Climate averages 1991–2020
Merlo weather
in January.
A hot, moderately wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Merlo: daytime highs average 29.2°C and nights cool to about 19.2°C. By daytime temperature it is the warmest month of the year.
Expect about 88 mm of rain on roughly 8 days, which makes January a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 11 min on an average January day.
The nearest other city in this atlas is Moreno (7 km away). In January its highs average 29.1°C, about as warm as Merlo, with 88 mm of rain.
Among the 67 cities listed in Argentina, Merlo ranks joint 34th of 67 for the warmest January highs and joint 29th of 67 for the driest January (rainfall, lowest first). The mean January high of those 67 cities is 29.0°C; Merlo is 0.2°C warmer than that mean.
From January to February, average highs fall by 1.4°C to 27.8°C, and monthly rainfall rises from 88 mm to 94 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
Merlo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 29.2°C19.2°C | 19.2°C | 88 | 7.7 | 14.214 h |
| February | 27.8°C18.4°C | 18.4°C | 94 | 8.3 | 13.413 h |
| March | 25.7°C16.7°C | 16.7°C | 85 | 7.5 | 12.312 h |
| April | 21.8°C13.1°C | 13.1°C | 91 | 8.1 | 11.211 h |
| May | 18.0°C10.0°C | 10.0°C | 62 | 6.2 | 10.310 h |
| June | 15.0°C7.1°C | 7.1°C | 58 | 5.9 | 9.910 h |
| July | 14.2°C6.0°C | 6.0°C | 57 | 6.0 | 10.110 h |
| August | 16.6°C7.4°C | 7.4°C | 60 | 5.8 | 10.811 h |
| September | 18.5°C9.1°C | 9.1°C | 71 | 6.7 | 11.812 h |
| October | 21.3°C11.9°C | 11.9°C | 111 | 9.2 | 12.913 h |
| November | 24.7°C14.6°C | 14.6°C | 92 | 8.4 | 13.914 h |
| December | 27.9°C17.4°C | 17.4°C | 87 | 8.6 | 14.414 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
- Moreno in JanuaryArgentina · 7 kmHigh 29.1°C · Low 19.0°C · 88 mm rain
- Bella Vista in JanuaryArgentina · 12 kmHigh 29.0°C · Low 19.2°C · 90 mm rain
- Isidro Casanova in JanuaryArgentina · 13 kmHigh 28.8°C · Low 19.3°C · 87 mm rain
- San Miguel, Argentina in JanuaryArgentina · 14 kmHigh 28.7°C · Low 19.3°C · 90 mm rain
- Laferrere in JanuaryArgentina · 16 kmHigh 28.9°C · Low 19.1°C · 87 mm rain
- José C. Paz in JanuaryArgentina · 17 kmHigh 29.0°C · Low 19.1°C · 90 mm rain
- Don Torcuato in JanuaryArgentina · 21 kmHigh 28.4°C · Low 19.7°C · 90 mm rain
- Ezeiza in JanuaryArgentina · 28 kmHigh 28.8°C · Low 19.0°C · 87 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 Merlo) is explained once on the Merlo year overview and on the Sources, method and limits page.
Moreno lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.