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Weather in Santiago for December 2025

Your guide to Santiago weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in Santiago has been nearly identical to the historical average, with a temperature of 23.3 °C (showing only a slight deviation of 0.5 °C).

  • The forecast for the coming days of December 2025 predicts a temperature of 30.2 °C , which is warmer than usual.

  • In general, the average temperature in Santiago at the beginning of December is 21.6 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 27.9 °C by the end of December.

    • Rain 🌧️

  • Precipitation in Santiago during December is a rare event, with an average of fewer than 2 rainy days.

Average dry days
30
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/11°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
34 %
Avg humidity

Santiago Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
20°
2
Sunny
20°
3
Sunny
22°
4
Sunny
22°
5
Sunny
21°
6
Overcast
22°
7
Sunny
24°
8
Sunny
23°
9
Sunny
26°
10
Partly cloudy
26°
11
Sunny
23°
12
Sunny
25°
13
Sunny
25°
14
Partly cloudy
20°
15
Sunny
23°
16
Sunny
34°
17
Sunny
30°
18
Sunny
31°
19
Sunny
30°
20
Sunny
29°
21
Sunny
27°
22
Sunny
29°
23
Sunny
32°
24
Sunny
33°
25
Sunny
30°
26
Sunny
30°
27
Sunny
29°
28
Sunny
29°
29
Sunny
30°
30
Patchy rain possible
26°
31
Sunny
21°

Temperatures trend during December in Santiago

See the weather trend as well as the moving average line

December weather in Santiago day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Sunny
Sunny
 20° /8° 0 mm 7
2 Dec. Sunny
Sunny
 20° /8° 0 mm 7
3 Dec. Sunny
Sunny
 22° /9° 0 mm 8
4 Dec. Sunny
Sunny
 22° /10° 0 mm 8
5 Dec. Sunny
Sunny
 21° /8° 0 mm 7
6 Dec. Overcast
Overcast
 22° /10° 0.4 mm 7
7 Dec. Sunny
Sunny
 24° /12° 0.1 mm 7
8 Dec. Sunny
Sunny
 23° /11° 0 mm 8
9 Dec. Sunny
Sunny
 26° /12° 0 mm 9
10 Dec. Partly cloudy
Partly cloudy
 26° /14° 0 mm 8
11 Dec. Sunny
Sunny
 23° /11° 0.6 mm 8
12 Dec. Sunny
Sunny
 25° /10° 0 mm 8
13 Dec. Sunny
Sunny
 25° /11° 0.1 mm 8
14 Dec. Partly cloudy
Partly cloudy
 20° /9° 1.9 mm 7
15 Dec. Sunny
Sunny
 23° /10° 0 mm 8
16 Dec. Sunny
Sunny
 34° /13° 0 mm 3.6
17 Dec. Sunny
Sunny
 30° /16° 0 mm 3.7
18 Dec. Sunny
Sunny
 31° /15° 0 mm 3.6
19 Dec. Sunny
Sunny
 30° /16° 0.1 mm 3.8
20 Dec. Sunny
Sunny
 29° /15° 0 mm 0.3
21 Dec. Sunny
Sunny
 27° /15° 0 mm 9
22 Dec. Sunny
Sunny
 29° /15° 0 mm 9
23 Dec. Sunny
Sunny
 32° /14° 0 mm 9
24 Dec. Sunny
Sunny
 33° /15° 0 mm 9
25 Dec. Sunny
Sunny
 30° /16° 0 mm 9
26 Dec. Sunny
Sunny
 30° /15° 0 mm 9
27 Dec. Sunny
Sunny
 29° /16° 0 mm 9
28 Dec. Sunny
Sunny
 29° /15° 0 mm 9
29 Dec. Sunny
Sunny
 30° /13° 0 mm 9
30 Dec. Patchy rain possible
Patchy rain possible
 26° /14° 0.1 mm 7
31 Dec. Sunny
Sunny
 21° /11° 4.1 mm 6
Next
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 11°. 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 1 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. Temperatures remain fairly consistent throughout the month.

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 1 rainy days in December with a total of 5.2 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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Get accurate weather forecasts for Santiago, located at latitude -33.457 and longitude -70.648. Stay updated with localized weather information tailored for Santiago.

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