Mendoza forecast: cold, winds, and frost mark the beginning of winter.

This weekend, the weather in Mendoza officially welcomes winter with a marked drop in temperature and unstable conditions. Although winter 2025 formally began at 11:42 p.m. on Friday, June 20, minutes before midnight, Saturday, June 21, already presents a typically wintery scenario with partial frost, Zonda winds, and possible snowfall in the mountains.

According to the Climate Contingency Directorate's forecast, Saturday will be partly cloudy, with a low of 2°C and a high of no more than 15°C. Zonda winds are expected in the foothills and Malargüe, while conditions in the high mountains are expected to worsen towards the afternoon.

A further drop in temperature is expected on Sunday the 22nd. It will be a cold, windy, and partly cloudy day, with moderate to strong southerly winds. Snowfall is expected in the mountainous areas in the morning due to the arrival of a cold front. The maximum temperature will be 13°C, while the minimum will fall back to 2°C.

Monday, June 23rd and Tuesday, June 24th, will be stable: few clouds, general frost, and light northeasterly winds. Minimum temperatures will drop to 0°C and -1°C respectively, while maximum temperatures will range between 13°C and 16°C. In the high mountains, the sky will remain mostly clear.

For Wednesday the 25th, partly cloudy and windy weather is expected, with moderate southerly winds. The high will be 15°C and the low 2°C.

As for rainfall, a dry outlook is anticipated: the north of the province will have a virtually rainless season, while from the center to the south, including San Rafael and Malargüe, values ​​will be 40% to 50% below the usual average.

Winter 2025 officially began in Argentina at 11:42 p.m. on Friday, June 20, with the solstice, which marks the beginning of the coldest season and the time with the fewest hours of sunlight. This astronomical phenomenon is caused by the tilt of the Earth's axis and the Earth's orbit around the Sun, which means that the Southern Hemisphere receives less solar radiation during this time.

For Mendoza, the National Meteorological Service predicts a winter with slightly above-normal temperatures in much of the country, except in the central region.