Climate averages 1991–2020
Bahía Blanca weather
in January.
A hot, moderately wet month: the warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Bahía Blanca: daytime highs average 29.7°C and nights cool to about 18.7°C. By daytime temperature it is the warmest month of the year.
Expect about 54 mm of rain on roughly 7 days, which makes January a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 32 min on an average January day.
The nearest other city in this atlas is Olavarría (265 km away). In January its highs average 27.9°C, 1.8°C cooler than Bahía Blanca, with 92 mm of rain.
Among the 67 cities listed in Argentina, Bahía Blanca ranks joint 26th of 67 for the warmest January highs and 13th of 67 for the driest January (rainfall, lowest first). The mean January high of those 67 cities is 29.0°C; Bahía Blanca is 0.7°C warmer than that mean.
From January to February, average highs fall by 1.7°C to 28.0°C, and monthly rainfall rises from 54 mm to 65 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Olavarría in JanuaryArgentina · 265 kmHigh 27.9°C · Low 16.4°C · 92 mm rain
- Santa Rosa, Argentina in JanuaryArgentina · 294 kmHigh 30.1°C · Low 19.0°C · 82 mm rain
- Necochea in JanuaryArgentina · 307 kmHigh 24.7°C · Low 16.8°C · 75 mm rain
- Tandil in JanuaryArgentina · 315 kmHigh 27.1°C · Low 15.3°C · 81 mm rain
- Mar del Plata in JanuaryArgentina · 418 kmHigh 25.1°C · Low 16.7°C · 77 mm rain
- General Roca in JanuaryArgentina · 462 kmHigh 31.8°C · Low 18.6°C · 18 mm rain
- Junín in JanuaryArgentina · 473 kmHigh 28.9°C · Low 18.6°C · 114 mm rain
- Cipolletti in JanuaryArgentina · 496 kmHigh 31.8°C · Low 18.4°C · 12 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.