Mar del Plata weather in July
In July, Mar del Plata has daytime highs averaging 12 °C, nights around 6.0 °C, with 6.0 wet days, and a sea temperature of 11 °C. Figures are 1991–2020 climate normals.
- 11.8°C Average high
- 6.0°C Average low
- 6.0days Wet days
- 50mm Rainfall
- 10.9°C Sea temperature
- 9.8h Daylight
Daily temperatures through July
How July develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 July | 11.7 °C | 5.9 °C | 17 % |
| 11–20 July | 11.7 °C | 6.0 °C | 21 % |
| 21–31 July | 12.0 °C | 6.0 °C | 20 % |
What to expect
| Measure | Typical July | Share of the month |
|---|---|---|
| Days above 25 °C | 0 of 31 | 0 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 0.3 of 31 | 1 % |
| Days with more than 1 mm rain | 6.0 of 31 | 19 % |
Conditions in July
| Measure | Average |
|---|---|
| Mean temperature | 8.6 °C |
| Record high (1991–2020) | 22 °C |
| Record low (1991–2020) | -1.3 °C |
| Relative humidity | 78 % |
| Wind speed | 23 km/h |
| Cloud cover | 60 % |
Where Mar del Plata ranks in July
| Ranking | Position | Value |
|---|---|---|
| The coolest places in South America in July | 4thof 50 | 12 °C |
| The coolest places in the world in July | 11thof 50 | 12 °C |
July compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| May | 15.8 °C | 45 mm | 60 % |
| June | 12.9 °C | 52 mm | 60 % |
| July | 11.8 °C | 50 mm | 60 % |
| August | 13.5 °C | 55 mm | 57 % |
| September | 14.7 °C | 57 mm | 57 % |
See all twelve months for Mar del Plata
- July is the 12th warmest month here.
- It is the 2nd driest month of the year.
- It ranks 12th for least cloud cover.
- Days last about 9.8 hours from sunrise to sunset.
- It rains on 6.0 of 31 days — 19 % of the month.
- Nights are about 5.9 °C cooler than the middle of the day.
- The hottest July day on record since 1991 reached 22 °C, 10 °C above the usual daytime high.
- Beach score: 19 / 100 — see how this is calculated.
Nearby destinations in July
| Destination | Avg high | Wet days | Sea |
|---|---|---|---|
| Mar del Plata | 12 °C | 6.0 | 11 |
| La Plata | 13 °C | 6 | 12 |
| Montevideo | 13 °C | 7 | 11 |
| Avellaneda | 14 °C | 7 | 13 |
QuestionsJuly in Mar del Plata, answered
How warm is Mar del Plata in July?
Daily highs average 12 °C and nights fall to about 6.0 °C, a spread of 5.9 °C between afternoon and dawn. That makes July the 12th warmest month of the year here.
Does it rain much in Mar del Plata in July?
July averages 50 mm of rain, spread over about 6 of the 31 days — 19 % of the month. Cloud cover averages 60 % of the sky.
Is the sea warm enough to swim in July?
The sea averages 11 °C off Mar del Plata in July. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in July?
Mar del Plata averages 9.8 hours between sunrise and sunset in July. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.