Bahía Blanca weather in March
In March, Bahía Blanca has daytime highs averaging 25 °C, nights around 16 °C, with 6.4 wet days, and a sea temperature of 21 °C. Figures are 1991–2020 climate normals.
- 25.4°C Average high
- 16.1°C Average low
- 6.4days Wet days
- 67mm Rainfall
- 20.5°C Sea temperature
- 12h Daylight
Daily temperatures through March
How March develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 March | 27.1 °C | 17.6 °C | 21 % |
| 11–20 March | 25.2 °C | 16.1 °C | 23 % |
| 21–31 March | 24.1 °C | 14.9 °C | 18 % |
- Average highs fall from 27.1 °C early in March to 24.1 °C by the end of it.
- Rain is most likely over days 11–20 of March (23 % of days) and least likely over days 21–31 (18 %).
What to expect
| Measure | Typical March | Share of the month |
|---|---|---|
| Days above 25 °C | 17 of 31 | 55 % |
| Days above 30 °C | 4.1 of 31 | 13 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 6.4 of 31 | 21 % |
Conditions in March
| Measure | Average |
|---|---|
| Mean temperature | 20 °C |
| Record high (1991–2020) | 36 °C |
| Record low (1991–2020) | 6.5 °C |
| Relative humidity | 61 % |
| Wind speed | 25 km/h |
| Cloud cover | 37 % |
Where Bahía Blanca ranks in March
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in South America in March | 25th of 50 | 88/100 |
March compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 29.9 °C | 56 mm | 33 % |
| February | 28.1 °C | 64 mm | 34 % |
| March | 25.4 °C | 67 mm | 37 % |
| April | 20.7 °C | 56 mm | 45 % |
| May | 16.7 °C | 39 mm | 54 % |
See all twelve months for Bahía Blanca
- March is the 4th warmest month here.
- It is the 12th driest month of the year.
- It ranks 4th for least cloud cover.
- Days last about 12 hours from sunrise to sunset.
- It rains on 6.4 of 31 days — 21 % of the month.
- Nights are about 9.2 °C cooler than the middle of the day.
- The hottest March day on record since 1991 reached 36 °C, 11 °C above the usual daytime high.
- Beach score: 80 / 100 — see how this is calculated.
QuestionsMarch in Bahía Blanca, answered
How warm is Bahía Blanca in March?
Daily highs average 25 °C and nights fall to about 16 °C, a spread of 9.2 °C between afternoon and dawn. That makes March the 4th warmest month of the year here.
Does it rain much in Bahía Blanca in March?
March averages 67 mm of rain, spread over about 6 of the 31 days — 21 % of the month. Cloud cover averages 37 % of the sky.
Is the sea warm enough to swim in March?
The sea averages 21 °C off Bahía Blanca in March. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in March?
Bahía Blanca averages 12 hours between sunrise and sunset in March. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.