Climate averages 1991–2020
San Rafael weather
in December.
A hot, moderately wet month: the 2nd warmest and the joint 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in San Rafael: daytime highs average 29.3°C and nights cool to about 16.7°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 53 mm of rain on roughly 9 days, which makes December a moderately wet month (the joint 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 25 min on an average December day.
The nearest other city in this atlas is San Martín (171 km away). In December its highs average 30.9°C, 1.6°C warmer than San Rafael, with 39 mm of rain.
Among the 67 cities listed in Argentina, San Rafael ranks joint 17th of 67 for the warmest December highs and 12th of 67 for the driest December (rainfall, lowest first). The mean December high of those 67 cities is 27.9°C; San Rafael is 1.4°C warmer than that mean.
From December to January, average highs rise by 1.1°C to 30.5°C, and monthly rainfall falls from 53 mm to 45 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
San Rafael climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.5°C18.3°C | 18.3°C | 45 | 8.8 | 14.214 h |
| February | 28.7°C17.0°C | 17.0°C | 48 | 7.2 | 13.413 h |
| March | 25.7°C14.6°C | 14.6°C | 48 | 6.8 | 12.312 h |
| April | 20.9°C10.1°C | 10.1°C | 42 | 6.0 | 11.211 h |
| May | 17.1°C6.5°C | 6.5°C | 31 | 5.0 | 10.310 h |
| June | 14.6°C2.7°C | 2.7°C | 18 | 3.7 | 9.910 h |
| July | 13.8°C1.5°C | 1.5°C | 16 | 3.2 | 10.110 h |
| August | 16.5°C3.2°C | 3.2°C | 22 | 3.4 | 10.811 h |
| September | 19.4°C6.3°C | 6.3°C | 28 | 4.7 | 11.812 h |
| October | 22.7°C10.0°C | 10.0°C | 60 | 7.6 | 12.913 h |
| November | 26.3°C13.7°C | 13.7°C | 53 | 8.0 | 13.914 h |
| December, selected | 29.3°C16.7°C | 16.7°C | 53 | 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
December in nearby cities
- San Martín in DecemberArgentina · 171 kmHigh 30.9°C · Low 18.8°C · 39 mm rain
- Mendoza in DecemberArgentina · 198 kmHigh 27.6°C · Low 16.3°C · 48 mm rain
- Rancagua in DecemberChile · 226 kmHigh 26.2°C · Low 13.8°C · 13 mm rain
- Puente Alto in DecemberChile · 235 kmHigh 25.9°C · Low 13.2°C · 25 mm rain
- San Luis in DecemberArgentina · 237 kmHigh 28.9°C · Low 18.0°C · 101 mm rain
- Paine in DecemberChile · 239 kmHigh 28.1°C · Low 15.1°C · 6.5 mm rain
- Peñalolén in DecemberChile · 240 kmHigh 24.9°C · Low 13.6°C · 25 mm rain
- San Bernardo in DecemberChile · 246 kmHigh 27.2°C · Low 13.9°C · 6.3 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 San Rafael) is explained once on the San Rafael year overview and on the Sources, method and limits page.