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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 89°F, while the coldest is July averaging around 40°F at night. Precipitation totals about 42 inches a year and is strongly seasonal — March alone averages 5.7 inches while June barely receives 0.85 inches.
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 (°F) | 89 | 86 | 83 | 77 | 70 | 64 | 63 | 68 | 72 | 77 | 83 | 87 |
| Avg temp (°F) | 77 | 75 | 72 | 65 | 59 | 53 | 52 | 55 | 60 | 66 | 71 | 75 |
| Avg low (°F) | 66 | 64 | 61 | 54 | 48 | 42 | 40 | 42 | 47 | 54 | 59 | 63 |
| Precipitation (in) | 4.8 | 4.7 | 5.7 | 4.9 | 2.6 | 0.8 | 0.9 | 1.7 | 1.9 | 4.6 | 4.2 | 5.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 86 | 83 | 77 | 70 | 64 |
| Avg temp (°F) | 77 | 75 | 72 | 65 | 59 | 53 |
| Avg low (°F) | 66 | 64 | 61 | 54 | 48 | 42 |
| Precipitation (in) | 4.8 | 4.7 | 5.7 | 4.9 | 2.6 | 0.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 63 | 68 | 72 | 77 | 83 | 87 |
| Avg temp (°F) | 52 | 55 | 60 | 66 | 71 | 75 |
| Avg low (°F) | 40 | 42 | 47 | 54 | 59 | 63 |
| Precipitation (in) | 0.9 | 1.7 | 1.9 | 4.6 | 4.2 | 5.2 |
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.