Climate averages 1991–2020
Santa Rosa, Argentina weather
in January.
A hot, moderately wet month: the warmest and the joint 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Santa Rosa, Argentina: daytime highs average 30.1°C and nights cool to about 19.0°C. By daytime temperature it is the warmest month of the year.
Expect about 82 mm of rain on roughly 9 days, which makes January a moderately wet month (the joint 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 21 min on an average January day.
The nearest other city in this atlas is Bahía Blanca (294 km away). In January its highs average 29.7°C, about as warm as Santa Rosa, Argentina, with 54 mm of rain.
Among the 67 cities listed in Argentina, Santa Rosa, Argentina ranks joint 20th of 67 for the warmest January highs and 19th of 67 for the driest January (rainfall, lowest first). The mean January high of those 67 cities is 29.0°C; Santa Rosa, Argentina is 1.1°C warmer than that mean.
From January to February, average highs fall by 1.8°C to 28.3°C, and monthly rainfall falls from 82 mm to 81 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
Santa Rosa, Argentina climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 30.1°C19.0°C | 19.0°C | 82 | 9.0 | 14.314 h |
| February | 28.3°C17.7°C | 17.7°C | 81 | 7.9 | 13.513 h |
| March | 25.6°C15.8°C | 15.8°C | 86 | 8.0 | 12.312 h |
| April | 21.0°C11.8°C | 11.8°C | 67 | 6.3 | 11.211 h |
| May | 17.0°C8.6°C | 8.6°C | 30 | 5.0 | 10.210 h |
| June | 13.9°C5.1°C | 5.1°C | 16 | 3.3 | 9.710 h |
| July | 13.3°C4.1°C | 4.1°C | 19 | 3.7 | 9.910 h |
| August | 16.2°C5.7°C | 5.7°C | 27 | 4.0 | 10.711 h |
| September | 18.9°C8.0°C | 8.0°C | 48 | 5.8 | 11.812 h |
| October | 21.9°C11.2°C | 11.2°C | 82 | 9.6 | 13.013 h |
| November | 25.7°C14.5°C | 14.5°C | 74 | 8.0 | 14.014 h |
| December | 28.9°C17.5°C | 17.5°C | 85 | 8.5 | 14.615 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
- Bahía Blanca in JanuaryArgentina · 294 kmHigh 29.7°C · Low 18.7°C · 54 mm rain
- Villa Mercedes, Argentina in JanuaryArgentina · 344 kmHigh 29.7°C · Low 18.9°C · 86 mm rain
- Olavarría in JanuaryArgentina · 355 kmHigh 27.9°C · Low 16.4°C · 92 mm rain
- Junín in JanuaryArgentina · 377 kmHigh 28.9°C · Low 18.6°C · 114 mm rain
- Venado Tuerto in JanuaryArgentina · 383 kmHigh 29.1°C · Low 19.2°C · 110 mm rain
- Río Cuarto in JanuaryArgentina · 388 kmHigh 28.8°C · Low 19.0°C · 96 mm rain
- General Roca in JanuaryArgentina · 395 kmHigh 31.8°C · Low 18.6°C · 18 mm rain
- San Luis in JanuaryArgentina · 414 kmHigh 29.7°C · Low 19.2°C · 107 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 Santa Rosa) is explained once on the Santa Rosa, Argentina year overview and on the Sources, method and limits page.