Climate averages 1991–2020
General Roca weather
in December.
A hot, fairly dry month: the 2nd warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in General Roca: daytime highs average 30.2°C and nights cool to about 17.0°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 16 mm of rain on roughly 3 days, which makes December a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 51 min on an average December day.
The nearest other city in this atlas is Cipolletti (37 km away). In December its highs average 30.1°C, about as warm as General Roca, with 14 mm of rain.
Among the 67 cities listed in Argentina, General Roca ranks 11th of 67 for the warmest December highs and 4th of 67 for the driest December (rainfall, lowest first). The mean December high of those 67 cities is 27.9°C; General Roca is 2.3°C warmer than that mean.
From December to January, average highs rise by 1.6°C to 31.8°C, and monthly rainfall rises from 16 mm to 18 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
General Roca climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.8°C18.6°C | 18.6°C | 18 | 3.1 | 14.615 h |
| February | 30.0°C17.4°C | 17.4°C | 22 | 3.0 | 13.614 h |
| March | 26.6°C15.0°C | 15.0°C | 25 | 3.5 | 12.412 h |
| April | 21.2°C10.7°C | 10.7°C | 29 | 3.5 | 11.111 h |
| May | 16.3°C7.1°C | 7.1°C | 27 | 4.9 | 10.010 h |
| June | 12.9°C4.3°C | 4.3°C | 20 | 4.4 | 9.59 h |
| July | 12.3°C3.1°C | 3.1°C | 18 | 3.6 | 9.710 h |
| August | 15.3°C4.6°C | 4.6°C | 14 | 2.9 | 10.611 h |
| September | 18.7°C7.0°C | 7.0°C | 21 | 3.5 | 11.812 h |
| October | 22.4°C10.3°C | 10.3°C | 36 | 4.3 | 13.113 h |
| November | 26.8°C13.9°C | 13.9°C | 22 | 3.2 | 14.214 h |
| December, selected | 30.2°C17.0°C | 17.0°C | 16 | 2.6 | 14.815 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
- Cipolletti in DecemberArgentina · 37 kmHigh 30.1°C · Low 16.7°C · 14 mm rain
- Neuquén in DecemberArgentina · 42 kmHigh 30.0°C · Low 16.5°C · 14 mm rain
- San Carlos de Bariloche in DecemberArgentina · 394 kmHigh 17.2°C · Low 7.1°C · 47 mm rain
- Santa Rosa, Argentina in DecemberArgentina · 395 kmHigh 28.9°C · Low 17.5°C · 85 mm rain
- Villa Mercedes, Chile in DecemberChile · 425 kmHigh 22.5°C · Low 10.3°C · 52 mm rain
- Padre Las Casas in DecemberChile · 435 kmHigh 20.7°C · Low 9.3°C · 59 mm rain
- Temuco in DecemberChile · 435 kmHigh 21.2°C · Low 9.6°C · 59 mm rain
- Los Ángeles in DecemberChile · 451 kmHigh 24.2°C · Low 11.2°C · 30 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 General Roca) is explained once on the General Roca year overview and on the Sources, method and limits page.