Santiago weather in December
In December, Santiago has an average high of 32 °C90 °F and an average low of 16 °C62 °F, with about 7 mm0.3 in of precipitation. It is the 3rd warmest month of the year and the driest.
How December compares with other months
Compared with November, December is 2.5 °C4.5 °F warmer on average. Compared with January, December is 1.5 °C2.8 °F cooler on average. Daylight lasts about 14.4 hours around the middle of the month. Average relative humidity is 30% and the average cloud amount 37%.
Is December a good time to visit Santiago?
December is not among the most comfortable months by our comfort score: it is hot (average high 32 °C90 °F). The most comfortable months in Santiago are April–November.
What to wear in December
For Santiago in December, pack very light, breathable clothing, a sun hat and plenty of water and an extra layer for the cooler mornings and evenings.
December in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Santiago | 3290 | 1662 | 70.3 |
| Colina | 3290 | 1763 | 60.3 |
| Rancagua | 3290 | 1762 | 90.3 |
| Viña del Mar | 2985 | 1458 | 30.1 |
| Valparaíso | 1864 | 1457 | 30.1 |
| Curicó | 3289 | 1457 | 100.4 |
| Mendoza | 3290 | 1762 | 301.2 |
| Talca | 3187 | 1152 | 120.5 |
| San Rafael | 3290 | 1661 | 421.7 |
Nearby places that are more than 1 °C1.8 °F cooler: Viña del Mar, Valparaíso, Curicó and Talca.
Other months in Santiago
- January34 °C92 °F / 18 °C65 °F
- February32 °C90 °F / 18 °C64 °F
- March31 °C87 °F / 16 °C61 °F
- April27 °C80 °F / 13 °C56 °F
- May23 °C73 °F / 10 °C50 °F
- June19 °C66 °F / 7 °C45 °F
- July18 °C65 °F / 6 °C43 °F
- August20 °C68 °F / 7 °C45 °F
- September23 °C73 °F / 9 °C48 °F
- October26 °C79 °F / 11 °C52 °F
- November30 °C86 °F / 14 °C57 °F
- December32 °C90 °F / 16 °C62 °F
Frequently asked questions
How warm is Santiago in December?
In December the average high in Santiago is 32 °C (90 °F) and the average low is 16 °C (62 °F).
Does it rain a lot in Santiago in December?
On average about 7 mm (0.3 in) of precipitation falls in December; it ranks 12th of the 12 months.
Is December the warmest month in Santiago?
No. The warmest month in Santiago is January, with an average high of 34 °C (92 °F). The coldest month is July, with an average low of 6 °C (43 °F).
How long is the day in Santiago in December?
In the middle of December the day in Santiago lasts about 14.4 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Santiago in December?
The average relative humidity in December is about 30%. This is a long-term average for the whole day.
How cloudy is Santiago in December?
On average about 37% of the sky is covered by cloud in December. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 1,154 m, while Santiago lies at about 556 m. Temperatures on this page were therefore adjusted by +3.9 °C7 °F using the standard lapse rate of 6.5 °C per 1,000 m.