Climate averages 1991–2020
San Nicolás de los Arroyos weather
in January.
A hot, 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 San Nicolás de los Arroyos: daytime highs average 29.7°C and nights cool to about 20.3°C. By daytime temperature it is the warmest month of the year.
Expect about 103 mm of rain on roughly 8 days, which makes January a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 05 min on an average January day.
The nearest other city in this atlas is Gobernador Gálvez (52 km away). In January its highs average 29.9°C, about as warm as San Nicolás de los Arroyos, with 102 mm of rain.
Among the 67 cities listed in Argentina, San Nicolás de los Arroyos ranks joint 26th of 67 for the warmest January highs and joint 45th of 67 for the driest January (rainfall, lowest first). The mean January high of those 67 cities is 29.0°C; San Nicolás de los Arroyos is 0.7°C warmer than that mean.
From January to February, average highs fall by 1.5°C to 28.1°C, and monthly rainfall rises from 103 mm to 109 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
San Nicolás de los Arroyos 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°C20.3°C | 20.3°C | 103 | 8.2 | 14.114 h |
| February | 28.1°C19.5°C | 19.5°C | 109 | 8.1 | 13.313 h |
| March | 26.3°C17.8°C | 17.8°C | 117 | 7.4 | 12.312 h |
| April | 22.4°C14.5°C | 14.5°C | 106 | 8.1 | 11.311 h |
| May | 18.7°C11.5°C | 11.5°C | 66 | 6.0 | 10.410 h |
| June | 15.8°C8.7°C | 8.7°C | 44 | 5.2 | 10.010 h |
| July | 15.1°C7.4°C | 7.4°C | 42 | 5.1 | 10.210 h |
| August | 17.8°C8.6°C | 8.6°C | 56 | 5.0 | 10.911 h |
| September | 20.0°C10.4°C | 10.4°C | 67 | 6.3 | 11.912 h |
| October | 22.7°C13.3°C | 13.3°C | 112 | 9.7 | 12.913 h |
| November | 25.9°C16.1°C | 16.1°C | 115 | 7.6 | 13.814 h |
| December | 28.4°C18.6°C | 18.6°C | 108 | 8.6 | 14.314 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
- Gobernador Gálvez in JanuaryArgentina · 52 kmHigh 29.9°C · Low 20.2°C · 102 mm rain
- Rosario in JanuaryArgentina · 59 kmHigh 30.0°C · Low 20.1°C · 102 mm rain
- Pergamino in JanuaryArgentina · 70 kmHigh 29.2°C · Low 19.0°C · 103 mm rain
- Zárate in JanuaryArgentina · 139 kmHigh 29.3°C · Low 19.2°C · 95 mm rain
- Campana in JanuaryArgentina · 148 kmHigh 29.3°C · Low 19.0°C · 93 mm rain
- Junín in JanuaryArgentina · 156 kmHigh 28.9°C · Low 18.6°C · 114 mm rain
- Gualeguaychú in JanuaryArgentina · 162 kmHigh 29.9°C · Low 20.1°C · 110 mm rain
- Venado Tuerto in JanuaryArgentina · 169 kmHigh 29.1°C · Low 19.2°C · 110 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 San Nicolás de los Arroyos) is explained once on the San Nicolás de los Arroyos year overview and on the Sources, method and limits page.