Rosario weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Rosario in September. Check more long-term weather averages for Rosario in September before you book your next holiday to Argentina in 2025/2026.

  • 21°C maximum daytime temperature in September in Rosario21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in September in Rosario6
    6 days with some rainfall
  • 8°C minimum night-time temperature in September in Rosario8
    8°C min night temperature
  • 12 hours of daylight per day in September in Rosario12
    12 hours of daylight per day
  • No heat & humidity in September in Rosario0
    No heat & humidity
  • 52 mm monthly rainfall in September in Rosario52
    52 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Rosario6
    6 (High) UV index

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The September weather guide for Argentina (Rosario) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Argentina

How hot is it in Rosario in September?

Daytime temperatures usually reach 21°C in Rosario in September, falling to 8°C at night.

How sunny is it in Rosario in September?

There are normally 7 hours of bright sunshine each day in Rosario in September - that's 57% of daylight hours.

Does it rain in Rosario in September?

There are usually 6 days with some rain in Rosario in September and the average monthly rainfall is 52mm.

Rosario September sunrise & sunset times

Browse the sunrise and sunset times for Rosario in September 2025. Select a month to view Rosario sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 07:20 18:46
Monday, 15th September 2025 07:01 18:55
Tuesday, 30th September 2025 06:41 19:05

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