Climate averages 1991–2020
Merlo weather
in October.
A mild, wet month: the 7th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Merlo: daytime highs average 21.3°C and nights cool to about 11.9°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 111 mm of rain on roughly 9 days, which makes October a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 56 min on an average October day.
The nearest other city in this atlas is Moreno (7 km away). In October its highs average 21.3°C, about as warm as Merlo, with 111 mm of rain.
Among the 67 cities listed in Argentina, Merlo ranks joint 41st of 67 for the warmest October highs and joint 37th of 67 for the driest October (rainfall, lowest first). The mean October high of those 67 cities is 22.2°C; Merlo is 0.9°C cooler than that mean.
From October to November, average highs rise by 3.4°C to 24.7°C, and monthly rainfall falls from 111 mm to 92 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Moreno in OctoberArgentina · 7 kmHigh 21.3°C · Low 11.8°C · 111 mm rain
- Bella Vista in OctoberArgentina · 12 kmHigh 21.2°C · Low 12.1°C · 117 mm rain
- Isidro Casanova in OctoberArgentina · 13 kmHigh 21.0°C · Low 12.1°C · 109 mm rain
- San Miguel, Argentina in OctoberArgentina · 14 kmHigh 21.0°C · Low 12.2°C · 117 mm rain
- Laferrere in OctoberArgentina · 16 kmHigh 21.1°C · Low 11.9°C · 109 mm rain
- José C. Paz in OctoberArgentina · 17 kmHigh 21.2°C · Low 12.0°C · 117 mm rain
- Don Torcuato in OctoberArgentina · 21 kmHigh 20.8°C · Low 12.6°C · 117 mm rain
- Ezeiza in OctoberArgentina · 28 kmHigh 20.9°C · Low 11.8°C · 109 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.