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 33.9 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 34.7 °C by the end of September.
Expect significant rainfall in Santiago during September, with an average of 20 rainy days.
Is September a good time to visit Santiago? check out the best time to travel to Santiago page.
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10
Dry days
20
Rainy days
0
Snow days
35°/20°
Temperatures
16 km/h
Avg max wind
76 %
Avg humidity
Santiago in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  35° | 2  34° | 3 34° | 4 33° | 5 33° | 6  33° | 7  35° |
| 8 34° | 9 34° | 10 34° | 11 33° | 12 33° | 13 35° | 14  34° |
| 15  34° | 16 35° | 17 35° | 18 33° | 19 35° | 20 35° | 21 34° |
| 22 34° | 23 33° | 24 37° | 25 37° | 26 34° | 27 33° | 28 35° |
| 29  33° | 30 34° |
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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. | Thundery outbreaks possible | 35° /21° | 0.4 mm | 8 | |
| 2 Sept. | Patchy rain possible | 34° /21° | 0.8 mm | 7 | |
| 3 Sept. | Light rain shower | 34° /21° | 2.5 mm | 8 | |
| 4 Sept. | Light rain shower | 33° /20° | 3.5 mm | 7 | |
| 5 Sept. | Patchy rain possible | 33° /19° | 1.2 mm | 7 | |
| 6 Sept. | Mist | 33° /20° | 0.7 mm | 7 | |
| 7 Sept. | Cloudy | 35° /19° | 0.2 mm | 8 | |
| 8 Sept. | Patchy rain possible | 34° /20° | 2.4 mm | 7 | |
| 9 Sept. | Patchy rain possible | 34° /21° | 3 mm | 8 | |
| 10 Sept. | Thundery outbreaks possible | 34° /21° | 1.7 mm | 8 | |
| 11 Sept. | Patchy rain possible | 33° /20° | 2 mm | 7 | |
| 12 Sept. | Mist | 33° /20° | 6.6 mm | 7 | |
| 13 Sept. | Cloudy | 35° /21° | 9.4 mm | 8 | |
| 14 Sept. | Moderate or heavy rain shower | 34° /21° | 8.8 mm | 8 | |
| 15 Sept. | Moderate or heavy rain with thunder | 34° /21° | 17 mm | 8 | |
| 16 Sept. | Patchy rain possible | 35° /20° | 2.8 mm | 8 | |
| 17 Sept. | Patchy rain possible | 35° /21° | 0.6 mm | 8 | |
| 18 Sept. | Mist | 33° /21° | 0 mm | 7 | |
| 19 Sept. | Mist | 35° /22° | 0 mm | 8 | |
| 20 Sept. | Fog | 35° /20° | 1.4 mm | 8 | |
| 21 Sept. | Moderate or heavy rain shower | 34° /21° | 2.9 mm | 7 | |
| 22 Sept. | Thundery outbreaks possible | 34° /20° | 63.1 mm | 8 | |
| 23 Sept. | Thundery outbreaks possible | 33° /21° | 5 mm | 7 | |
| 24 Sept. | Thundery outbreaks possible | 37° /21° | 0 mm | 8 | |
| 25 Sept. | Thundery outbreaks possible | 37° /20° | 3.2 mm | 9 | |
| 26 Sept. | Fog | 34° /22° | 0 mm | 8 | |
| 27 Sept. | Patchy rain possible | 33° /22° | 0.1 mm | 8 | |
| 28 Sept. | Patchy rain possible | 35° /21° | 2.6 mm | 8 | |
| 29 Sept. | Patchy light drizzle | 33° /22° | 2.7 mm | 7 | |
| 30 Sept. | Patchy rain possible | 34° /22° | 1.4 mm | 7 | |
| 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.
Santiago in September - FAQ
What are the expected maximum and minimum temperatures in Santiago during September?
Expect warm days with temperatures around 35°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Santiago during September?
Moderate rainfall is anticipated in Santiago during September, with a total of 86.9 mm spread over approximately 20 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 16 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
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
- Insect Repellent: For destinations with mosquitos or other insects
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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