Bahía Blanca climate
Bahía Blanca (Argentina) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 16 °C60 °F, and about 647 mm25 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Bahía Blanca climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 3391 | 1763 | 2577 | 622.5 | 0 |
| Feb | 3188 | 1661 | 2474 | 662.6 | 0 |
| Mar | 2781 | 1456 | 2069 | 682.7 | 0 |
| Apr | 2271 | 949 | 1560 | 592.3 | 0 |
| May | 1661 | 643 | 1152 | 381.5 | 1 |
| Jun | 1355 | 337 | 846 | 210.8 | 6 |
| Jul | 1254 | 236 | 745 | 351.4 | 9 |
| Aug | 1559 | 338 | 949 | 321.3 | 5 |
| Sep | 1965 | 542 | 1254 | 502.0 | 2 |
| Oct | 2272 | 947 | 1560 | 873.4 | 0 |
| Nov | 2781 | 1254 | 2067 | 712.8 | 0 |
| Dec | 3188 | 1559 | 2374 | 562.2 | 0 |
| Year | 3391 | 236 | 1660 | 64725 | 21 |
“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 | 44% | 39% | 7.8 | 14:35 |
| Feb | 50% | 39% | 6.7 | 13:36 |
| Mar | 58% | 40% | 5.3 | 12:27 |
| Apr | 65% | 45% | 3.7 | 11:08 |
| May | 74% | 57% | 2.4 | 10:03 |
| Jun | 76% | 55% | 2.0 | 9:28 |
| Jul | 76% | 57% | 2.2 | 9:42 |
| Aug | 70% | 56% | 3.0 | 10:38 |
| Sep | 65% | 54% | 4.3 | 11:54 |
| Oct | 62% | 54% | 5.6 | 13:11 |
| Nov | 53% | 47% | 7.1 | 14:19 |
| Dec | 45% | 42% | 7.9 | 14:52 |
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 Bahía Blanca is like
The warmest month is January, with an average high of 33 °C91 °F and a low of 17 °C63 °F. The coldest is July, when highs average 12 °C54 °F and lows 2 °C36 °F. There is a clear seasonal cycle, with 18 °C32.3 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 647 mm25 in. The wettest three-month stretch is October–December, which brings 33% of the annual total. The wettest month is October (87 mm3.4 in), the driest is June (21 mm0.8 in).
Relative humidity ranges from 44% in January to 76% in July. The clearest skies (lowest average cloud amount, 39%) are typical of February. Average wind speed near the ground ranges from 11 km/h (7 mph) in May to 14 km/h (9 mph) in January. Daylight lasts from about 9.5 hours in June to 14.9 hours in December.
Best time to visit Bahía Blanca
Based on these averages, the most comfortable months for sightseeing and outdoor activities are March and April and September–November: average highs of 19 °C65 °F to 27 °C81 °F with 50 mm2.0 in to 87 mm3.4 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 Bahía Blanca
- Summer (December–February) — highs 3188 to 33 °C91 °F, lows 1559 to 17 °C63 °F, about 61 mm2.4 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 1661 to 27 °C81 °F, lows 643 to 14 °C56 °F, about 55 mm2.2 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 1254 to 15 °C59 °F, lows 236 to 3 °C38 °F, about 29 mm1.2 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 1965 to 27 °C81 °F, lows 542 to 12 °C54 °F, about 70 mm2.7 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 Bahía Blanca compares
Of the 31 places in Argentina covered by World Climates, Bahía Blanca is the 27th warmest by annual mean temperature and the 24th 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): Wagga Wagga (Australia, Cfa), Girona (Spain, Cfa) and Lleida (Spain, BSk).
Nearby places
- Santa Rosa 294 km · 16 °C61 °F · 743 mm29 in
- Tandil 315 km · 14 °C57 °F · 907 mm36 in
- Mar del Plata 418 km · 14 °C58 °F · 1,159 mm46 in
- Neuquén 502 km · 15 °C59 °F · 249 mm9.8 in
- Laferrere 550 km · 16 °C62 °F · 1,069 mm42 in
- Merlo 550 km · 17 °C62 °F · 1,108 mm44 in
- Berazategui 569 km · 17 °C62 °F · 1,072 mm42 in
- La Plata 570 km · 17 °C62 °F · 1,072 mm42 in
Frequently asked questions
What is the warmest month in Bahía Blanca?
January is the warmest month in Bahía Blanca, with an average high of 33 °C (91 °F) and an average low of 17 °C (63 °F).
What is the coldest month in Bahía Blanca?
July is the coldest month, with an average high of 12 °C (54 °F) and an average low of 2 °C (36 °F).
When does it rain the most in Bahía Blanca?
October is the wettest month with about 87 mm (3.4 in) of precipitation; June is the driest with about 21 mm (0.8 in).
What is the best time to visit Bahía Blanca?
Judging by long-term averages, the most comfortable months are March and 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.
The grid cell’s average elevation is 118 m, while Bahía Blanca lies at about 20 m. Temperatures on this page were therefore adjusted by +0.6 °C1.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.