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Rosario, Argentina climate
Cfa Humid subtropical
Rosario has a seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is January with an average daily high near 32°C, while the coldest is July averaging around 4°C at night. Precipitation totals about 1067 mm a year and is strongly seasonal — March alone averages 145 mm while June barely receives 22 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Rosario climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 30 | 28 | 25 | 21 | 18 | 17 | 20 | 22 | 25 | 28 | 31 |
| Avg temp (°C) | 25 | 24 | 22 | 19 | 15 | 12 | 11 | 13 | 16 | 19 | 22 | 24 |
| Avg low (°C) | 19 | 18 | 16 | 12 | 9 | 6 | 4 | 6 | 9 | 12 | 15 | 17 |
| Precipitation (mm) | 122 | 119 | 145 | 123 | 67 | 22 | 22 | 43 | 50 | 117 | 107 | 132 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 30 | 28 | 25 | 21 | 18 |
| Avg temp (°C) | 25 | 24 | 22 | 19 | 15 | 12 |
| Avg low (°C) | 19 | 18 | 16 | 12 | 9 | 6 |
| Precipitation (mm) | 122 | 119 | 145 | 123 | 67 | 22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 17 | 20 | 22 | 25 | 28 | 31 |
| Avg temp (°C) | 11 | 13 | 16 | 19 | 22 | 24 |
| Avg low (°C) | 4 | 6 | 9 | 12 | 15 | 17 |
| Precipitation (mm) | 22 | 43 | 50 | 117 | 107 | 132 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 55 | 46 | 50 | 54 | 54 | 53 | 48 | 50 | 54 | 48 | 50 |
| Relative humidity (%) | 60 | 65 | 69 | 75 | 79 | 80 | 78 | 73 | 68 | 67 | 63 | 60 |
| Wind speed (mph) | 4.5 | 4.4 | 4.3 | 4.4 | 4.4 | 4.6 | 4.9 | 5.1 | 5.3 | 5.4 | 5.3 | 4.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 55 | 46 | 50 | 54 | 54 |
| Relative humidity (%) | 60 | 65 | 69 | 75 | 79 | 80 |
| Wind speed (mph) | 4.5 | 4.4 | 4.3 | 4.4 | 4.4 | 4.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 53 | 48 | 50 | 54 | 48 | 50 |
| Relative humidity (%) | 78 | 73 | 68 | 67 | 63 | 60 |
| Wind speed (mph) | 4.9 | 5.1 | 5.3 | 5.4 | 5.3 | 4.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Rosario, a weather station, about 14 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.