Rosario Weather in January
January in Rosario averages 30°C (86°F) during the day and 19°C (66°F) at night. Quite a bit of rainfall is typical this month, with around 87 mm (3.4 in) on average. An umbrella is a good idea.
Rainfall in Rosario in January
The climate data from previous years indicates about 10 days of rain, averaging 87 mm (3.4 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Rosario in January
Daytime highs in Rosario in January reach 30°C (86°F), with nights around 19°C (66°F). Mornings and evenings are often more comfortable than the peak afternoon hours. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. Average temperatures can be deceiving; some days will be hotter. Wear breathable fabrics and drink plenty of water to stay cool.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, September and December typically offer the best weather for Rosario.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Uruguay, check out our Rosario's climate page.
Rosario Temperature in January
Min Temperature
19°C (66°F)
Max Temperature
30°C (86°F)
Chance of Rain
32%
Precipitation
87 mm (3.4 in)
Rainy days
10 days
Daily Historical Temperatures
50-year average (1977-2026)
Based on our historical records, temperatures in Rosario typically stay consistent throughout January, with daily highs averaging around 30°C (86°F). Nights are pleasant, with lows typically ranging from 18°C (64°F) to 20°C (68°F).
Average temperatures in January
Daily Historical Precipitation
50-year average (1977-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Rosario in January
Browse day-by-day weather records for Rosario spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Rosario historical weather extremes in January
Based on 46 years of weather observations (1979-2025), these are the most extreme conditions recorded in Rosario.
- On January 14, 2022, temperatures climbed to 40°C (104°F), marking the warmest January day on record.
- On January 31, 2005, Rosario saw its coldest January day with temperatures maxing out at 17°C (63°F).
- Nighttime temperatures dropped to 11°C (52°F) on January 31, 2020, marking the coldest January night on record.
Best Places in Uruguay in January
Find out more about the weather in Uruguay and which places have the best travel conditions in this month. See all of Uruguay in January →
perfect weather
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tolerable
unpleasant
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What to Wear in Rosario in January
Warm but pleasant conditions in Rosario in January. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags.What To Do in Rosario in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Uruguay, check out our Rosario's climate page.
See the full Rosario climate overview or explore weather in Uruguay.
