Santiago
December
Weather in Santiago for December 2026
Your guide to Santiago weather in December - trends and predictions
In general, the average temperature in Santiago at the beginning of December is 21.1 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25.5 °C by the end of December.
With an average of 2 rainy days, Santiago experiences minimal rainfall in December.
Is December a good time to visit Santiago? check out the best time to travel to Santiago page.
Temperatures
Rain 🌧️
More
29
Dry days
2
Rainy days
0
Snow days
23°/12°
Temperatures
18 km/h
Avg max wind
36 %
Avg humidity
Santiago Weather December
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Temperatures trend during December in Santiago
See the weather trend as well as the moving average line
December weather in Santiago day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Sunny | 19° /8° | 0 mm | 7 | |
| 2 Dec. | Sunny | 19° /8° | 0 mm | 7 | |
| 3 Dec. | Sunny | 21° /10° | 0 mm | 8 | |
| 4 Dec. | Sunny | 21° /10° | 0 mm | 8 | |
| 5 Dec. | Sunny | 21° /8° | 0 mm | 7 | |
| 6 Dec. |  Overcast | 22° /11° | 0.4 mm | 7 | |
| 7 Dec. | Sunny | 24° /12° | 0.1 mm | 7 | |
| 8 Dec. | Sunny | 23° /11° | 0 mm | 8 | |
| 9 Dec. | Sunny | 26° /13° | 0 mm | 9 | |
| 10 Dec. |  Partly cloudy | 25° /14° | 0 mm | 8 | |
| 11 Dec. | Sunny | 22° /12° | 0.6 mm | 8 | |
| 12 Dec. | Sunny | 24° /11° | 0 mm | 8 | |
| 13 Dec. | Sunny | 25° /11° | 0.1 mm | 8 | |
| 14 Dec. |  Patchy rain possible | 19° /10° | 1.9 mm | 7 | |
| 15 Dec. | Sunny | 23° /10° | 0 mm | 8 | |
| 16 Dec. | Sunny | 24° /12° | 0 mm | 8 | |
| 17 Dec. | Sunny | 22° /10° | 0 mm | 8 | |
| 18 Dec. | Sunny | 23° /11° | 0 mm | 8 | |
| 19 Dec. | Sunny | 22° /11° | 0.1 mm | 8 | |
| 20 Dec. | Sunny | 21° /10° | 0.2 mm | 7 | |
| 21 Dec. | Sunny | 23° /10° | 0 mm | 10 | |
| 22 Dec. | Sunny | 26° /14° | 0 mm | 10 | |
| 23 Dec. | Sunny | 25° /15° | 0 mm | 9 | |
| 24 Dec. | Sunny | 25° /14° | 0 mm | 9 | |
| 25 Dec. | Sunny | 26° /14° | 0 mm | 9 | |
| 26 Dec. | Patchy rain possible | 24° /14° | 0.1 mm | 8 | |
| 27 Dec. | Patchy rain possible | 26° /14° | 0.1 mm | 8 | |
| 28 Dec. | Patchy rain possible | 26° /16° | 0.5 mm | 8 | |
| 29 Dec. | Patchy rain possible | 27° /15° | 0 mm | 9 | |
| 30 Dec. | Patchy rain possible | 27° /14° | 0.1 mm | 8 | |
| 31 Dec. |  Light rain | 23° /14° | 3.1 mm | 8 | |
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Important Notice
Our weather forecast for Santiago in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Santiago forecast closer to your planned date for the most up-to-date weather information.
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Santiago in December - FAQ
What are the expected maximum and minimum temperatures in Santiago during December?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Santiago during December?
Rainfall in Santiago during December is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Santiago during December?
The average wind speed in Santiago during December is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
Santiago water temperatures in December
The average water temperature of the Pacific Ocean near Santiago in December is 14.3 °C. At the beginning of December temperatures are around 14.3 °C; by the end of the month they stay fairly steady and reach 14.3 °C.
- What is the water temperature in Santiago in December?
- The average water temperature in Santiago in December is 14.3 °C.
- Can you swim in Santiago in December?
- Cold enough that you lose heat fast. A full 4–5 mm wetsuit (plus hood/gloves for comfort) is advisable for anything beyond a brief plunge.
December rainfall patterns in Santiago
Explore the daily rainfall trends and prepare for Santiagos December weather 💧
Typically, Santiago has 2 rainy days in December with a total of 7.1 mm of rainfall.
UV exposure in Santiago during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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