Planning a trip to Santiago in September? You are in luck! The weather is generally good, with an average maximum temperature of +19°C and approximately 11 sunny days. Just be prepared for some rain, as there are usually around 5 rainy days and 55 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Average weather
☀️
+19°C
Avg. max. temperature
-2°C
Min.
+32°C
Max.
55 mm
Total precipitation
70%
Avg. humidity
1 m/s
Avg. wind
11 ☀️
Sunny Days
14 ⛅️
Cloudy
5 🌦
Rainy
Our opinion: Santiago has good weather in September.
Average temperature in Santiago in September
Here are the expected maximum, average and minimum temperatures in Santiago for September based on the historical data.
Last Year
Historical Data
The expected average maximum temperature in September is +19°C with a maximum of +27°C and a minimum of +3°C.
The average maximum temperature goes up 29% by the end of the month, compared with the beginning of the month, from +18°C to +25°C.
Is Santiago warm or cold in September?
Santiago is typically mild in September.
Maximum temperatures go up compared to the previous month from +17°C to +19°C. The minimum temperature also goes up from +6°C to +7°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Santiago:
Climate in Santiago in September
Santiago weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+17°C
+19°C
+22°C
Min. temperature
-4°C
-2°C
0°C
Max. temperature
+31°C
+32°C
+32°C
Rainfall
75 mm
55 mm
31 mm
Wind
1 m/s
1 m/s
1 m/s
Humidity
74%
70%
63%
Air pressure
1017 HPa
1016 HPa
1015 HPa
Sunny days
10
11
15
Cloudy days
16
14
13
Rainy days
5
5
3
Snowy days
0
0
0
September weather is still as good as in August.It’s getting warmer as September arrives. The average maximum temperature goes up from +17°C to +19°C during the day.As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 75 mm to 55 mm.It feels drier, as humidity decreases from 74% to 70%.The average wind speed doesn’t change much during September, staying around 1 m/s.The good news is there are likely to be more sunny days in September, from 10 to 11.
October brings much the same weather, it remains good.
Wind speed in Santiago in September based on historical data.
Last Year
Historical Data
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Santiago is gradually increasing during September, going from 2 m/s to 3 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Santiago based on historical data.
Last Year
Historical Data
A chance of rain on a typical day in September stands at 30%, leading to total precipitation of around 39 mm. The maximum amount of rainfall per day is around 10 mm, which is considered light rain.On average, there are about 9 rainy days during September, so prepare to bring an umbrella.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Santiago wettest month is June, where a typical day has a 17% chance of precipitation and 92 mm of rainfall per day. January, on the other hand, is the driest month with a mere 0% chance of precipitation and 4 mm of rainfall per day.
How was the weather last September in Santiago?
This is the weather in Santiago in September 2023:
1 September
☁️
+18°C
2 September
🌫️
+22°C
3 September
☀️
+24°C
4 September
☀️
+25°C
5 September
☀️
+27°C
6 September
☀️
+24°C
7 September
🌧️
+16°C
8 September
🌧️
+11°C
9 September
☀️
+19°C
10 September
☀️
+20°C
11 September
☁️
+15°C
12 September
☀️
+17°C
13 September
🌫️
+17°C
14 September
☀️
+23°C
15 September
☀️
+24°C
16 September
☀️
+19°C
17 September
🌧️
+15°C
18 September
🌧️
+13°C
19 September
☁️
+16°C
20 September
🌧️
+13°C
21 September
☀️
+15°C
22 September
☀️
+21°C
23 September
☀️
+20°C
24 September
🌧️
+15°C
25 September
☁️
+19°C
26 September
☁️
+18°C
27 September
☀️
+22°C
28 September
☀️
+22°C
29 September
🌫️
+22°C
30 September
🌫️
+25°C
In September 2023 Santiago had 15 sunny days, 5 cloudy days, and 6 rainy days. The average maximum temperature was +19°C, with an absolute maximum of +27°C and a minimum of +11°C. The average humidity was 60%, with a maximum of 93% and a minimum of 15%. The average wind speed was 3 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change over Years
This is how Santiago climate have been changing during last 43 years period.
The climate in Santiago in September has not changed much over the last 43 years.
The average temperature was the lowest in 2009 (+18°C) and the highest in 1994 (+24°C). The driest year was 2020 with only 4 mm of rainfall, and the wettest year was 1982 with 187 mm.
FAQ
Frequently asked questions about the weather in Santiago in September:
Is September a good time to visit Santiago?
September is a really good time to go to Santiago. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Santiago.
Can you sunbathe in Santiago in September?
September has mild temperatures in Santiago. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is Santiago rainy in September?
Santiago is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Santiago in September?
The amount of sunny days in Santiago during September varies; prepare for a mix of clouds and sun.
For this page, we’ve looked at the typical weather in Santiago, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.