Climate averages 1991–2020
Rosario weather
in July.
A mild, fairly dry month: the coolest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Rosario: daytime highs average 15.4°C and nights cool to about 6.9°C. By daytime temperature it is the coolest month of the year.
Expect about 36 mm of rain on roughly 5 days, which makes July a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 12 min on an average July day.
The nearest other city in this atlas is Gobernador Gálvez (9 km away). In July its highs average 15.3°C, about as warm as Rosario, with 36 mm of rain.
Among the 67 cities listed in Argentina, Rosario ranks joint 20th of 67 for the warmest July highs and joint 26th of 67 for the driest July (rainfall, lowest first). The mean July high of those 67 cities is 14.6°C; Rosario is 0.8°C warmer than that mean.
From July to August, average highs rise by 2.8°C to 18.1°C, and monthly rainfall rises from 36 mm to 53 mm.
The annual picture
July 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, selected | 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 | 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
July in nearby cities
- Gobernador Gálvez in JulyArgentina · 9 kmHigh 15.3°C · Low 7.1°C · 36 mm rain
- San Nicolás de los Arroyos in JulyArgentina · 59 kmHigh 15.1°C · Low 7.4°C · 42 mm rain
- Pergamino in JulyArgentina · 105 kmHigh 14.7°C · Low 6.1°C · 37 mm rain
- Paraná in JulyArgentina · 135 kmHigh 15.9°C · Low 8.0°C · 39 mm rain
- Santa Fe in JulyArgentina · 144 kmHigh 16.4°C · Low 8.2°C · 37 mm rain
- Venado Tuerto in JulyArgentina · 152 kmHigh 14.9°C · Low 5.9°C · 25 mm rain
- Junín in JulyArgentina · 185 kmHigh 14.3°C · Low 5.6°C · 32 mm rain
- Zárate in JulyArgentina · 197 kmHigh 14.6°C · Low 6.1°C · 59 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.