Santiago
September
Weather in Santiago for September 2027
Your guide to Santiago weather in September - trends and predictions
In general, the average temperature in Santiago at the beginning of September is 15.7 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 18.1 °C by the end of September.
Santiago experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 57.7 mm.
Is September a good time to visit Santiago? check out the best time to travel to Santiago page.
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
17°/7°
Temperatures
12 km/h
Avg max wind
56 %
Avg humidity
Santiago Weather September
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Temperatures trend during September in Santiago
See the weather trend as well as the moving average line
September weather in Santiago day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 17° /8° | 0.4 mm | 4 | |
| 2 Sept. |  Light rain | 15° /6° | 4.2 mm | 4 | |
| 3 Sept. | Light rain | 13° /6° | 1.1 mm | 4 | |
| 4 Sept. |  Patchy rain possible | 16° /7° | 1.3 mm | 5 | |
| 5 Sept. | Overcast | 18° /8° | 0.1 mm | 5 | |
| 6 Sept. |  Moderate rain | 17° /7° | 13.8 mm | 5 | |
| 7 Sept. | Patchy rain possible | 15° /5° | 1.1 mm | 4 | |
| 8 Sept. | Patchy rain possible | 15° /6° | 0.3 mm | 4 | |
| 9 Sept. | Light rain shower | 17° /7° | 0.7 mm | 5 | |
| 10 Sept. | Patchy rain possible | 15° /7° | 1.7 mm | 4 | |
| 11 Sept. | Moderate rain | 16° /6° | 16.1 mm | 4 | |
| 12 Sept. |  Thundery outbreaks possible | 16° /5° | 0.2 mm | 5 | |
| 13 Sept. | Overcast | 16° /6° | 0.2 mm | 5 | |
| 14 Sept. |  Partly cloudy | 19° /9° | 0 mm | 6 | |
| 15 Sept. |  Sunny | 22° /10° | 0 mm | 6 | |
| 16 Sept. | Overcast | 22° /11° | 0 mm | 6 | |
| 17 Sept. | Overcast | 19° /10° | 0.1 mm | 4 | |
| 18 Sept. | Sunny | 19° /9° | 0.4 mm | 5 | |
| 19 Sept. | Sunny | 17° /7° | 0.4 mm | 5 | |
| 20 Sept. | Light rain | 16° /6° | 3.5 mm | 4 | |
| 21 Sept. | Patchy rain possible | 15° /6° | 1.3 mm | 4 | |
| 22 Sept. | Patchy rain possible | 17° /7° | 0.9 mm | 4 | |
| 23 Sept. | Light rain | 17° /8° | 2.6 mm | 4 | |
| 24 Sept. | Patchy rain possible | 19° /8° | 1.1 mm | 5 | |
| 25 Sept. | Patchy rain possible | 18° /7° | 1.5 mm | 4 | |
| 26 Sept. | Patchy rain possible | 17° /6° | 1.2 mm | 4 | |
| 27 Sept. | Sunny | 18° /6° | 0.3 mm | 6 | |
| 28 Sept. | Light rain | 18° /8° | 2.5 mm | 6 | |
| 29 Sept. | Overcast | 18° /7° | 0.3 mm | 4 | |
| 30 Sept. | Patchy rain possible | 19° /9° | 0.3 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Santiago in September 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.
Change Month
Santiago in September - FAQ
What are the expected maximum and minimum temperatures in Santiago during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Santiago during September?
Moderate rainfall is anticipated in Santiago during September, with a total of 57.7 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Santiago during September?
The average wind speed in Santiago during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
Santiago water temperatures in September
The average water temperature of the Pacific Ocean near Santiago in September is 12.3 °C. At the beginning of September temperatures are around 12.6 °C; by the end of the month they get a bit cooler and reach 11.9 °C.
- What is the water temperature in Santiago in September?
- The average water temperature in Santiago in September is 12.3 °C.
- Can you swim in Santiago in September?
- 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.
September rainfall patterns in Santiago
Explore the daily rainfall trends and prepare for Santiagos September weather 💧
Typically, Santiago has 7 rainy days in September with a total of 57.7 mm of rainfall.
UV exposure in Santiago during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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