Climate averages 1991–2020
Mar del Plata weather
in September.
A cool, moderately wet month: the 9th warmest and the joint 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Mar del Plata: daytime highs average 14.7°C and nights cool to about 7.5°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 60 mm of rain on roughly 7 days, which makes September a moderately wet month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 49 min on an average September day.
The nearest other city in this atlas is Necochea (120 km away). In September its highs average 14.3°C, about as warm as Mar del Plata, with 56 mm of rain.
Among the 67 cities listed in Argentina, Mar del Plata ranks 62nd of 67 for the warmest September highs and 26th of 67 for the driest September (rainfall, lowest first). The mean September high of those 67 cities is 19.4°C; Mar del Plata is 4.7°C cooler than that mean.
From September to October, average highs rise by 2.6°C to 17.3°C, and monthly rainfall rises from 60 mm to 80 mm.
The annual picture
September 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, selected | 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 | 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
September in nearby cities
- Necochea in SeptemberArgentina · 120 kmHigh 14.3°C · Low 7.8°C · 56 mm rain
- Tandil in SeptemberArgentina · 158 kmHigh 16.0°C · Low 5.8°C · 59 mm rain
- Mar del Tuyú in SeptemberArgentina · 176 kmHigh 13.8°C · Low 9.8°C · 74 mm rain
- Olavarría in SeptemberArgentina · 273 kmHigh 16.8°C · Low 6.4°C · 62 mm rain
- San Vicente in SeptemberArgentina · 340 kmHigh 18.0°C · Low 8.6°C · 72 mm rain
- La Plata in SeptemberArgentina · 344 kmHigh 17.0°C · Low 10.0°C · 72 mm rain
- Berisso in SeptemberArgentina · 349 kmHigh 17.0°C · Low 10.3°C · 81 mm rain
- Ezeiza in SeptemberArgentina · 360 kmHigh 18.1°C · Low 9.0°C · 72 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.