Climate averages 1991–2020
Rosario weather
in October.
A warm, wet month: the 6th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in Rosario: daytime highs average 23.2°C and nights cool to about 13.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 111 mm of rain on roughly 10 days, which makes October a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 53 min on an average October day.
The nearest other city in this atlas is Gobernador Gálvez (9 km away). In October its highs average 23.1°C, about as warm as Rosario, with 111 mm of rain.
Among the 67 cities listed in Argentina, Rosario ranks 23rd of 67 for the warmest October highs and joint 37th of 67 for the driest October (rainfall, lowest first). The mean October high of those 67 cities is 22.2°C; Rosario is 0.9°C warmer than that mean.
From October to November, average highs rise by 3.1°C to 26.3°C, and monthly rainfall rises from 111 mm to 115 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rosario climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.0°C20.1°C | 20.1°C | 102 | 8.1 | 14.114 h |
| February | 28.4°C19.3°C | 19.3°C | 113 | 8.5 | 13.313 h |
| March | 26.6°C17.5°C | 17.5°C | 126 | 7.6 | 12.312 h |
| April | 22.7°C14.1°C | 14.1°C | 103 | 7.9 | 11.311 h |
| May | 18.8°C11.1°C | 11.1°C | 66 | 6.0 | 10.510 h |
| June | 16.0°C8.1°C | 8.1°C | 40 | 4.6 | 10.010 h |
| July | 15.4°C6.9°C | 6.9°C | 36 | 5.0 | 10.210 h |
| August | 18.1°C8.1°C | 8.1°C | 53 | 4.6 | 10.911 h |
| September | 20.4°C10.1°C | 10.1°C | 61 | 5.8 | 11.912 h |
| October, selected | 23.2°C13.1°C | 13.1°C | 111 | 9.7 | 12.913 h |
| November | 26.3°C15.8°C | 15.8°C | 115 | 8.3 | 13.814 h |
| December | 28.8°C18.5°C | 18.5°C | 104 | 8.6 | 14.314 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Gobernador Gálvez in OctoberArgentina · 9 kmHigh 23.1°C · Low 13.3°C · 111 mm rain
- San Nicolás de los Arroyos in OctoberArgentina · 59 kmHigh 22.7°C · Low 13.3°C · 112 mm rain
- Pergamino in OctoberArgentina · 105 kmHigh 22.4°C · Low 12.2°C · 125 mm rain
- Paraná in OctoberArgentina · 135 kmHigh 23.6°C · Low 14.0°C · 122 mm rain
- Santa Fe in OctoberArgentina · 144 kmHigh 24.1°C · Low 14.4°C · 132 mm rain
- Venado Tuerto in OctoberArgentina · 152 kmHigh 22.8°C · Low 12.6°C · 111 mm rain
- Junín in OctoberArgentina · 185 kmHigh 21.9°C · Low 11.8°C · 119 mm rain
- Zárate in OctoberArgentina · 197 kmHigh 21.8°C · Low 12.1°C · 131 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rosario) is explained once on the Rosario year overview and on the Sources, method and limits page.
Gobernador Gálvez lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.