Climate averages 1991–2020
Merlo weather
in April.
A mild, wet month: the 6th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Merlo: daytime highs average 21.8°C and nights cool to about 13.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 91 mm of rain on roughly 8 days, which makes April a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 15 min on an average April day.
The nearest other city in this atlas is Moreno (7 km away). In April its highs average 21.8°C, about as warm as Merlo, with 91 mm of rain.
Among the 67 cities listed in Argentina, Merlo ranks joint 33rd of 67 for the warmest April highs and joint 30th of 67 for the driest April (rainfall, lowest first). The mean April high of those 67 cities is 21.8°C; Merlo is level with that mean.
From April to May, average highs fall by 3.9°C to 18.0°C, and monthly rainfall falls from 91 mm to 62 mm.
The annual picture
April 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 | 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, selected | 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
April in nearby cities
- Moreno in AprilArgentina · 7 kmHigh 21.8°C · Low 13.0°C · 91 mm rain
- Bella Vista in AprilArgentina · 12 kmHigh 21.7°C · Low 13.3°C · 94 mm rain
- Isidro Casanova in AprilArgentina · 13 kmHigh 21.6°C · Low 13.3°C · 91 mm rain
- San Miguel, Argentina in AprilArgentina · 14 kmHigh 21.6°C · Low 13.4°C · 94 mm rain
- Laferrere in AprilArgentina · 16 kmHigh 21.7°C · Low 13.2°C · 91 mm rain
- José C. Paz in AprilArgentina · 17 kmHigh 21.8°C · Low 13.1°C · 94 mm rain
- Don Torcuato in AprilArgentina · 21 kmHigh 21.4°C · Low 13.9°C · 94 mm rain
- Ezeiza in AprilArgentina · 28 kmHigh 21.6°C · Low 13.1°C · 91 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.