Rosario weather in September 2025

The temperatures in Rosario in September are comfortable with low of 10°C and and high up to 21°C.

You can expect about 3 to 8 days of rain in Rosario during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Rosario in September 2025.

If you’re planning to visit Rosario in the near future, we highly recommend that you review the 14 day weather forecast for Rosario before you arrive.

Temperatures

21° / 10°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

10.1

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 22° /12°	2 20° /11°	3 20° /10°	4 20° /9°	5 21° /8°	6 21° /9°
7 21° /9°	8 22° /10°	9 21° /9°	10 24° /9°	11 23° /11°	12 23° /10°	13 22° /8°
14 23° /8°	15 25° /8°	16 27° /11°	17 26° /12°	18 24° /12°	19 25° /12°	20 22° /13°
21 26° /11°	22 25° /12°	23 27° /10°	24 25° /10°	25 24° /10°	26 24° /11°	27 28° /10°
28 27° /11°	29 26° /12°	30 28° /12°

Explore the weather in Rosario in other months

Rosario annual weather

Month	Temperatures	Rainy Days	Dry Days	Rainfall	Weather	More details
January	34° / 20°	5	26	116 mm	Ok	Rosario in January
February	32° / 19°	5	23	139 mm	Good	Rosario in February
March	29° / 16°	4	27	103 mm	Good	Rosario in March
April	25° / 14°	4	26	99 mm	Perfect	Rosario in April
May	20° / 11°	3	28	80 mm	Good	Rosario in May
June	17° / 9°	2	28	41 mm	Good	Rosario in June
July	16° / 8°	3	28	55 mm	Good	Rosario in July
August	19° / 9°	3	28	73 mm	Good	Rosario in August
September	21° / 10°	4	26	93 mm	Good	Rosario in September
October	24° / 12°	5	26	123 mm	Perfect	Rosario in October
November	29° / 16°	5	25	120 mm	Good	Rosario in November
December	33° / 18°	4	27	113 mm	Good	Rosario in December