Climate averages 1991–2020
Isidro Casanova weather
in December.
A warm, moderately wet month: the 2nd warmest and the joint 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Isidro Casanova: daytime highs average 27.5°C and nights cool to about 17.5°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 85 mm of rain on roughly 9 days, which makes December a moderately wet month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 26 min on an average December day.
The nearest other city in this atlas is Laferrere (6 km away). In December its highs average 27.6°C, about as warm as Isidro Casanova, with 85 mm of rain.
Among the 67 cities listed in Argentina, Isidro Casanova ranks joint 47th of 67 for the warmest December highs and joint 24th of 67 for the driest December (rainfall, lowest first). The mean December high of those 67 cities is 27.9°C; Isidro Casanova is 0.4°C cooler than that mean.
From December to January, average highs rise by 1.3°C to 28.8°C, and monthly rainfall rises from 85 mm to 87 mm.
The annual picture
December 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
Isidro Casanova climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.8°C19.3°C | 19.3°C | 87 | 7.4 | 14.214 h |
| February | 27.4°C18.6°C | 18.6°C | 93 | 8.2 | 13.413 h |
| March | 25.4°C16.9°C | 16.9°C | 85 | 7.4 | 12.312 h |
| April | 21.6°C13.3°C | 13.3°C | 91 | 7.9 | 11.211 h |
| May | 17.8°C10.2°C | 10.2°C | 61 | 6.0 | 10.310 h |
| June | 14.8°C7.3°C | 7.3°C | 60 | 5.9 | 9.910 h |
| July | 13.9°C6.2°C | 6.2°C | 60 | 6.1 | 10.110 h |
| August | 16.4°C7.6°C | 7.6°C | 62 | 5.8 | 10.811 h |
| September | 18.2°C9.2°C | 9.2°C | 72 | 6.7 | 11.812 h |
| October | 21.0°C12.1°C | 12.1°C | 109 | 9.1 | 12.913 h |
| November | 24.4°C14.8°C | 14.8°C | 93 | 8.4 | 13.914 h |
| December, selected | 27.5°C17.5°C | 17.5°C | 85 | 8.5 | 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
December in nearby cities
- Laferrere in DecemberArgentina · 6 kmHigh 27.6°C · Low 17.4°C · 85 mm rain
- Merlo in DecemberArgentina · 13 kmHigh 27.9°C · Low 17.4°C · 87 mm rain
- Bella Vista in DecemberArgentina · 18 kmHigh 27.7°C · Low 17.5°C · 92 mm rain
- Lomas de Zamora in DecemberArgentina · 18 kmHigh 26.9°C · Low 17.9°C · 85 mm rain
- Ezeiza in DecemberArgentina · 18 kmHigh 27.5°C · Low 17.2°C · 85 mm rain
- Moreno in DecemberArgentina · 20 kmHigh 27.8°C · Low 17.2°C · 87 mm rain
- Avellaneda in DecemberArgentina · 21 kmHigh 26.7°C · Low 18.5°C · 81 mm rain
- San Miguel, Argentina in DecemberArgentina · 21 kmHigh 27.4°C · Low 17.5°C · 92 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 Isidro Casanova) is explained once on the Isidro Casanova year overview and on the Sources, method and limits page.
Laferrere, Ezeiza and Lomas de Zamora lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.