Climate averages 1991–2020
Mar del Plata weather
in December.
A warm, moderately wet month: the 3rd warmest and the 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Mar del Plata: daytime highs average 23.7°C and nights cool to about 14.9°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 69 mm of rain on roughly 8 days, which makes December a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 44 min on an average December day.
The nearest other city in this atlas is Necochea (120 km away). In December its highs average 23.0°C, 0.7°C cooler than Mar del Plata, with 65 mm of rain.
Among the 67 cities listed in Argentina, Mar del Plata ranks 62nd of 67 for the warmest December highs and 16th of 67 for the driest December (rainfall, lowest first). The mean December high of those 67 cities is 27.9°C; Mar del Plata is 4.2°C cooler than that mean.
From December to January, average highs rise by 1.4°C to 25.1°C, and monthly rainfall rises from 69 mm to 77 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Mar del Plata climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.1°C16.7°C | 16.7°C | 77 | 8.3 | 14.514 h |
| February | 24.3°C16.8°C | 16.8°C | 77 | 7.5 | 13.514 h |
| March | 22.5°C15.5°C | 15.5°C | 72 | 8.1 | 12.412 h |
| April | 19.0°C12.5°C | 12.5°C | 77 | 8.6 | 11.111 h |
| May | 15.7°C9.9°C | 9.9°C | 49 | 6.8 | 10.110 h |
| June | 12.9°C7.1°C | 7.1°C | 60 | 6.9 | 9.610 h |
| July | 11.8°C5.8°C | 5.8°C | 54 | 7.0 | 9.810 h |
| August | 13.5°C6.6°C | 6.6°C | 60 | 7.0 | 10.711 h |
| September | 14.7°C7.5°C | 7.5°C | 60 | 7.4 | 11.812 h |
| October | 17.3°C9.8°C | 9.8°C | 80 | 9.0 | 13.013 h |
| November | 20.5°C12.3°C | 12.3°C | 77 | 9.3 | 14.114 h |
| December, selected | 23.7°C14.9°C | 14.9°C | 69 | 8.0 | 14.715 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Necochea in DecemberArgentina · 120 kmHigh 23.0°C · Low 15.0°C · 65 mm rain
- Tandil in DecemberArgentina · 158 kmHigh 25.9°C · Low 13.7°C · 76 mm rain
- Mar del Tuyú in DecemberArgentina · 176 kmHigh 22.0°C · Low 17.5°C · 65 mm rain
- Olavarría in DecemberArgentina · 273 kmHigh 26.6°C · Low 14.7°C · 80 mm rain
- San Vicente in DecemberArgentina · 340 kmHigh 27.4°C · Low 16.8°C · 86 mm rain
- La Plata in DecemberArgentina · 344 kmHigh 26.1°C · Low 18.1°C · 82 mm rain
- Berisso in DecemberArgentina · 349 kmHigh 26.0°C · Low 18.4°C · 76 mm rain
- Ezeiza in DecemberArgentina · 360 kmHigh 27.5°C · Low 17.2°C · 85 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Mar del Plata) is explained once on the Mar del Plata year overview and on the Sources, method and limits page.