Santiago weather in September 2025

The weather in Santiago in September is very cold with temperatures between 3°C and 17°C, warm clothes are a must.

The wather in Santiago in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.

Our weather forecast can give you a great sense of what weather to expect in Santiago in September 2025.

If you’re planning to visit Santiago in the near future, we highly recommend that you review the 14 day weather forecast for Santiago before you arrive.

Temperatures

17° / 3°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

11.3

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 15° /6°	2 15° /5°	3 16° /7°	4 17° /7°	5 16° /6°	6 15° /6°
7 13° /4°	8 13° /3°	9 15° /5°	10 15° /6°	11 14° /5°	12 14° /5°	13 14° /6°
14 18° /7°	15 17° /8°	16 17° /9°	17 15° /7°	18 15° /6°	19 16° /6°	20 16° /7°
21 18° /8°	22 17° /8°	23 18° /9°	24 20° /9°	25 17° /5°	26 15° /6°	27 17° /7°
28 19° /9°	29 17° /6°	30 16° /6°

Explore the weather in Santiago in other months

Santiago annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	25° / 12°	0	31	0	7 mm	Perfect	Santiago in January
February	26° / 12°	1	27	0	4 mm	Perfect	Santiago in February
March	25° / 11°	0	31	0	2 mm	Perfect	Santiago in March
April	23° / 8°	1	30	0	5 mm	Perfect	Santiago in April
May	19° / 6°	2	29	0	48 mm	Good	Santiago in May
June	15° / 2°	4	25	1	116 mm	Good	Santiago in June
July	14° / 1°	2	27	1	59 mm	Good	Santiago in July
August	16° / 2°	3	28	0	69 mm	Good	Santiago in August
September	17° / 3°	2	28	0	30 mm	Good	Santiago in September
October	20° / 5°	2	29	0	19 mm	Good	Santiago in October
November	23° / 8°	1	29	0	7 mm	Perfect	Santiago in November
December	25° / 11°	1	30	0	4 mm	Perfect	Santiago in December