Rosario Temperature by Month
Rosario, Santa Fe Province, Argentina has an average annual maximum temperature of 25°C (77°F), ranging from 17°C (63°F) in July to 31°C (88°F) in January. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Rosario Monthly Temperatures
The climate in Rosario is dynamic, ranging widely from moderate in winter to very warm in summer. Nights are significantly colder, with lows dropping from 19°C (66°F) in January to 6°C (43°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Rosario 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 294 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Rosario Temperatures: 1976-2026
Browse day-by-day temperature records for Rosario spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Rosario vs Argentina
The map below shows the annual temperature across Argentina. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Rosario vs World: Temperature Compared
Rosario'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:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in Rosario?
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 Rosario, July is the coolest month, with average highs of 17°C (63°F) and humidity around 82% — considered very high. In January, the warmest month, temperatures average 31°C (88°F) with 69% 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.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Rosario's weather — including monthly rainfall, sunshine hours, and humidity — visit our Rosario climate page.
