Santa Rosa climate
Santa Rosa (Argentina) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 16 °C61 °F, and about 743 mm29 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Santa Rosa climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 3392 | 1762 | 2577 | 863.4 | 0 |
| Feb | 3189 | 1560 | 2374 | 863.4 | 0 |
| Mar | 2882 | 1355 | 2068 | 1034.1 | 0 |
| Apr | 2272 | 948 | 1660 | 672.6 | 0 |
| May | 1762 | 542 | 1152 | 261.0 | 1 |
| Jun | 1457 | 235 | 846 | 130.5 | 5 |
| Jul | 1356 | 134 | 745 | 190.8 | 8 |
| Aug | 1661 | 337 | 949 | 230.9 | 5 |
| Sep | 2068 | 541 | 1355 | 692.7 | 1 |
| Oct | 2474 | 947 | 1661 | 973.8 | 0 |
| Nov | 2883 | 1254 | 2068 | 732.9 | 0 |
| Dec | 3289 | 1559 | 2374 | 803.2 | 0 |
| Year | 3392 | 134 | 1661 | 74329 | 22 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 47% | 42% | 7.8 | 14:24 |
| Feb | 52% | 41% | 6.8 | 13:30 |
| Mar | 60% | 40% | 5.3 | 12:25 |
| Apr | 66% | 45% | 3.8 | 11:12 |
| May | 75% | 58% | 2.6 | 10:12 |
| Jun | 74% | 56% | 2.2 | 9:40 |
| Jul | 72% | 58% | 2.4 | 9:53 |
| Aug | 65% | 53% | 3.3 | 10:45 |
| Sep | 59% | 53% | 4.5 | 11:55 |
| Oct | 59% | 53% | 5.7 | 13:06 |
| Nov | 52% | 45% | 7.3 | 14:09 |
| Dec | 46% | 42% | 8.0 | 14:39 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Santa Rosa is like
The warmest month is January, with an average high of 33 °C92 °F and a low of 17 °C62 °F. The coldest is July, when highs average 13 °C56 °F and lows 1 °C34 °F. There is a clear seasonal cycle, with 17.8 °C32 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 743 mm29 in. The wettest three-month stretch is January–March, which brings 37% of the annual total. Months with less than 20 mm0.8 in on average: June and July. The wettest month is March (103 mm4.1 in), the driest is June (13 mm0.5 in).
Relative humidity ranges from 46% in December to 75% in May. The clearest skies (lowest average cloud amount, 40%) are typical of March. Average wind speed near the ground ranges from 1 km/h (1 mph) in January to 2 km/h (1 mph) in August. Daylight lasts from about 9.7 hours in June to 14.7 hours in December.
Best time to visit Santa Rosa
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and September–November: average highs of 20 °C68 °F to 28 °C83 °F with 67 mm2.6 in to 97 mm3.8 in of precipitation per month.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Santa Rosa
- Summer (December–February) — highs 3189 to 33 °C92 °F, lows 1559 to 17 °C62 °F, about 84 mm3.3 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an extra layer for the cooler mornings and evenings.
- Autumn (March–May) — highs 1762 to 28 °C82 °F, lows 542 to 13 °C55 °F, about 65 mm2.6 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Winter (June–August) — highs 1356 to 16 °C61 °F, lows 134 to 3 °C37 °F, about 18 mm0.7 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (September–November) — highs 2068 to 28 °C83 °F, lows 541 to 12 °C54 °F, about 80 mm3.1 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
How Santa Rosa compares
Compared with Bahía Blanca, about 294 km to the southeast, Santa Rosa has practically the same average temperature and receives 15% more precipitation (743 mm29 in vs 647 mm25 in). The difference is largest in October (0.7 °C1.2 °F warmer).
Of the 31 places in Argentina covered by World Climates, Santa Rosa is the 26th warmest by annual mean temperature and the 21st wettest by annual precipitation. See all of them on the Argentina climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Zunyi (China, Cfa), Guiyang (China, Cwa) and Queenstown (South Africa, Cfb).
Nearby places
- Bahía Blanca 294 km · 16 °C60 °F · 647 mm25 in
- Río Cuarto 388 km · 17 °C62 °F · 811 mm32 in
- San Luis 414 km · 17 °C62 °F · 694 mm27 in
- Neuquén 421 km · 15 °C59 °F · 249 mm9.8 in
- San Rafael 428 km · 17 °C62 °F · 410 mm16 in
- Tandil 465 km · 14 °C57 °F · 907 mm36 in
- San Nicolás de los Arroyos 521 km · 17 °C63 °F · 1,178 mm46 in
- Rosario 527 km · 18 °C64 °F · 1,091 mm43 in
Frequently asked questions
What is the warmest month in Santa Rosa?
January is the warmest month in Santa Rosa, with an average high of 33 °C (92 °F) and an average low of 17 °C (62 °F).
What is the coldest month in Santa Rosa?
July is the coldest month, with an average high of 13 °C (56 °F) and an average low of 1 °C (34 °F).
When does it rain the most in Santa Rosa?
March is the wettest month with about 103 mm (4.1 in) of precipitation; June is the driest with about 13 mm (0.5 in).
What is the best time to visit Santa Rosa?
Judging by long-term averages, the most comfortable months are April and September–November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.