Santiago
September
Weather in Santiago for September 2025
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 moderately rise, reaching an average of 17.1 °C by the end of September.
Santiago experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 85.9 mm.
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Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
16°/6°
Temperatures
11 km/h
Avg max wind
57 %
Avg humidity
Santiago in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  18° | 2 14° | 3  14° | 4 17° | 5  18° | 6  15° | 7  14° |
| 8 15° | 9 16° | 10 14° | 11 13° | 12  13° | 13 15° | 14  19° |
| 15  21° | 16 20° | 17 15° | 18 16° | 19 17° | 20 16° | 21 16° |
| 22 13° | 23 14° | 24 15° | 25 15° | 26 16° | 27 18° | 28 18° |
| 29 19° | 30 19° |
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Temperatures trend during September in Santiago
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 18° /7° | 0.8 mm | 5 | |
| 2 Sept. | Light rain shower | 14° /2° | 8 mm | 4 | |
| 3 Sept. | Light rain | 14° /5° | 1.7 mm | 4 | |
| 4 Sept. | Light rain shower | 17° /6° | 2.5 mm | 5 | |
| 5 Sept. | Overcast | 18° /7° | 0.2 mm | 5 | |
| 6 Sept. | Moderate or heavy rain with thunder | 15° /5° | 27.5 mm | 5 | |
| 7 Sept. | Moderate rain at times | 14° /4° | 2.1 mm | 5 | |
| 8 Sept. | Patchy rain possible | 15° /6° | 0.6 mm | 5 | |
| 9 Sept. | Light rain shower | 16° /7° | 0.6 mm | 4 | |
| 10 Sept. | Patchy rain possible | 14° /5° | 2.2 mm | 4 | |
| 11 Sept. | Light rain shower | 13° /3° | 28.9 mm | 4 | |
| 12 Sept. | Thundery outbreaks possible | 13° /3° | 0.3 mm | 4 | |
| 13 Sept. | Overcast | 15° /5° | 0.3 mm | 5 | |
| 14 Sept. | Partly cloudy | 19° /9° | 0 mm | 6 | |
| 15 Sept. | Sunny | 21° /10° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 20° /9° | 0 mm | 6 | |
| 17 Sept. | Light drizzle | 15° /7° | 0.2 mm | 4 | |
| 18 Sept. | Sunny | 16° /5° | 0.1 mm | 5 | |
| 19 Sept. | Patchy rain possible | 17° /5° | 0.1 mm | 5 | |
| 20 Sept. | Sunny | 16° /6° | 0 mm | 5 | |
| 21 Sept. | Sunny | 16° /8° | 0 mm | 5 | |
| 22 Sept. | Patchy rain possible | 13° /7° | 1.7 mm | 4 | |
| 23 Sept. | Overcast | 14° /5° | 5.1 mm | 4 | |
| 24 Sept. | Sunny | 15° /4° | 2.2 mm | 5 | |
| 25 Sept. | Patchy rain possible | 15° /2° | 0.4 mm | 4 | |
| 26 Sept. | Sunny | 16° /3° | 0.1 mm | 5 | |
| 27 Sept. | Sunny | 18° /6° | 0 mm | 5 | |
| 28 Sept. | Sunny | 18° /7° | 0 mm | 6 | |
| 29 Sept. | Sunny | 19° /6° | 0 mm | 6 | |
| 30 Sept. | Sunny | 19° /9° | 0.4 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.
Santiago in September - FAQ
What are the expected maximum and minimum temperatures in Santiago during September?
Enjoy moderate daytime temperatures of up to 16° 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 85.9 mm spread over approximately 10 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 11 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Santiago in September?
As you prepare for your trip to Santiago in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Santiago, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Santiago
Explore the daily rainfall trends and prepare for Santiagos September weather 💧
UV exposure in Santiago during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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