Gualeguaychú Temperature by Month

Gualeguaychú, Entre Ríos, Argentina has an average annual maximum temperature of 25°C (77°F), ranging from 17°C (63°F) in July to 32°C (90°F) in January. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

With significant temperature fluctuations, Gualeguaychú enjoys distinct seasons year-round. Nighttime lows range from 19°C (66°F) in January to 7°C (45°F) in July.

The chart below illustrates the average maximum day and minimum night temperatures in Gualeguaychú by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. January, the city's warmest month, averages 289 hours of sunshine.

The chart below shows the average temperature throughout the year:

Gualeguaychú's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Gualeguaychú, July is the coolest month, with average highs of 17°C (63°F) and humidity around 77%, considered high. In January, the warmest month, temperatures average 32°C (90°F) with 64% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Gualeguaychú's weather, including monthly rainfall, sunshine hours, and humidity, visit our Gualeguaychú climate page.