Santiago
September
Weather in Santiago for September 2026
Your guide to Santiago weather in September - trends and predictions
In general, the average temperature in Santiago at the beginning of September is 15.9 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 18 °C by the end of September.
Santiago experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 64.6 mm.
Temperatures
Rain 🌧️
24
Dry days
6
Rainy days
0
Snow days
17°/6°
Temperatures
12 km/h
Avg max wind
54 %
Avg humidity
Santiago Weather September
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Temperatures trend during September in Santiago
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September weather in Santiago day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 17° /6° | 0.6 mm | 5 | |
| 2 Sept. | Light rain shower | 14° /3° | 5.6 mm | 4 | |
| 3 Sept. |  Light rain | 14° /5° | 1.1 mm | 4 | |
| 4 Sept. |  Sunny | 18° /6° | 1.7 mm | 5 | |
| 5 Sept. |  Overcast | 18° /7° | 0.1 mm | 5 | |
| 6 Sept. | Sunny | 16° /5° | 18.4 mm | 5 | |
| 7 Sept. |  Moderate rain at times | 14° /3° | 1.5 mm | 4 | |
| 8 Sept. | Patchy rain possible | 15° /5° | 0.4 mm | 4 | |
| 9 Sept. | Light rain shower | 18° /7° | 0.4 mm | 5 | |
| 10 Sept. | Patchy rain possible | 16° /6° | 1.5 mm | 5 | |
| 11 Sept. | Sunny | 17° /6° | 19.3 mm | 5 | |
| 12 Sept. |  Thundery outbreaks possible | 16° /4° | 0.2 mm | 5 | |
| 13 Sept. | Overcast | 15° /5° | 0.2 mm | 5 | |
| 14 Sept. |  Partly cloudy | 18° /8° | 0 mm | 6 | |
| 15 Sept. | Sunny | 21° /10° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 21° /10° | 0 mm | 6 | |
| 17 Sept. | Light drizzle | 17° /9° | 0.1 mm | 5 | |
| 18 Sept. | Sunny | 18° /7° | 0.1 mm | 5 | |
| 19 Sept. | Sunny | 17° /5° | 0.1 mm | 5 | |
| 20 Sept. | Sunny | 15° /5° | 3.2 mm | 5 | |
| 21 Sept. | Sunny | 14° /5° | 1.7 mm | 5 | |
| 22 Sept. | Patchy rain possible | 15° /5° | 1.2 mm | 4 | |
| 23 Sept. | Overcast | 16° /6° | 3.4 mm | 5 | |
| 24 Sept. | Sunny | 19° /6° | 1.5 mm | 6 | |
| 25 Sept. | Patchy rain possible | 18° /5° | 0.3 mm | 5 | |
| 26 Sept. | Sunny | 15° /3° | 1.6 mm | 4 | |
| 27 Sept. | Sunny | 17° /4° | 0 mm | 5 | |
| 28 Sept. | Sunny | 18° /7° | 0 mm | 5 | |
| 29 Sept. | Sunny | 19° /6° | 0.3 mm | 5 | |
| 30 Sept. | Sunny | 20° /9° | 0.3 mm | 6 | |
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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 6°. 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 64.6 mm spread over approximately 6 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.
September rainfall patterns in Santiago
Explore the daily rainfall trends and prepare for Santiagos September weather 💧
Typically, Santiago has 6 rainy days in September with a total of 64.6 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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