Climate averages 1991–2020
Chillán weather
in December.
A warm, fairly dry month: the 3rd warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Chillán: daytime highs average 25.4°C and nights cool to about 11.6°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 22 mm of rain on roughly 2 days, which makes December a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 36 min on an average December day.
The nearest other city in this atlas is Concepción (88 km away). In December its highs average 22.6°C, 2.8°C cooler than Chillán, with 16 mm of rain.
Among the 40 cities listed in Chile, Chillán ranks 16th of 40 for the warmest December highs and joint 29th of 40 for the driest December (rainfall, lowest first). The mean December high of those 40 cities is 23.8°C; Chillán is 1.6°C warmer than that mean.
From December to January, average highs rise by 2.2°C to 27.6°C, and monthly rainfall falls from 22 mm to 9.5 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
Chillán climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.6°C13.3°C | 13.3°C | 9.5 | 1.3 | 14.314 h |
| February | 27.1°C13.1°C | 13.1°C | 24 | 1.8 | 13.513 h |
| March | 24.7°C11.4°C | 11.4°C | 23 | 2.4 | 12.312 h |
| April | 19.8°C8.6°C | 8.6°C | 75 | 5.2 | 11.211 h |
| May | 15.8°C6.5°C | 6.5°C | 193 | 9.7 | 10.210 h |
| June | 13.1°C5.0°C | 5.0°C | 267 | 13.4 | 9.710 h |
| July | 12.7°C3.5°C | 3.5°C | 203 | 11.4 | 9.910 h |
| August | 14.0°C4.2°C | 4.2°C | 168 | 11.4 | 10.711 h |
| September | 16.3°C5.4°C | 5.4°C | 96 | 7.3 | 11.812 h |
| October | 18.7°C7.1°C | 7.1°C | 63 | 6.4 | 13.013 h |
| November | 22.2°C9.3°C | 9.3°C | 28 | 3.3 | 14.014 h |
| December, selected | 25.4°C11.6°C | 11.6°C | 22 | 2.4 | 14.615 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
- Concepción in DecemberChile · 88 kmHigh 22.6°C · Low 12.3°C · 16 mm rain
- Villa Mercedes, Chile in DecemberChile · 89 kmHigh 22.5°C · Low 10.3°C · 52 mm rain
- Chiguayante in DecemberChile · 90 kmHigh 23.0°C · Low 12.4°C · 22 mm rain
- Talcahuano in DecemberChile · 91 kmHigh 20.7°C · Low 12.3°C · 16 mm rain
- San Pedro de la Paz in DecemberChile · 93 kmHigh 21.2°C · Low 12.4°C · 16 mm rain
- Los Ángeles in DecemberChile · 99 kmHigh 24.2°C · Low 11.2°C · 30 mm rain
- Coronel in DecemberChile · 104 kmHigh 22.2°C · Low 12.6°C · 21 mm rain
- Talca in DecemberChile · 138 kmHigh 27.6°C · Low 13.2°C · 13 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 Chillán) is explained once on the Chillán year overview and on the Sources, method and limits page.