down to about 15 °C. The sea averages 17.6 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 73 mm. All in all, December is an excellent month for a holiday in Mar del Plata.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 78 | 80 | 82 |
| Day | 21° | 24° | 25° |
| Night | 12° | 15° | 17° |
| Sea | 15° | 18° | 20° |
| Sun | 6 h | 6 h | 6 h |
| Rain days | 9 | 8 | 8 |
More details for December
- Daylight
- 14 h 46 min05:22 – 20:09
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 2 daysdew point 18 °C or moreAll months
- Wind
- 26 km/haverage daily peakAll months
- Cloud cover
- 44 %on averageAll months
- Hot days
- 2 days30 °C or moreAll months
- Time zone
- UTC−3America/Argentina/Buenos_Aires
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %45 %
- Few rainy daysweight 30 %69 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Mar del Plata in December: quick answers
Is Mar del Plata hot in December?
Warm rather than hot: in December, daytime highs in Mar del Plata average 24 °C and nights cool to about 15 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Mar del Plata in December?
Only if you don't mind cold water: in December the sea averages just 17.6 °C. Comfortable swimming is possible from February to March.
Does it rain much in Mar del Plata in December?
Rain falls on about 8 days, adding up to 73 mm.
Mar del Plata month by month
The whole year in Mar del PlataAll destinations: ArgentinaWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences