Rosario Temperature by Month
Rosario in Colonia, Uruguay sees significant seasonal temperature differences, with daytime highs between 16°C (61°F) in July and 30°C (86°F) in January, averaging 23°C (73°F) annually. Explore the full monthly breakdown below.
Rosario Monthly Temperatures
Visitors to Rosario will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures 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 Rosario by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
49-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 Uruguay
The map below shows the annual temperature across Uruguay. 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 23°C (73°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.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
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 Rosario's weather — including monthly rainfall, sunshine hours, and humidity — visit our Rosario climate page.
