Monthly climate guide
Santiago weather in December
December in Santiago is typically hot, with average daytime highs around 29°C (83°F) and night-time lows near 13°C (55°F). The month usually brings about 8 mm of rain (very dry) and is a mix of sun and cloud. Daytime highs are 2°C warmer than November and about the same as January.
What stands out in December
- December is Santiago's third warmest month.
- In Santiago, December is early summer — the seasons are reversed south of the equator.
- Evenings cool off sharply: the daily range is around 16°C, so pack a layer.
- It's one of the drier months, with about 53% less rain than Santiago's average.
Avg high
29°C
83°F
Avg low
13°C
55°F
Rainfall
8 mm
very dry
Humidity
30%
relative
Sky
35%
cloud · a mix of sun and cloud
Santiago weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 30°C / 85°F | 15°C / 59°F | 7 mm | 32% | 34% |
| February | 29°C / 85°F | 15°C / 58°F | 9 mm | 32% | 31% |
| March | 28°C / 82°F | 13°C / 56°F | 6 mm | 30% | 35% |
| April | 24°C / 76°F | 11°C / 51°F | 12 mm | 33% | 52% |
| May | 20°C / 69°F | 8°C / 46°F | 27 mm | 38% | 68% |
| June | 16°C / 62°F | 4°C / 40°F | 48 mm | 47% | 70% |
| July | 16°C / 61°F | 4°C / 39°F | 28 mm | 50% | 71% |
| August | 18°C / 64°F | 5°C / 40°F | 25 mm | 48% | 69% |
| September | 20°C / 69°F | 6°C / 43°F | 12 mm | 45% | 66% |
| October | 22°C / 72°F | 7°C / 45°F | 14 mm | 39% | 63% |
| November | 27°C / 80°F | 11°C / 51°F | 7 mm | 31% | 45% |
| December | 29°C / 83°F | 13°C / 55°F | 8 mm | 30% | 35% |
What to pack for December
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is December a good time to visit Santiago?
Compare the months in the chart above to find your ideal window.
Best time to visit Santiago →Other Chile cities in December
Cite or embed this data
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Santiago weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/chile/santiago/december
<a href="https://weathercompare.eu/weather/chile/santiago/december">Santiago weather in December</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/chile/santiago" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Santiago weather in December"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/chile/santiago/december">Santiago weather in December</a> – WeatherCompare</p>
Santiago in December: quick answers
Is December a good time to visit Santiago?
December is a reasonable time for Santiago: highs around 29°C and about 8 mm of rain, though not one of the three best months.
How warm is Santiago in December?
Average highs are about 29°C (83°F) and average lows about 13°C (55°F), based on 10 years of daily data.
Does it rain a lot in Santiago in December?
Santiago typically gets around 8 mm of rain in December — very dry.
Figures are long-term averages for the area around Santiago (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.