Weather in Santiago for September 2025
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.
The climate of Santiago in September is notably wet, with an average of 12 rainy days.
Is September a good time to visit Santiago? check out the best time to travel to Santiago page.
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Santiago in September average weather
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
September weather day by day
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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Santiago in September - FAQ
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
UV exposure in Santiago during September
Quick links
Get accurate weather forecasts for Santiago, located at latitude -33.457 and longitude -70.648. Stay updated with localized weather information tailored for Santiago.