Rosario Weather in September
In September, Rosario averages a high of 22°C (72°F) and a low of 9°C (48°F), based on 53 years of historical weather data from ROSARIO.
22°C
Average high
72°F
9°C
Average low
48°F
37°C
Record high
99°F · 2013
-7°C
Record low
19°F · 1974
What to Expect in Rosario in September
Typical September days in Rosario reach 22°C (72°F) during the afternoon and cool to around 9°C (48°F) overnight. On average, measurable rain falls on about 27% of days this month. Over the past 53 years, September temperatures in Rosario have ranged from a record high of 37°C (2013) down to a record low of -7°C (1974).
For a day-by-day look or other months, see the full Rosario weather history.