Rosario Weather in May
During May, Rosario experiences pleasant daytime temperatures of 21°C (70°F) and cooler nights around 10°C (50°F). Expect quite a bit of rainfall. Around 70 mm (2.8 in) is typical.
Rainfall in Rosario in May
Historically, May sees about 6 days of rain, with a monthly average of 70 mm (2.8 in). Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.
Temperature in Rosario in May
If you're visiting Rosario in May, expect perfect temperatures with highs of 21°C (70°F) and overnight lows of 10°C (50°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 10°C (50°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.
Sunshine in Rosario in May
With about 168 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.
Wind Speed in Rosario in May
May has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, August and September 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 Argentina, check out our Rosario's climate page.
Rosario Temperature in May
Min Temperature
10°C (50°F)
Max Temperature
21°C (70°F)
Chance of Rain
20%
Precipitation
70 mm (2.8 in)
Rainy days
6 days
Humidity
82%
Windspeed
3 m/s (6 knots)
Sunshine
168 hours
Percentage Sunshine
57%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Rosario typically drop from around 21°C (70°F) at the start of May to approximately 18°C (64°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 11°C (52°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Rosario in May
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 May
According to our 50 years of weather records for Rosario, the following extremes were recorded between 1976 and 2026.
- On May 21, 2009, temperatures climbed to 31°C (88°F), marking the warmest May day on record.
- Rosario experienced its chilliest May day on May 4, 1989, reaching only 9°C (48°F).
- Nighttime temperatures dropped to -5°C (23°F) on May 30, 2008, marking the coldest May night on record.
Best Places in Argentina in May
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Rosario in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Rosario in May
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 Argentina, check out our Rosario's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Rosario climate overview or explore weather in Argentina.
