SeasonMapMar del Plata weather in December
Argentina
December in Mar del Plata: warm, rainy, with clean air — an excellent time to visit.
#4 of 12 months in Mar del Plata · #397 of 1383 destinations to visit in December · comfort 82/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mar del Plata in December
Other months in Mar del Plata
Mar del Plata's forum calls January ultra-peak season on the Argentine coast, warm but not unbearable, with the beaches at their most crowded of the year. Regulars flag it as the height of the Christmas-to-February summer holiday stretch, and suggest early March as a calmer, still-warm alternative once schools are back in session.
Add your own note from Mar del Plata's card on the map.
Mar del Plata climate normals — December
| Daytime high | 27°C / 80°F | 🌤 warm |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Feels like (high) | 27°C / 81°F | |
| Sea temperature | 18°C / 65°F | 🧊 bracing |
| Rainfall | 84 mm / 3.3 in | 🌧 rainy |
| Rainy days | 9 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 12.2 h/day | |
| Daylight | 14.7 h | |
| Wind | 25 km/h / 15 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mar del Plata in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsArgentine summer season, Summer holidays in Argentina, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Mar del Plata's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherMar del Plata's weather peaks January–March.
Best weatherFair weatherToughest weather
What's on in Mar del Plata in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Argentine summer season
15 Dec – 28 FebSchool holidaysCrowdedBook earlyThe city's population multiplies from mid-December, Bristol beach is sold by the tent and the coast road queues both ways on a Sunday. February is marginally calmer than January.
- Season
Summer theatre season
20 Dec – 28 Feb · usuallySummer season opensHalf of Buenos Aires theatre moves down the coast for the summer and the Avenida Independencia bills comedies and revues nightly. It is the reason a lot of Argentines come at all.
Where is Mar del Plata?
Mar del Plata in December — FAQ
- Is December a good time to visit Mar del Plata?
- December in Mar del Plata: warm, rainy, with clean air — an excellent time to visit. It ranks #4 of 12 months for Mar del Plata on SeasonMap's comfort score (82/100).
- What is the weather like in Mar del Plata in December?
- In December, Mar del Plata averages a daily high of 26.6°C and a low of 13.2°C, with about 84 mm of rain over roughly 9.3 rainy days.
- What is the air quality in Mar del Plata in December?
- Mar del Plata has a mean US Air Quality Index of about 30 in December.