Climate averages 1991–2020
San Antonio, Chile weather
in December.
A mild, very dry month: the 4th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in San Antonio, Chile: daytime highs average 20.4°C and nights cool to about 13.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 2.9 mm of rain on fewer than one day, which makes December a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 20 min on an average December day.
The nearest other city in this atlas is Valparaíso (62 km away). In December its highs average 19.9°C, 0.6°C cooler than San Antonio, Chile, with 2.8 mm of rain.
Among the 40 cities listed in Chile, San Antonio, Chile ranks 35th of 40 for the warmest December highs and 12th of 40 for the driest December (rainfall, lowest first). The mean December high of those 40 cities is 23.8°C; San Antonio, Chile is 3.4°C cooler than that mean.
From December to January, average highs rise by 1.1°C to 21.6°C, and monthly rainfall falls from 2.9 mm to under 1 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 Antonio, Chile climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.6°C14.5°C | 14.5°C | 0.4 | 0.1 | 14.114 h |
| February | 21.4°C14.4°C | 14.4°C | 1.6 | 0.3 | 13.313 h |
| March | 20.9°C13.4°C | 13.4°C | 3.5 | 0.8 | 12.312 h |
| April | 18.9°C11.3°C | 11.3°C | 18 | 2.1 | 11.311 h |
| May | 16.6°C9.6°C | 9.6°C | 61 | 4.7 | 10.410 h |
| June | 14.7°C8.0°C | 8.0°C | 122 | 7.0 | 10.010 h |
| July | 14.0°C6.9°C | 6.9°C | 67 | 5.6 | 10.110 h |
| August | 14.7°C7.4°C | 7.4°C | 59 | 5.1 | 10.911 h |
| September | 15.8°C8.6°C | 8.6°C | 28 | 3.0 | 11.912 h |
| October | 17.3°C10.0°C | 10.0°C | 14 | 1.8 | 12.913 h |
| November | 19.1°C11.7°C | 11.7°C | 3.5 | 0.7 | 13.814 h |
| December, selected | 20.4°C13.2°C | 13.2°C | 2.9 | 0.4 | 14.314 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
- Valparaíso in DecemberChile · 62 kmHigh 19.9°C · Low 14.9°C · 2.8 mm rain
- Quilpué in DecemberChile · 63 kmHigh 22.8°C · Low 13.5°C · 2.5 mm rain
- Viña del Mar in DecemberChile · 64 kmHigh 22.4°C · Low 14.1°C · 2.5 mm rain
- Peñaflor in DecemberChile · 68 kmHigh 28.0°C · Low 14.0°C · 4.8 mm rain
- Lampa in DecemberChile · 76 kmHigh 28.5°C · Low 15.3°C · 6.0 mm rain
- Maipú in DecemberChile · 79 kmHigh 27.3°C · Low 14.1°C · 6.3 mm rain
- Paine in DecemberChile · 84 kmHigh 28.1°C · Low 15.1°C · 6.5 mm rain
- San Bernardo in DecemberChile · 84 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 Antonio) is explained once on the San Antonio, Chile year overview and on the Sources, method and limits page.