Climate averages 1991–2020
Bahía Blanca weather
in May.
A mild, fairly dry month: the 9th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Bahía Blanca: daytime highs average 16.7°C and nights cool to about 9.2°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 38 mm of rain on roughly 5 days, which makes May a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 03 min on an average May day.
The nearest other city in this atlas is Olavarría (265 km away). In May its highs average 16.0°C, 0.7°C cooler than Bahía Blanca, with 47 mm of rain.
Among the 67 cities listed in Argentina, Bahía Blanca ranks 54th of 67 for the warmest May highs and 20th of 67 for the driest May (rainfall, lowest first). The mean May high of those 67 cities is 18.0°C; Bahía Blanca is 1.3°C cooler than that mean.
From May to June, average highs fall by 3.3°C to 13.4°C, and monthly rainfall falls from 38 mm to 28 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Bahía Blanca climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.7°C18.7°C | 18.7°C | 54 | 7.1 | 14.515 h |
| February | 28.0°C17.7°C | 17.7°C | 65 | 6.7 | 13.614 h |
| March | 25.3°C16.0°C | 16.0°C | 67 | 6.7 | 12.412 h |
| April | 20.7°C12.2°C | 12.2°C | 55 | 6.0 | 11.111 h |
| May, selected | 16.7°C9.2°C | 9.2°C | 38 | 5.4 | 10.110 h |
| June | 13.4°C6.2°C | 6.2°C | 28 | 4.4 | 9.510 h |
| July | 12.7°C5.0°C | 5.0°C | 34 | 5.0 | 9.710 h |
| August | 15.1°C6.4°C | 6.4°C | 35 | 4.7 | 10.611 h |
| September | 17.6°C8.0°C | 8.0°C | 45 | 6.2 | 11.812 h |
| October | 20.6°C10.9°C | 10.9°C | 64 | 7.7 | 13.113 h |
| November | 24.5°C14.0°C | 14.0°C | 63 | 7.0 | 14.214 h |
| December | 28.0°C16.9°C | 16.9°C | 57 | 6.2 | 14.815 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Olavarría in MayArgentina · 265 kmHigh 16.0°C · Low 7.7°C · 47 mm rain
- Santa Rosa, Argentina in MayArgentina · 294 kmHigh 17.0°C · Low 8.6°C · 30 mm rain
- Necochea in MayArgentina · 307 kmHigh 15.6°C · Low 10.5°C · 53 mm rain
- Tandil in MayArgentina · 315 kmHigh 15.5°C · Low 7.4°C · 42 mm rain
- Mar del Plata in MayArgentina · 418 kmHigh 15.7°C · Low 9.9°C · 49 mm rain
- General Roca in MayArgentina · 462 kmHigh 16.3°C · Low 7.1°C · 27 mm rain
- Junín in MayArgentina · 473 kmHigh 18.1°C · Low 9.8°C · 62 mm rain
- Cipolletti in MayArgentina · 496 kmHigh 16.2°C · Low 6.8°C · 26 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Bahía Blanca) is explained once on the Bahía Blanca year overview and on the Sources, method and limits page.