Rosario weather by month

The best time to visit Rosario is September to November — 91/100 in September, 23°C and 5 rainy days. The best season is spring, September to November (89/100 on average).

The worst month is January at 75/100 — sweltering, rainy, clean air. See January →

Updated September 2026 · climate normals from ERA5 reanalysis

Planning the wider trip? Best time to visit Argentina →

Rosario🇦🇷 Argentina · Pampas & Uruguay · City91
  1. 75Jan
  2. 77Feb
  3. 81Mar
  4. 84Apr
  5. 83May
  6. 81Jun
  7. 79Jul
  8. 85Aug
  9. 91Sep
  10. 91Oct
  11. 86Nov
  12. 81Dec

Best season: September to November (89/100 on average) · worst January (75/100)

Days
23°C
Nights
9°C
Wet days
5
Sun
9.5 h
Humidity
65%
Daylight
12 h
Rosario, Argentina
Photo: Franco Garcia · Pexels

Rosario, month by month

Comfort score out of 100 for the kind of trip Rosario is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.

MonthScoreTierHighRainSunCrowdsOn
Jan75B33°C8 d12 hPeak3
Feb77B32°C8 d11 hPeak2
Mar81A29°C8 d10 hPeak3
Apr84A25°C8 d8 hBusy1
May83A20°C6 d7 hShoulder—
Jun81A18°C3 d7 hBusy1
Jul79B18°C5 d7 hBusy1
Aug85A21°C4 d9 hShoulder1
Sep91S23°C5 d10 hBusy1
Oct91S26°C8 d10 hBusy1
Nov86A29°C7 d11 hBusy1
Dec81A31°C8 d12 hPeak2

What's on in Rosario through the year

Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.

January
  • January holidays1–31 JanHoliday
February
  • Carnival long weekend14–17 FebHoliday
March
  • Semana Santa2–5 AprHoliday
June
  • Dia de la Bandera20 JunHoliday
July
  • Smoke off the delta15 Jul – 31 Oct (usually)Hazard
November
  • River season on the Parana15 Nov – 15 Mar (usually)Season
December
  • Christmas and New Year24 Dec – 1 JanHoliday

Crowds in Rosario in September

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Busyschool holidays in 2 of the markets that fill it, one of its best months for weather(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Traveller notes on Rosario

What people who have been say about the place — the year-round notes first, then month by month.

Forum posters specifically recommend March or April for visiting Rosario, describing the weather then as noticeably more comfortable than the hotter January-February stretch. Posters more broadly rate March and April as beautiful months for travel across Argentina generally, with April weather described as delightful. Posters consistently describe Rosario itself as a kind of mini Buenos Aires - chic, attractive, and centered on a scenic riverfront rambla worth strolling for its parks, river views and upscale apartment buildings. Posters generally rate two to three days as enough time to enjoy the city, with April's milder temperatures adding real appeal to that recommendation.
Tripadvisor community · April · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe October as squarely inside Argentina's pleasant spring stretch - sunny, not too hot and not too wet, with the city's parks and gardens in full bloom. One recurring regional comparison posters make: Rosario runs noticeably more humid than nearby Cordoba, which is comparatively dry, though both cities get genuinely hot come summer. Posters recommend budgeting two to three days for Rosario itself, and specifically flag March/April and, by extension, the similarly mild October window as better timing than the peak-summer months of January/February when the heat becomes properly oppressive along the Parana riverfront.
Tripadvisor community · October · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Rosario's card on the map.